Did someone say long FL refractor?

[MortonH]

5" f/20 scope on Astromart. Tube is 10 feet long!

http://www.astromart.com/classifieds...fied_id=849883

[AG Hybrid (Adrian)]

Yeah.... You should get to a point where you need to decide to either buy a triplet APO or a Mak-Cass if you want color correction and or long FL.

Judging by those pictures if you pointed towards zenith, you would be looking through the eyepiece while on your belly.

[glend (Glen)]

Whow, the CA should be almost non-existent at that length.
Agreed it needs a taller tripod but a pier in a proper obs might be better.

[LewisM]

Needs a perimeter fence around it for when it slews to new targets, with warning tape

I reckon Kunama's FC76 might get that long by the time he's done Only a matter of time till he adds the 2x extender section (sorry Matt, couldn't resist)

[Hans Tucker (Hans)]

My f/12 APO is an enough of a handful.

[pgc hunter]

I want it. But doing the math, it is nearly twice as long as a 4" F/15 and I thought those were loooong

[mr bruess]

longer than a Unitron refractor.Could it outperform a unitron?