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Equipment Discussions >> Classic Telescopes

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actionhac
Post Laureate
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Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: starman876]
      #5470927 - 10/15/12 02:04 AM Attachment (30 downloads)

I have a few extra pictures you might like....
This 23mm finder is small but perfect in every way. Beautifully made. Helical focus on the objective end and also focus for the retical.


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actionhac
Post Laureate
*****

Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5470936 - 10/15/12 02:11 AM Attachment (28 downloads)

With a little tuning this focuser provides excellent performance.

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actionhac
Post Laureate
*****

Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5470940 - 10/15/12 02:15 AM Attachment (25 downloads)

Anyone know who made these lenses for Edmund?
Later on Edmund made lenses in-house.


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trainsktg
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Reged: 08/23/05

Loc: Pacific Northwest
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5470947 - 10/15/12 02:19 AM

I have the same finder on my 4.25" reflector...its a very nicely designed unit.

Keith


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actionhac
Post Laureate
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Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5470951 - 10/15/12 02:28 AM Attachment (23 downloads)

The only documented information on the source I've found is a 1956 Edmund Scientific Corp. ad stating:

"We found a Japanese optical engineer who designed some excellent astronomical objectives. We place orders with him. He then has these made, testing each one for quality".



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mikey cee
Postmaster
*****

Reged: 01/18/07

Loc: bellevue ne.
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5471273 - 10/15/12 10:56 AM

Robert has this lens ever been apart before? I ask because if the crown is flipped then both arrows point skyward and the "12's" are lined up too. I always thought that arrows pointed to each other but I've since seen some claim both should point in the same direction. Mike

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actionhac
Post Laureate
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Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: mikey cee]
      #5471316 - 10/15/12 11:16 AM Attachment (22 downloads)

Hi Mike.
Edmund sure does stamp a ton of information on the edges, the fine print makes it clearer.
The dark arrows are rotation index marks and point at each other.
This one may be readable:
I guess it isn't. The fine print reads:

FLINT ELEMENT FACES EYE ARROWS POINT TOGETHER (bottom lens in photo)

CROWN ELEMENT FACES OBJECT ARROWS POINT TOGETHER

The faint arrows face each other but are not indexing and the dark (blue 12) arrows are the index marks.


Edited by actionhac (10/15/12 11:32 AM)


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actionhac
Post Laureate
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Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5471363 - 10/15/12 11:38 AM Attachment (21 downloads)

It's quite a feat loading the elements into the cell.
I hang the whole optical tube on the edge of a open door by a finder ring hooked over the top, cell facing the floor and raise the elements into the cell followed by the retaining ring.
The cell cannot be attached to the tube with the lens installed.
I don't have a good picture of the cell only this one:


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mikey cee
Postmaster
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Reged: 01/18/07

Loc: bellevue ne.
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5471949 - 10/15/12 05:36 PM

Well like I said I've always thought that arrows pointed at each other. I guess some do and some don't....'spose I'll just shut up and go with the flow as the flow dictates. Mike

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actionhac
Post Laureate
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Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: mikey cee]
      #5471990 - 10/15/12 05:57 PM

I scratch my head a little every time I read the markings and look at the arrows. It is confusing, or more of a "don't want to do it twice" project.
When removing and installing the elements a very high risk of getting a element cocked sideways in the retainer ring threads exists. If that happens you can end up with a clam chip.
I don't like doing it unless I must. I have my Sam Brown "All About Telescopes" I refer to just to make sure on the arrows.
Otherwise I like the cell, its very light and the focuser+finder is light too so the scope balances near the middle of the tube.

Robert


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Retentive
sage
*****

Reged: 02/16/08

Loc: Florida
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5472378 - 10/15/12 10:07 PM

Awesome telescope. I remember just staring at the catalogue wishing I could have one!

Phil


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actionhac
Post Laureate
*****

Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: Retentive]
      #5850900 - 05/09/13 08:45 PM Attachment (11 downloads)

The past few days I've been working on the 4" Edmund.
I made a wood shelf to replace the normal tin eyepiece tray. I am surprised how much it stiffened up the tripod.


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actionhac
Post Laureate
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Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5850907 - 05/09/13 08:50 PM Attachment (13 downloads)

I changed to a earlier head to get the channel saddle and a better seating for the tube rings.
I painted a few parts on this head back when gray wrinkle was still available. As you can see it has a green tint, I over heated the paint when I dried it in the oven.


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actionhac
Post Laureate
*****

Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5850915 - 05/09/13 08:53 PM Attachment (13 downloads)

This is a good arrangement, the earlier model channel with rings. If you want to use rings. I do right now.

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actionhac
Post Laureate
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Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5850926 - 05/09/13 09:01 PM Attachment (12 downloads)

The shelf is great. Stiffens things up and glowy likes it too. He's getting old and wants a flat surface to stand on. No more climbing tubes at 65 million years of age.
As you can see I got a little carried away adding a light, I'll probably remove it, maybe, we will see. I guess I will see! I might like it !


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actionhac
Post Laureate
*****

Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive new [Re: actionhac]
      #5850929 - 05/09/13 09:03 PM Attachment (16 downloads)

I do like this level!

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Chassetter
sage
*****

Reged: 07/08/09

Loc: New Brunswick, Canada
Re: Mr. Edmund gets a Drive [Re: actionhac]
      #5850950 - 05/09/13 09:23 PM

Yes, but watch out, Glowy may have too much time on his hand now that you've retired hime...he's eyeing that RKE with dinner on his mind! :P Wonderful setup by the way.

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ngc2289
Post Laureate
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Reged: 04/13/05

Loc: Corpus Christi, TX.
Re: Mr. Edmund gets a Drive [Re: actionhac]
      #5851312 - 05/10/13 03:11 AM

A 1" Edmunds drive will also work on a 1" Jaegers mount. I had the 1" Jaegers mount, and put an Edmund drive on it.

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actionhac
Post Laureate
*****

Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive [Re: ngc2289]
      #5851822 - 05/10/13 11:21 AM

My first Edmund telescope years ago had the opposite, a Jaegers drive on a 1" Edmund and it did fit fine.
I sure liked the Jaegers 6" cast aluminum setting circles I had on that scope.

Robert


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actionhac
Post Laureate
*****

Reged: 08/09/08

Loc: Seattle
Re: Mr. Edmund gets a Drive [Re: actionhac]
      #5851862 - 05/10/13 11:46 AM Attachment (17 downloads)

Anyone ever wonder what the 3 holes in the worm gear are for? as near as I can tell its for this kit:

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