after reading some information on the web, I still do not understand the difference between the TLS APO and DCB II.
It seems that TLS APO will couple with DSLR camera that make the ATX become a telephoto lens. The DCB II couples with a DC "afoucally" so that the whole ATX with the Objective and Eyepiece combination becomes an lens with much longer effective focal length. The DCB II is what I want (I already have a 800mm lens and require a system with longer effective focual length, say, 2000mm or more).
However, some information on the web says that the TLS APO could also combine with mirrorless camera. I am very interest in this.
Just do not know where in HK I could see demo to answer my questions!
Vignetting is a common problem for afocual systems and it could solve easily by using the right combination of eyepieces and camera lenses.
[ Last edited by passerby-b at 5/04/2014 22:03 ]
