RE: [APML] long fl camera lens recom?

[Alan Jones <ajones@apexsupply.com>]

> Gene's right; good camera lenses aren't cheap and the short 
> FL telescopes
> can do better. I had an excellent Sigma 400mm f/5.6 APO lens 
> once. Sharp to
> the edges. It had a bit of color but that was the only 
> problem. You might
> find one used for about $250.00

Bobby,

Now I'm confused.  I thought most inexpensive short fl scopes (i.e. <$1,000)
suffer from coma and chromatic abberation <sp?>.  To get one with good color
correction and a flat field you would need a $2,500 TV/AP/Tak and field
flattener.  I have a OM-1 as my astrophoto body.  There's plenty of 400 and
800mm Olympus lens's on the used market for about $400 and $800
respectively.  And of course, there's the Sigmas/Vivitars/Tamrons out there.
I'm sure the Nikons are more expensive but wouldn't these lenses be as good
if not better than a comparably priced scope when you're talking these short
focal lengths?

Alan

--  APML Archives at <http://www.system.missouri.edu/apml/>  ---
                Unsubscribe at <majordomo@seds.org>