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What did you do to your Scope/Mount Today?

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#6251 Kasmos

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Posted 29 August 2021 - 02:25 AM

I like those mounts, and there are similar designs from different manufacturers.

 

  I have a Tasco 7TE-2 and a 7TE-5 mount.  Their RA gears are different a there are a couple minor differences in them.

 

Here is my Selsi 247 mount, that is for a 80x910 scope:

 

attachicon.gifSelsi 247 mount a.jpg

 

Here is the mount from an ATCP 1254, 80x1200:

 

attachicon.gifATCO 80 mount 1.jpg

 

In comparing the ATCO and Tasco mounts that I have they have the same dimensions, but on the Selsi, it is wider where the two levers tighten.

 

But, what is the actual name or design of these mounts?  Is there one?

Those are nice.

 

I've alway thought it's interesting how similar so many of them are, yet when you look closely, so many small differences.

(I suppose you could say that about other components, like focusers, and finders)

 

Maybe we could use a thread showing them and their differences?

(or maybe all classic GEMs just for fun)...have we done that?

 

This style seemed to have a period of years when it was 'the standard' (late 50's to late 70s?)

What brand, model, maker of scope was the first...and what was the last model and year of telescope with one?

You even see this style on some Vixens and Mizars up until maybe just shy of 1980.


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#6252 DAVIDG

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Posted 29 August 2021 - 11:01 AM

 I have had my 4.25" f/ 11 "Palomar Jr" for years. It is  one my favor scopes. It has been living on my back porch ready to go when the sky is clear. Jupiter and Saturn have been great in it.

     If you have a  clean sphere at 4.25"  and f10 the  poly chromatic  Strehl ratio is a true 1/8 wave.  That is better then  most telescope out there. So it  is a "sleeper" when it comes to great views for inexpensive price and this is why people report great images with them when they are made correctly. 

   I got this scope maybe 25 years ago from a club member  and I believe it was assembled from parts and not a true Palomar Jr. For one  thing the mirror is F/11 and not F/10. 

   Over the years I have been improving it. One of the biggest improvement is to replace the garbage diagonals that Edmund used. Most are around  1/2 wave or worse. I replaced the original which was trash with one I had that was better then 1/4 wave. Last Winter I refigured the primary which was a sphere but had a hole in the middle of the figure that wasn't fully masked by the diagonal. The figure is now a parabola that took three tries to get right. It is very easy to over correct a slow mirror like this.

   The image are wonderful in the scope. It shows beautiful Airy disk and splits tough doubles with ease.  I still wanted to  replace the diagonal and the holder that was in the scope with an smaller elliptical one and  a better holder. 

    With Stellafane over I had some time to make a new single blade spider and to hold a 0.75" MA diagonal. When I refigured mirror I also refigured  the diagonal since it had typical figure that was around 1 wave to one that is flat  to a 1/10 wave.

   The new holder and smaller diagonal should farther improve the the image quality and contrast.  Here  are some pictures of the new holder, the old holder and diagonal and the new diagonal after I refigured showing the straight interference fringes. I will replace the copper wire with stainless steel pin.  

   I made the new spider from  the steel banding that is used to wrap around packages , a  hex nut extension and piece of oak dowel cut off at 45 degrees. 

 

                   - Dave 

 

old palomar jr diagonal.jpg

 

new palomar jr diagonal.jpg

 

new palomar jr diagonal spider.jpg


Edited by DAVIDG, 29 August 2021 - 04:46 PM.

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#6253 clamchip

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Posted 31 August 2021 - 12:16 PM

My 'University Optics 8 inch reflector kit' telescope came with most of a

Tuthill Super Finder, you can see it here in this photo, the red plastic job

with flat black paint.

My mission is to remove the paint without dissolving the plastic finder.

I've read the red plastic finder body is translucent and many amateurs

painted over it. 

I have a shop full of solvents and misc paint strippers. I'll say a few prayers

and start with the weakest.

If I can save it I would like to put it on my orange C8 where it belongs.

Robert

If you would like to see a 1980 Tuthill catalog, here:

https://www.cloudyni...er-celestron-8/

 

post-50896-0-27781200-1495664785_thumb.jpg


Edited by clamchip, 31 August 2021 - 12:52 PM.

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#6254 icomet

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Posted 31 August 2021 - 01:46 PM

Orion secondary mirror amputation.

 

Clear Skies.

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#6255 Vesper818

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Posted 31 August 2021 - 04:31 PM

I unwrapped a box from Japan! 😍😍😍
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#6256 tim53

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Posted 31 August 2021 - 04:56 PM

My 'University Optics 8 inch reflector kit' telescope came with most of a

Tuthill Super Finder, you can see it here in this photo, the red plastic job

with flat black paint.

My mission is to remove the paint without dissolving the plastic finder.

I've read the red plastic finder body is translucent and many amateurs

painted over it. 

I have a shop full of solvents and misc paint strippers. I'll say a few prayers

and start with the weakest.

If I can save it I would like to put it on my orange C8 where it belongs.

Robert

If you would like to see a 1980 Tuthill catalog, here:

https://www.cloudyni...er-celestron-8/

 

attachicon.gifpost-50896-0-27781200-1495664785_thumb.jpg

First tpaint remover I'd try would be one sold in a plastic bottle. I think the citrus-based removers would work well on that finder, and could be rinsed off with water.


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#6257 clamchip

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Posted 31 August 2021 - 06:15 PM

I ended up using Jasco Paint and Epoxy Remover, the really harsh stuff.

I tested on a inconspicuous spot and the only solvent that tried to attack the plastic is Acetone.

Every other solvent was ok even Lacquer Thinner. 

The paint remover seemed the most effective so I used it.

The finder plastic reminds me of fiberglass resin.

Robert

 

IMG_0464.jpg


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#6258 Terra Nova

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Posted 01 September 2021 - 10:43 AM

I ended up using Jasco Paint and Epoxy Remover, the really harsh stuff.

I tested on a inconspicuous spot and the only solvent that tried to attack the plastic is Acetone.

Every other solvent was ok even Lacquer Thinner. 

The paint remover seemed the most effective so I used it.

The finder plastic reminds me of fiberglass resin.

Robert

 

attachicon.gifIMG_0464.jpg

Nice job Robert! I’m surprised the lacquer thinner didn’t have the same effect as acetone, I always thought both lacquer thinner and nail polish remover contained the same active ingredient- Acetone. I guess not. I gotta say tho that I really despise those finders! I bought an orange C8 some years back that came with one. It went by the wayside long before the C8! I miss neither.

 

PS- Those red plastic Tuthill finders always reminded me of a cheap dime-store toy. The kind that would be found in a crinkly plastic bag, hanging on a rack at the end of the bin! (I can say dime-store in this forum, because us folks here are,old enough to remember what a dime-store (AKA, five-and-dime) was. lol.gif


Edited by Terra Nova, 01 September 2021 - 10:47 AM.

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#6259 clamchip

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Posted 01 September 2021 - 11:17 AM

Nice job Robert! I’m surprised the lacquer thinner didn’t have the same effect as acetone, I always thought both lacquer thinner and nail polish remover contained the same active ingredient- Acetone. I guess not. I gotta say tho that I really despise those finders! I bought an orange C8 some years back that came with one. It went by the wayside long before the C8! I miss neither.

 

PS- Those red plastic Tuthill finders always reminded me of a cheap dime-store toy. The kind that would be found in a crinkly plastic bag, hanging on a rack at the end of the bin! (I can say dime-store in this forum, because us folks here are,old enough to remember what a dime-store (AKA, five-and-dime) was. lol.gif

I feel completely the same way about sticking that plastic maggot on my beautiful C8 ! 

All I can say is it better be a Super Finder !

 

Robert


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#6260 clamchip

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Posted 01 September 2021 - 12:40 PM

Okay here it is!

I like the way it mounts close to the main telescope.

And I like the two-point alignment, and fine focus eyepiece, and it's 50mm.

The color is growing on me...

Robert

 

IMG_0466.jpg


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#6261 Terra Nova

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Posted 01 September 2021 - 01:47 PM

Okay here it is!

I like the way it mounts close to the main telescope.

And I like the two-point alignment, and fine focus eyepiece, and it's 50mm.

The color is growing on me...

Robert

 

attachicon.gifIMG_0466.jpg

Was it made by Hasbro, Mattel, Tyco, or Playskool? :lol:


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#6262 Kasmos

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Posted 01 September 2021 - 02:15 PM

I felt the same about those Tuthill Red Plastic products. They always seemed cheap looking and out of place on a Celestron. I'm somewhat warming up to them only because they now look old school. Kind of like other ugly things that have become classic. Not that I think they have grown attractive an Edzel comes to mind. When I was very young I actually referred to them as "throw up cars" because the grill looked like it was vomitting and made me want to.  


Edited by Kasmos, 01 September 2021 - 02:26 PM.

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#6263 tim53

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Posted 01 September 2021 - 05:20 PM

Was it made by Hasbro, Mattel, Tyco, or Playskool? lol.gif

or Remco?


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#6264 tim53

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Posted 01 September 2021 - 05:22 PM

I felt the same about those Tuthill Red Plastic products. They always seemed cheap looking and out of place on a Celestron. I'm somewhat warming up to them only because they now look old school. Kind of like other ugly things that have become classic. Not that I think they have grown attractive an Edzel comes to mind. When I was very young I actually referred to them as "throw up cars" because the grill looked like it was vomitting and made me want to.  

This one wouldn't, especially if it were *yours* and you realized how rare it is:  http://www.misterw.c...nvertible01.jpg


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#6265 tim53

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Posted 01 September 2021 - 05:24 PM

Roger Tuthill must have come across some casting resin that he liked (or got in huge batches for cheap), because he made lots of stuff with it for the amateur community.  He was a very nice gentleman.


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#6266 Kasmos

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Posted 01 September 2021 - 07:22 PM

This one wouldn't, especially if it were *yours* and you realized how rare it is:  http://www.misterw.c...nvertible01.jpg

A '60 is a whole other animal (for the good) and since our family car was a '60 Galaxy  2 door club sedan I have a bias towards it. In addition to the Sunliner convertible, the Starliners  fastbacks were really cool.

 

Starliner: 

 

https://www.wallpape...3A_classic.html

 

Galaxy, Sunliner, and Starliner, ya got to love those space age astro related names


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#6267 Kasmos

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Posted 01 September 2021 - 07:35 PM

Roger Tuthill must have come across some casting resin that he liked (or got in huge batches for cheap), because he made lots of stuff with it for the amateur community.  He was a very nice gentleman.

I was thinking the same thing.

 

BTW, Instead of the various toy makers, perhaps it's more along the lines of Ronco/Popeil. If only he had come up with the Pocket Astronomer. grin.gif



#6268 Terra Nova

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Posted 01 September 2021 - 07:51 PM

A '60 is a whole other animal (for the good) and since our family car was a '60 Galaxy  2 door club sedan I have a bias towards it. In addition to the Sunliner convertible, the Starliners  fastbacks were really cool.

 

Starliner: 

 

https://www.wallpape...3A_classic.html

 

Galaxy, Sunliner, and Starliner, ya got to love those space age astro related names

I loved the old Ford Fairlane 500 Skyliners of the late 1950s!

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#6269 Lentini

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Posted 01 September 2021 - 09:46 PM

Today I got accessories to mount my new-to-me Tak TS-65…

 

Baader adjustable rings

 

Svbony clamp

Losmandy 14” rail

 

(also a Borg 1.25” adapter)


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#6270 clamchip

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Posted 02 September 2021 - 12:23 AM

I feel completely the same way about sticking that plastic maggot on my beautiful C8 ! 

All I can say is it better be a Super Finder !

 

Robert

It is a Super Finder, Tuthill named it appropriately.

I don't think I've ever looked through a better finder.

The only thing that needs improving is I need crosshairs, the field is very wide.

The red plastic, well I'm going to live with it.

Robert

 

IMG_0468.jpg


Edited by clamchip, 02 September 2021 - 12:26 AM.

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#6271 clamchip

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Posted 03 September 2021 - 08:13 PM

The above 1975 sandcast C8 had some play in the focuser.

Lots of take up, you would turn the knob say CW, and when you reversed

direction there about a quarter rotation of the knob before something would

happen in the eyepiece.

I thought the play was coming from the mirror carrier focuser linkage but I

guessed wrong.

To fix the problem you adjust thrust surface A down threads B until you have

eliminated the end float. I left just enough room for grease and no more.

This made the focuser move like the day it was made.

Robert

 

IMG_0471.jpg

IMG_0472.jpg

post-50896-0-63322700-1549669136_thumb.jpg


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#6272 clamchip

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Posted 04 September 2021 - 05:27 PM

If the mere thought of sticking a Telrad base on your C8 with double-sided foam

tape makes you cry out for nurse Mendy and her defibrillator here's what I did. 

I borrowed a fork bearing and made a wood block to screw the Telrad base to, works great.

Even though I have my tube sideways on a one arm alt/az you could adapt the idea to other scopes.

If your telescope is mounted to the  fork you can use the Celestron

accessory camera mount. Robert

 

IMG_0474.jpg

IMG_0473.jpg

post-50896-14074259900717_thumb.jpg

post-50896-14074259899031_thumb.jpg


Edited by clamchip, 04 September 2021 - 05:55 PM.

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#6273 Terra Nova

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Posted 10 September 2021 - 01:12 PM

A house is not a home without a Unitron on display, (at least for me). I’ve been having a lot of painting, and remodeling done at my house and doing some redecorating and I decided that it was time to put my classic 62mm Unitron model 114 from 1956 back up on display. In case the purists are wondering, yes, the stock polished aluminum finder is on it, it’s just out of view. All of my scopes are for using and to make my Uni a bit more functional, I’ve supplemented the original finder with a Qwik Point RDF. It isn’t permanently affixed to the tube and makes the little scope much easier to use. I’m debating about putting the Unihex on it for display.

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#6274 ccwemyss

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Posted 11 September 2021 - 11:00 PM

I built a new pedestal for my AP 706 mount. The RV-6 legs came from a nearby CN'er. The tube is 4" aluminum pipe. The head is another piece of pipe, about 8" long, that just fits in the end of the 4" pipe (I superglued on some thin brass shims at the bottom edge to take out play), and a piece of 3/8" aluminum that I cut into a circle with the bandsaw. I drilled a dozen holes through the plate, into the end of the short pipe, tapped the portion in the pipe, enlarged and countersunk the ones in the plate, and bolted it on (this would have been simpler to weld, I know, but I don't have a welding rig, and neither of my local shops were interested in doing the job). 

 

At 48", the new pedestal is a foot shorter than the original, which always put the eyepiece too high for anything lower than about 40* elevation. Being lower will make it easier to load and unload scopes, too. This one also allows adjustment in azimuth (the one from AP is adjusted by kicking the feet), with three knobs to lock it in place. Everything is aluminum and stainless, unlike the plain steel of the original, which rusts if left out. And it's lighter.

 

Looking forward to testing it. I doubt it will be as stiff as the design with the steel tensioning rods, but I think it should be usable for observing evenings at school. 

 

Chip W. 

 

Pedestal - 1.jpeg

 

Pedestal - 2.jpeg


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#6275 icomet

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Posted 15 September 2021 - 01:26 PM

I loved the old Ford Fairlane 500 Skyliners of the late 1950s!

Maybe your Ford gassed up here. (I took this photo)

 

Clear Skies.

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