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Thread: Should I referb this scope more?

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    Default Should I referb this scope more?



    Stats for the homemade reflector

    Focal length 1400mm approximate Aperture 200mm F/7 Mirror 1.25 inch Edmond style focuser. Standard 1.25 secondary mirror. Photos of the current configuration. This scope was made in the late 1960's and it has a hand ground mirror that was recoated about 6 years ago. I am open to suggestions as to how to upgrade the focuser and what model and style to use. Currently it is hard to collimate as the laser does not center in the primary but it can be adjusted so that the laser does center in the eyepiece. Overall a great scope that can be better. I would like to get suggestions and ideas for updating and enhancing this 1969 home made scope. Everything in it is currently 1.25 Edmond style 1.25 as the photos show. This scope is already really good but why not improve it.....
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    Default Re: Should I referb this scope more?

    Quote Originally Posted by dagadget View Post
    Stats for the homemade reflector

    Focal length 1400mm approximate Aperture 200mm F/7 Mirror 1.25 inch Edmond style focuser. Standard 1.25 secondary mirror. Photos of the current configuration. This scope was made in the late 1960's and it has a hand ground mirror that was recoated about 6 years ago. I am open to suggestions as to how to upgrade the focuser and what model and style to use. Currently it is hard to collimate as the laser does not center in the primary but it can be adjusted so that the laser does center in the eyepiece. Overall a great scope that can be better. I would like to get suggestions and ideas for updating and enhancing this 1969 home made scope. Everything in it is currently 1.25 Edmond style 1.25 as the photos show. This scope is already really good but why not improve it.....
    Attached Thumbnails
    It is such a rare bird that you might be better to leave it stock. If you do decide to upgrade maybe try to not mod it to the point that it can't be returned to stock easily? Older Meade focusers look like it might fit that bolt spacing on that edmund focuser. 1800 Destiny makes some decent replacement spiders amd holders for a new secondary. Very cool scope. I've been watching this one since you found it.
    Last edited by Leveye; 02-13-2018 at 03:53 PM.
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    1984 Meade 2120 10" SCT- 1998 U.S.A. made Celestron C8 SCT -StellarVue SV80ED Doublet- 1960's Homemade 6" F5.6 Newt - Astro Tech AT8IN Imaging Newt- Vintage 1961 H.O.C. made ATCO 80mm/1200mm refractor w/ original vintage eyepieces - 20x70 Orion Little Giant II binoculars w/ original 1997 Virgo SkyMount Parallelogram-Zhumell, Orion, Astro Tech 9x50 finderscopes - Orion Atlas AZ/EQ-G iOptron Skyguider Pro Unmodded Canon 5DMKiii - Modded Canon 700D/ T5i- ZWO ASI178MC CMOS - Meade DSI II Mono CCD APT-DSS-PHD-CDC-PS-LR


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    Default Re: Should I referb this scope more?

    Quote Originally Posted by Leveye View Post
    It is such a rare bird that you might be better to leave it stock. If you do decide to upgrade maybe try to not mod it to the point that it can't be return to stock easily? Older Meade focusers look like it might fit that bolt spacing on that edmund focuser. 1800 Destiny make some decent replacement spiders amd holders for a new secondary. Very cool scope. I've been watching this one since you found it.
    Yes I agree I want to enhance it but also allow an easy return to the original specs. The finder scope is very dark and is essentially almost useless but it does look good. Also rebalancing the scope would be an issue but there are work around methods for that.
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    Default Re: Should I referb this scope more?

    I can't imagine a reflector finder(so cool!) being too dark? Can you use a better eyepiece with it?
    My eyes
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    Default Re: Should I referb this scope more?

    Quote Originally Posted by Leveye View Post
    I can't imagine a reflector finder(so cool!) being too dark? Can you use a better eyepiece with it?
    I do not think I can change that but I will look and see. Presently the scope is at our star party site for this Saturday's party here in Central Florida I will have three scopes there and this one will probably get some attention.
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    Default Re: Should I referb this scope more?

    Might think about a telrad or a Rigel Quickfinder to supplement your finder scope. An 8x50 RACI would be a nice addition (in my mind, given my observing methods), but it's all about what you like, David, and what works best for you.

    The GSO Crayfords are nice focusers for a dob. They aren't terribly light in weight, though. Agena Astro and Scopestuff sell them.
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    Default Re: Should I referb this scope more?

    Quote Originally Posted by bladekeeper View Post
    Might think about a telrad or a Rigel Quickfinder to supplement your finder scope. An 8x50 RACI would be a nice addition (in my mind, given my observing methods), but it's all about what you like, David, and what works best for you.

    The GSO Crayfords are nice focusers for a dob. They aren't terribly light in weight, though. Agena Astro and Scopestuff sell them.
    I have a Rigel here already so that could go on easy enough the GSO's look nice and a 1.25 would rock on this scope. A 2 might cut down on the scope and the resolution would change but I could try it anyway..... Going to get some opinion at the star party Friday night or Saturday on this scope and what to do with it.
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    Default Re: Should I referb this scope more?

    HI David. I agree with all of the above. I too recommend the Destiny curved vane spiders, and if they don't have an exact replacement, they can fabricate one for you, based on the measurements that you supply.
    1800 Destiny On Line Store for Curved Vane Spiders
    And, Manish at AgenaAstro Products can probably set you up with a nice Crayford replacement focuser.
    https://agenaastro.com/parts-accesso...cessories.html
    Now, top it all off with a 8x or 9x by 50 RACI or Rigel finder scope, and now you're really in business. I hope this helps David, and thanks for your excellent photos.
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    Default Re: Should I referb this scope more?

    Quote Originally Posted by Makuser View Post
    HI David. I agree with all of the above. I too recommend the Destiny curved vane spiders, and if they don't have an exact replacement, they can fabricate one for you, based on the measurements that you supply.
    1800 Destiny On Line Store for Curved Vane Spiders
    And, Manish at AgenaAstro Products can probably set you up with a nice Crayford replacement focuser.
    https://agenaastro.com/parts-accesso...cessories.html
    Now, top it all off with a 8x or 9x by 50 RACI or Rigel finder scope, and now you're really in business. I hope this helps David, and thanks for your excellent photos.
    Going to look at the links you provided this might get interesting quickly. The links are nice and show the vanes and also the Crayfords. It will be rather interesting to see exactly what is needed but it does give me a good starting point.
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    Default Re: Should I referb this scope more?

    Hi again David. I should add that the Destiny Curved Vane spiders are an excellent upgrade for a modern reflector, a great source for a do it yourself "home brew" builder, and perfect for refurbishing and older scope. Plus, you get the advantage of the fact that the geometry of the curved vanes almost completely eliminates the diffraction spikes you get with the straight vanes. Also, I know that Manish at Agena Astro Products, uses a local (to him) machine shop to customize or modify his products to fit properly for the customer. Give these folks a call, and see if they can help you.The very best of wishes on your refurbishing project David, and keep us posted on your progress.
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