[johnt (John)]

Originally Posted by Hans Tucker

It is an Apomax 130mm f/12, with a 3-element objective built by Fred Mrozek. I believe only around 23 were made. My scope is the attached image but here is a review from CN.

http://www.cloudynights.com/item.php?item_id=897

Very interesting Hans, I did not know these scopes existed. Doing a search, I saw that a few sold recently on CloudyNights, and were descibed as "brand new" so I'm guessing that they are recently made.

I have recently bought a Mallincam Xtreme camera for video astronomy and intend using it only with a video screen (not with computer capture for still imaging). However, I believe that your question about the suitability of longer focal lengths is also relevant to video astronomy.