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+--- Thread: A deal for amateur telescope makers? (/showthread.php?tid=120070)
A deal for amateur telescope makers? - freeradical - 07-13-2011
128 mm F5 achromatic
http://www.surplusshed.com/pages/item/l10608j.html
Re: A deal for amateur telescope makers? - Trouble - 07-13-2011
I see that and I think of one thing
[spoiler]
Burning ants!
[/spoiler]
Re: A deal for amateur telescope makers? - freeradical - 07-13-2011
Well, $265 is a lot of money to toast a few ants.
Seriously though, this is obviously nowhere near the quality of an apochromatic lens, but you don't have to give up your left nut to buy it either.
Edit: I am kind of amazed that it's an F5 lens. Normally lower end lenses have a high focal ratio to overcome chromatic and spherical aberration.
Re: A deal for amateur telescope makers? - space-time - 07-13-2011
I usually pat that price for 50mm diameter achromats from thorlabs, so this seems like a good price
Re: A deal for amateur telescope makers? - Paul F. - 07-13-2011
Been a long while since i kept up on telescope parts, but I think that's a steal!
I also think F5 is awfully short for a refractor... Probably would get a smaller "sweet spot" in the middle, with fringing on the edges... But compared to the last prices I remember for a big front lens for an achromat refractor, it would be worth it for a nice first project.