Re: [ATM] Edmund Optics "Techspec" brand achromat: suitable lens for small refractor?

[Jeff Rowe <jeffrowe@austin.rr.com>]

David;
I can't comment on Techspec lenses from experience, but I imagine they 
would work fine for your purposes. Here are a couple of links to some 
similar products that might work as well at lower cost, some already 
have lens cell mounts. I have not done a side by side comparison between 
these products. Anchor is a division of Edmunds. I have no commercial or 
sales interests in these companies. Enjoy building this scope, I'll bet 
you'll be grinding mirrors in the near future :)

http://www.surplusshed.com/pages/category/objectivelenses_1.html
http://www.anchoroptics.com/catalog/product.cfm?id=257

Good luck and have fun
Jeff Rowe

David Weinshenker wrote:

>Hello, all -
>I'm looking at some "Techspec" achromatic 
>lenses listed in the Edmund Optics catalog,
>such as #M45-419: 75 mm D x 400 mm FL ($147 ea.).
>
>Can anyone comment on the optical quality of 
>this brand of lenses, with respect to use as
>the primary lens of a small telescope? (The
>plan would be to install the lens on a handmade 
>tube assembly, with an off-the-shelf focuser
>and eyepieces.) Would I be wasting time with
>these lenses (as far as ending up with anything 
>worth having as a telescope), or could this
>combimation potentially yield a decent little 
>telescope, good for looking at stuff while I 
>tinker with more complex ideas, or possibly
>as a finder/guide scope for some future larger
>instrument?
>  
>

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