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Equipment Discussions >> Classic Telescopes

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youngamateur42
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Reged: 11/21/12

Loc: La Verne, CA
Ruining the nostalgia?
      #6048143 - 08/27/13 02:43 AM

I've been using my RV-6 now quite a bit, finding objects and such, and I build a 50mm right angle finder and wanted to mount it on the scope. I have a few problems with this. First, I once used a RA finder by itself and found it very difficult to use without a red dot or similar finder. That's why the straight through on the 6" is great, except I find that my neck is killing me after a few minutes of finding an object. Second, I don't want to kill that antique "feel" to the scope by putting all sorts of modern things on it. I also eventually want to get a helical focuser for it. Third, is there enough space on the tube for 2 finder devices? If so, the Telrad is pretty bulky but very good. Still have to rig up some kind of mounting rings for the finder, and I don't want to dril into that tube. So what do you think? Thoughts and suggestions welcome.

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turk123
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Re: Ruining the nostalgia? new [Re: youngamateur42]
      #6048241 - 08/27/13 06:26 AM

If you don't want to drill holes, I think the finder is out. The telrad is big and bulky and "square". You might do what I did when first starting out. Two small strips of Velcro hidden on the bottom of the tube or maybe on the cradle, and a green laser. Don't shoot your eye out!

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roscoe
curmudgeon
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Reged: 02/04/09

Loc: NW Mass, inches from VT
Re: Ruining the nostalgia? new [Re: turk123]
      #6048278 - 08/27/13 07:26 AM

What about holding it to the tube with a couple of large hose clamps? You could line them with stick-on felt if you wanted....
R


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terraclarke
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Re: Ruining the nostalgia? new [Re: roscoe]
      #6048326 - 08/27/13 08:10 AM

Zip ties are another mounting option. They can hold a Telrad base quite firmly if you can find them long enough to fit round the tube. I have used them on a 5 inch diameter tube to hold a telrad base. You can get black ones about 3/8 inch wide at Lowes.

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Sean Cunneen
Let Me Think
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Reged: 08/01/07

Loc: Blue Island Illinois
Re: Ruining the nostalgia? new [Re: terraclarke]
      #6048353 - 08/27/13 08:33 AM

I had the same issues, I have a hard time working with just a finderscope.I use hose clamps on mine. An 8" hoseclamp costs $3 from your hardware store.

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youngamateur42
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Reged: 11/21/12

Loc: La Verne, CA
Re: Ruining the nostalgia? new [Re: Sean Cunneen]
      #6048372 - 08/27/13 08:43 AM

Well te regular telrad mounts with foam tape right? If I ever do want to take it off, how hard is it to remove? Also, I thouhght more about the finder and thought, well there already is a place in the tube where 2 holes have been drilled, so when I make the mounting rings, I could put the holes like right there. I don't want to ruin the classic feel to the scope though

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jgraham
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Re: Ruining the nostalgia? new [Re: youngamateur42]
      #6048411 - 08/27/13 09:04 AM

I've used Nylon cargo straps. They don't look too bad if you find a nice color. A leather strap or belt might also look nice. A set of tube rings down by the saddle might also work well and provide a nice attachment point for other things.

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bremms
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Re: Ruining the nostalgia? new [Re: jgraham]
      #6048493 - 08/27/13 09:56 AM

I put a right angle 35mm finder on my RV6 way back when. It was 6x and 8 deg field. Fit perfectly in the stock finder bracket. Still need to sight down the scope a little but with such a wide field it was easy. Got a surplus lens from Edmund and used the old Edmund 1 1/8" EP. Think I even glued in some crosshairs.

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DAVIDG
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Reged: 12/02/04

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Re: Ruining the nostalgia? new [Re: jgraham]
      #6048514 - 08/27/13 10:10 AM

You have setting circles on that mount. If you haven't learned to use them, you might be surpised at how well they work and you won't need another finder. Many starchart APPS have a nice feature of showing you were Polaris is vs the pole with an image that matches the type of finder on the scope ie inverted or flipped. So this makes polar aligning a breeze. Then all you do is go to a bright star, center it and calibrate your circles to read the RA and DEC of that star. The RA circle on the RV-6 isn't driven so you either have to keep track of the delta time from when you first calibrated your RA circle and add this offset to RA of the next object you want to find or simply adjust the RA circle to read the RA of objective your observing just before you go looking for the next object. Another trick to point the scope at a bright star that is near the object you wantt to observing and make sure the circles read the correct RA and DEC of that star the move the scope to cooridinates of the object you want to observe. With a little practice you'll be finding objects almost a fast as modern scope with motorized GOTO.

- Dave


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Jon Isaacs
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Re: Ruining the nostalgia? new [Re: DAVIDG]
      #6048557 - 08/27/13 10:37 AM

If you want to mount a finder, make a bracket that uses the existing holes and provides a place to attach a standard Vixen/Orion/Synta finder dovetail. A piece of aluminum channel is a good place to start but it could be wood too that was shaped to fit.

Jon


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apfever
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Reged: 05/13/08

Loc: Colorado
Re: Ruining the nostalgia? new [Re: Jon Isaacs]
      #6048619 - 08/27/13 11:14 AM Attachment (21 downloads)

Wood is a great medium to work with. It would be an excellent choice for matching up to the original offset finder bracket holes.

I highly suggest you put some reinforcement on the inside of the tube if you use the finder holes. Ask your hardware store about metal plumbing strap. You can also bend a regular washer to fit the curve. A fender washer is an excellent choice. I've seen many an RV-6 bakelite tube give way in the finder bracket area. The finder is the easiest thing to bump, hit, stress, or just accidently obliterate. A larger supporting surface on the inside for the bolt is not a small help. It's huge.

Here's a picture of two tubes I have here. Notice the typical cracks on the finder holes. These are typical, without abuse. These cracks are not on the focuser holes or spider vane holes on these tubes. I've seen a lot more besides these.


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actionhac
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Re: Ruining the nostalgia? new [Re: Jon Isaacs]
      #6048629 - 08/27/13 11:22 AM

Look here and Scroll down to #SFTP adapter plate:
http://www.scopestuff.com/ss_sfind.htm
This adapter plate is a flat deck you can mount whatever you want to it (like finder rings) and it will install on a Telrad base.
You can then mount the Telrad base on your scope with the double back foam tape and have interchangeable finders.
To remove a Telrad base from your scope you can saw through the double back foam mounting tape with dental floss or heat the base with a hair dryer to soften the bond and pull it off.
I like the Telrad reflex sight it is a very fast finder. Be sure and get or make a dew shield for it.
I must admit that I do not use a Telrad on my classic scopes. That is soon to change though because it is a excellent sight.

Robert


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tim53
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Re: Ruining the nostalgia? new [Re: actionhac]
      #6048635 - 08/27/13 11:32 AM

Telrads are great planet finders for lazy guys like myself who don't like bending at odd angles or getting on my knees in the grass. Simply look down on the reticle through the window - like a right angle finder. Planets are bright enough to still be visible along with the reticle even though you're using the windo as an unaluminized mirror.

Tim


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bierbelly
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Loc: Sterling, VA
Re: Ruining the nostalgia? new [Re: youngamateur42]
      #6048792 - 08/27/13 01:03 PM

Quote:

Well te regular telrad mounts with foam tape right? If I ever do want to take it off, how hard is it to remove? Also, I thouhght more about the finder and thought, well there already is a place in the tube where 2 holes have been drilled, so when I make the mounting rings, I could put the holes like right there. I don't want to ruin the classic feel to the scope though




Telrad tape is easy to remove. Razor blade and a little bit of solvent, like alcohol or paint thinner.

Hey, while it's a "classic", do you want it to be a usable scope or a museum piece?

Edited by bierbelly (08/27/13 01:04 PM)


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actionhac
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Re: Ruining the nostalgia? new [Re: bierbelly]
      #6048829 - 08/27/13 01:21 PM Attachment (9 downloads)

Rigel QuickFinder is another reflex like the Telrad.
http://www.company7.com/rigel/products/qwikfinder.html
The detachable base has only one central screw (or tape) and a small footprint which is great for a scope that already has a optical finder.


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rigelsys
Vendor (Rigel Systems)


Reged: 08/22/06

Re: Ruining the nostalgia? new [Re: actionhac]
      #6048919 - 08/27/13 01:57 PM

Love your scale model :-)

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rigelsys
Vendor (Rigel Systems)


Reged: 08/22/06

Re: Ruining the nostalgia? new [Re: rigelsys]
      #6048923 - 08/27/13 01:59 PM

Quote:

Love your scale model :-)




on my c-5 I use weatherstripping foam tape (adhesive on one side) on the rails of the quikfinder base, and then zip ties around the tube over the front and back of the base. Works fine. Or, you can use big rubber bands, till you find the right place.


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Gil V
professor emeritus


Reged: 09/09/12

Re: Ruining the nostalgia? new [Re: rigelsys]
      #6048980 - 08/27/13 02:24 PM

i'd just add a red dot finder. The field of view in that scope is big enough to accomodate it, and tgey are relatively unobtrusive. You could probably mount it right on the existing 6x30 finder.

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Chuck Hards
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Loc: The Great Basin
Re: Ruining the nostalgia? new [Re: Gil V]
      #6049048 - 08/27/13 03:07 PM

I remember back in the 60's, my first 4.25" reflector didn't even have a finder. I sighted along the main tube to find objects. After a while, it worked pretty well.

Of course, I was a lot more limber at age ten than I am now.

Darnit.


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Mirzam
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Re: Ruining the nostalgia? new [Re: Chuck Hards]
      #6049099 - 08/27/13 03:29 PM

Two possible tips:

1. You can add zip ties together; they don't have to be super long.

2. You may be able to zip tie a telrad to the existing finder. Won't look that good but may work pretty well.

JimC


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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: Ruining the nostalgia? new [Re: terraclarke]
      #6049104 - 08/27/13 03:32 PM

Quote:

Zip ties are another mounting option. They can hold a Telrad base quite firmly if you can find them long enough to fit round the tube. I have used them on a 5 inch diameter tube to hold a telrad base. You can get black ones about 3/8 inch wide at Lowes.




You don't need to find zip ties long enough; just string them together: male end of #1 goes in female end of #2, etc.


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terraclarke
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Loc: Just South of the Mason-Dixon ...
Re: Ruining the nostalgia? new [Re: Thomas Karpf]
      #6049157 - 08/27/13 04:02 PM

That's a good Idea Tom, I never thought of that. I am thinking of putting a Telrad on my 6 inch F4.5 reflector, but don't want to mess up my powercoating with the Telrad tape so I will just string two together for each of the two bands.

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Joe Cepleur
Carpal Tunnel


Reged: 03/18/10

Loc: Dark North Woods
Re: Ruining the nostalgia? new [Re: Jon Isaacs]
      #6049308 - 08/27/13 05:12 PM

I sympathize. Personally, I find the discomfort of straight-through finders too miserable to bear when sighting over 40 degrees altitude. I like right-angles. This is purely personal. Many folks have no trouble with discomfort, and much prefer what they find to be the intuitive workings of straight-throughs.

With all the good advice on how to mount a finder without scratching your tube, you needn't worry about causing any damage. As far as being inauthentic in mounting a right-angle finder, don't worry. Anything removable that works for you and keeps you comfortable is fair game. Adding a right-angle finder is something a customizer might have done back in the day anyway.

Perhaps you could find a vintage right-angle finder. I was thrilled to find a vintage, orange University Optics 8x50 right-angle finder for one of my orange C8s. The other may get a blue Meade 9x50 of the similar vintage (slightly newer), or even just a modern Orion. No way will the original 6x30 straight-through remain, other than in safekeeping for posterity. My neck says, "No!"

If you can use a straight-through briefly without discomfort, try sighting down the tube prior to sighting with the finder. With a little practice, you may be able to get the object into the finder first try nearly every time. Then, tweak it into the crosshairs, and you're done.


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youngamateur42
Carpal Tunnel
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Reged: 11/21/12

Loc: La Verne, CA
Re: Ruining the nostalgia? new [Re: bierbelly]
      #6049466 - 08/27/13 07:06 PM

To answer your question this scope is not intended as a museum piece but rather the main telescope I use, so I want it to have the most practical finding devices which I think are the 50mm finder and telrad/equivalent. Now that I know that the telrad tape is removable without messing up the tube, that's definitely an oprion to consider. Someone mentioned how the holes drilled for the original finder are often cracked; thank you, I have heard this tube material gets brittle over time and can crack or break. Someone else suggested I find a vintage 50mm finder; I've seen lots of this type of vintage finder for sale before, but when I restored the scope, I repainted the tube with a slightly yellow tinge to the paint, see here:

http://www.cloudynights.com/ubbthreads/showflat.php?Cat=0&Board=classics&...

So I like to have things matching, so I think I might paint the finder I made with the same color and add that same black trim to the front of it.

Still have to make a plate that will fit the existing holes and make rings to attach the finder, so I've definitely got some things to do!


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Mr Magoo
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Reged: 11/05/05

Loc: Indiana
Re: Ruining the nostalgia? new [Re: DAVIDG]
      #6049999 - 08/28/13 02:03 AM

Quote:

Another trick to point the scope at a bright star that is near the object you wantt to observing and make sure the circles read the correct RA and DEC of that star the move the scope to cooridinates of the object you want to observe.

- Dave




That is exactly how I use mine.


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Datapanic
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Loc: Tucson, Arizona
Re: Ruining the nostalgia? new [Re: Mr Magoo]
      #6050011 - 08/28/13 02:25 AM Attachment (7 downloads)

Okay, I'm going to be the one that goes against the grain here. If you plan on keeping it forever, then do what you want with it to further enjoy using it!

Here's a pic of the top end of my 8" Cave f/7 I bought new when I was 15. I still have it and it's been through many different configurations and I don't care about purists because I'm always going to keep it.

I say, modify your scope any way you want! Better to use it than get disappointed at it for its limitations that could be taken care of.

For me, it was prime focus photography and involved installing a short focuser and tube weights to handle the camera's weight. If I didn't do that, sure, I'd have a nice "specimen" but I wanted to use the scope and that's what I did!


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BigC
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Reged: 09/29/10

Loc: SE Indiana
Re: Ruining the nostalgia? new [Re: Mirzam]
      #6050641 - 08/28/13 12:46 PM

Probably the most secure ,yet reversible, would be the use of metal hose clamps with felt or other padding.

I understand the reluctance to make permanent changes and ruin the value to collectors.

Yet was the telescope made to be looked through or looked at?

How many would have had nerve to tell Clyde Tombaugh his portable homemade 9" reflector on a lawn mower base "wasn't professional enough"?


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Chuck Hards
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Reged: 05/03/10

Loc: The Great Basin
Re: Ruining the nostalgia? new [Re: Mirzam]
      #6050667 - 08/28/13 01:01 PM

When you used a right-angle finder, was it a correct-image diagonal, or simply a mirror or right-angle prism, which would reverse the image? Try the correct-image diagonal and it may make things easier for you.

The nice thing about a right-angle finder is that if built right, you can use it straight-through, as well. Here is a home-made finder I built in '98, that uses a 35mm binocular objective and all plastic construction. The eyepiece is an old Edmund 1-1/8" f.l. Plossl, with a surplus cross-hair reticle installed at the focal plane. I turned some retaining rings from PVC and secured them with a thin fillet of white silicone around the end. It is removeable if I ever desire to do so.

Right-angle configuration:


Straight-through configuration:


The modified eyepiece:


35mm not enough aperture for you? Here's one with a 55mm objective, also convertable from right-angle to straight-through:


And I like JimC's suggestion of attaching the red-dot sight directly to the optical finder. Some commercial reflex sights are very small and would fit just fine. It would probably be easier than attaching it to the main OTA.


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bremms
Carpal Tunnel
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Reged: 08/31/12

Loc: SC
Re: Ruining the nostalgia? new [Re: Chuck Hards]
      #6050894 - 08/28/13 03:19 PM

Chuck.. That is exactly like my old finder down to the Edmund 1 1/8 EP. Mine was 35mm too but had a metal tube...

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Chuck Hards
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Reged: 05/03/10

Loc: The Great Basin
Re: Ruining the nostalgia? new [Re: bremms]
      #6051084 - 08/28/13 05:08 PM

Quote:

Chuck.. That is exactly like my old finder down to the Edmund 1 1/8 EP. Mine was 35mm too but had a metal tube...




Both the 35mm bino objective and that great old Edmund eyepiece are perfect finder components...I'm not surprised that the two of us came up with essentially the same finder independantly. Great minds think alike!

That was during my "PVC" phase. I turned the bino objective cell down in the lathe until it was a slip-fit inside the PVC tube, then just glued it in. The objective itself is still removeable by just unscrewing the retaining ring.

I still use PVC for some parts because it machines easily and is available in pipe and sheet, up to 1-1/2" thick. But I've been using aluminum more and more in the intervening years.

Note the storm-door screen insert retainer screw used as a thumbscrew in the PVC tailpiece. I got a box of them at the hardware store before I found them in Nylon at McMaster-Carr. I stuck a small Teflon plug in the setscrew hole so the aluminum screw itself doesn't mar the eyepiece/extension tube/diagonal barrel, it just bears against the Teflon, which in turn bears against the eyepiece or whatever.


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actionhac
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Reged: 08/09/08

Loc: Seattle
Re: Ruining the nostalgia? new [Re: Chuck Hards]
      #6052433 - 08/29/13 12:15 PM Attachment (7 downloads)

I bought this scope yesterday and someone did have some issues with the Telrad tape.

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Chuck Hards
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Reged: 05/03/10

Loc: The Great Basin
Re: Ruining the nostalgia? new [Re: actionhac]
      #6052439 - 08/29/13 12:17 PM

Wow, looks like it was left in the gerbil cage!

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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Ruining the nostalgia? new [Re: Chuck Hards]
      #6052497 - 08/29/13 12:46 PM

I have heard similar horror stories about getting Telrad tape off. Some say it comes off easier if you heat it with a hair dryer. The only way I would attach one is with screws in existing tube holes or straps. I think the tape is only good for attaching felt and then I wonder if the adhesive wouldn't seep through the fabric over time and discolor the underlying paint or otherwist affect the finish. Like spray on expandible foam, use with extreme caution!

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bierbelly
Postmaster
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Reged: 01/23/04

Loc: Sterling, VA
Re: Ruining the nostalgia? new [Re: actionhac]
      #6052563 - 08/29/13 01:26 PM

Quote:

I bought this scope yesterday and someone did have some issues with the Telrad tape.




Well, on a paper tube...I don't suppose you have too many options. Certainly can't screw mount it. Probably the zip ties would be the best solution, or the hose clamps.


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actionhac
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Reged: 08/09/08

Loc: Seattle
Re: Ruining the nostalgia? new [Re: bierbelly]
      #6052808 - 08/29/13 03:32 PM Attachment (5 downloads)

I have a feeling what happened the Telrad struck something and was ripped from the tube. The tube covering skin let go rather than the tape. The tube skin was then "grafted" back on with glue, probably between tears and passing in and out of consciousness by someone and it left the Telrad at such an angle that it was not possible to align it with the telescope.
I cut away all the mess and painted the area with a closely matching paint, I will try and sand the fuzzies off and recoat in 24hrs. What a disaster.


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bierbelly
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Reged: 01/23/04

Loc: Sterling, VA
Re: Ruining the nostalgia? new [Re: actionhac]
      #6054136 - 08/30/13 10:41 AM

Quote:

I have a feeling what happened the Telrad struck something and was ripped from the tube. The tube covering skin let go rather than the tape. The tube skin was then "grafted" back on with glue, probably between tears and passing in and out of consciousness by someone and it left the Telrad at such an angle that it was not possible to align it with the telescope.
I cut away all the mess and painted the area with a closely matching paint, I will try and sand the fuzzies off and recoat in 24hrs. What a disaster.




Really now? Did it affect the optics? Of course not. Look at it as more of a "war wound", something to be appreciated in the future.

PS, there's always duct tape. Perhaps we will one day find a place in our collective hearts for a good, beater telescope, like many motorcycle enthusiasts have for Rat Bikes.

Edited by bierbelly (08/30/13 10:43 AM)


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Chuck Hards
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Reged: 05/03/10

Loc: The Great Basin
Re: Ruining the nostalgia? new [Re: bierbelly]
      #6054285 - 08/30/13 11:55 AM

Quote:

Look at it as more of a "war wound", something to be appreciated in the future.

PS, there's always duct tape. Perhaps we will one day find a place in our collective hearts for a good, beater telescope, like many motorcycle enthusiasts have for Rat Bikes.




Good observation.

The very first "classic" Dob I built, circa 1982 or so, was a 10" f/5.6 built around a Coulter mirror. Cardboard tube, plywood box. That scope was campaigned hard for years before it was just too beat-up to even stay collimated. Didn't matter, it performed just the same as BN right up until the end.
I still have the optics and all the components of that old thing, remounted in a fiberglass scope, but there are times when I miss it in it's original configuration. I never had to worry about scratches or dings when using it.


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Ravenous
sage


Reged: 11/14/09

Loc: UK
Re: Ruining the nostalgia? new [Re: youngamateur42]
      #6054360 - 08/30/13 12:38 PM

I see a few people have mentioned the Rigel Quikfinder. I use one on my scope (70mm short refractor) quite often - I use a few big rubber bands to hold its shoe onto the dew shield, so no mess. It's also pretty light weight so holds there OK. I its window stands a reasonable distance from the tube, so it's about as neck friendly as a straight through arrangement can get.

I've never tried the telrad, but I gather it's heavier... though cable ties will do of course.

Alternatively, I wonder if you could get a single tube ring to fit your RV-6, paint it nicely, and fit it at the front of the tube. Then somehow put a 50mm finder and rings onto that... it would be pretty solid and should come off easily...


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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Ruining the nostalgia?- A noninvasive fix new [Re: Ravenous]
      #6056013 - 08/31/13 12:59 PM Attachment (4 downloads)

Here's a simple non-invasive fix that I used on my vintage 6inch F4.5 reflector. The Telrad base has dense felt strips stuck to the Telrad tape. The Telrad base is held in place with 18 inch zip ties. Two were strung together for each band. It's quite firm, easily adjustable and just as easily removable without harm to the tube.

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terraclarke
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: terraclarke]
      #6056015 - 08/31/13 12:59 PM Attachment (4 downloads)

2

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terraclarke
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: terraclarke]
      #6056017 - 08/31/13 01:00 PM Attachment (8 downloads)

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roscoe
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: terraclarke]
      #6056119 - 08/31/13 01:42 PM

Here's a quick method I've used on a couple of scopes I've fixed up, one 60mm in particular that comes to mind, that had plates bolted to the sides for its original yoke mount. When I mounted it on a small GEM mount, I merely put short bolts in the holes with nuts on the inside. the bolts hid the holes, the repair looks pretty normal, and was much easier than bondo and a repaint of the tube.

For a cardboard disaster like Robert's, I'd prime it, as he has, sand it, fill it with sandable spackle, sand it with sandpaper on a wood block, and repaint it. Then, I'd mount a new finder over the repair, to camoflage it............
R


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roscoe
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: terraclarke]
      #6056132 - 08/31/13 01:47 PM

Terra,
Looking at your photo, there's a spider bolt showing inside the end of the base plate, and what looks like a hole in the plate under the zip-tie. What about moving the plate forward, and replacing the existing spider bolt with a longer one that also holds the plate?
R


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terraclarke
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: roscoe]
      #6056381 - 08/31/13 04:37 PM

There are four drilled holes for a finder that are under the Telrad base. If I like using the Telrad instead of the finder I can drill the Telrad base and bolt it on using the existing holes that are in two pairs, each hole in the pair ~1 3/4 inches apart and each pair about 5 inches apart. It will fit perfectly. I was just showing a non-invasive solution to the OP and a temporary fix for myself.

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Bob Myler
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: terraclarke]
      #6056467 - 08/31/13 06:07 PM

Terra's clever use of zip ties might prove useful with the mounting of Classic finder scopes.

Worried the metal adjustment screws will mar the finish of your tube? Wrap a zip tie under them....


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actionhac
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: Bob Myler]
      #6056594 - 08/31/13 07:36 PM Attachment (4 downloads)

Damage has been repaired. That was a BIG headache fixing that mess. I have another scope with a cardboard tube and it has a taped on Telrad AND IT WILL REMAIN THAT WAY for eternity.

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actionhac
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: actionhac]
      #6056599 - 08/31/13 07:41 PM Attachment (3 downloads)

I have a few small screw holes up near the big hole and I decided to use one of them for a Rigel. The Rigel weighs nothing so it doesn't upset balance on fixed tube mountings like Edmund and early dobs with small bearings like this one. Notice I used self-adhesive felt on the bottom of the base to prevent marring the tube finish.
This Orion is a wolf in sheep skin. It might look like a cheapy dob from the dollarama but its not it was made by Discovery Telescopes here in the states for Orion back in the early 90's. It may have been Pirate Instruments before Discovery Telescopes.
http://www.ostahowskioptics.com/ABOUT.HTM


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terraclarke
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: actionhac]
      #6057452 - 09/01/13 11:17 AM

Great repair job Robert. I hear you with that tape. I don't think there is any getting it off, even a painted metal tube without some repercussions. At least if it has been on very long. I had a red dot finder attached to a painted Stellarvue focuser some years ago and when I removed it, it took a coat of paint off with it, permanently marring the finish.

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actionhac
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: terraclarke]
      #6160783 - 10/27/13 01:56 PM Attachment (4 downloads)

I have been using my C8 on a Unistar lately so I already ruined the nostalgia somewhat.
What I did next was install a Telrad and I suppose that was the last nail in the nostalgia coffin. But I did create a super nice grab and go system for the winter months.
If you do defork any of the old Celestron CATs look at my finder mount idea presented here.
I used one of the fork bearings and cut a block of wood:


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actionhac
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: actionhac]
      #6160791 - 10/27/13 01:59 PM Attachment (2 downloads)

The block of wood fits on the fork bearing and is held in place by a washer and screw.

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actionhac
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: actionhac]
      #6160800 - 10/27/13 02:02 PM Attachment (3 downloads)

The Telrad base is screwed to the block. Or any finder or rings or whatever you dream up.

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actionhac
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: actionhac]
      #6160805 - 10/27/13 02:04 PM Attachment (3 downloads)

Here it is installed on the tube. Its location is perfect and does not risk damaging the telescope finish.

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actionhac
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Re: Ruining the nostalgia?- A noninvasive fix new [Re: actionhac]
      #6160812 - 10/27/13 02:06 PM Attachment (4 downloads)

Other side with the factory optical finder, which I prefer over the Telrad. I also like having a Telrad so having both is great.
I like this set up but I will probably return it to its original fork (in the spring) because tracking will be missed. I did not alter any parts, I can return it to its past form and no evidence of my work will remain.


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