- T-2/90 ° diagonal prism (BaK4 glass) with 35mm free aperture terminal objective side: 2 "or 1¼"
- Connection eyepiece: 1¼ "
- Prism made in accordance to Zeiss-norms, multi-coated, solid metal case, both sides T-2 connection threads, resulting in extremely short design and adaptable to each telescope system.
- Not just the housing is significantly better and the prism is greater, also the planarity and the conformality of the prism faces are about 5x better than standard prisms in plastic housings.
T-2 Star diagonal prism (Zeiss prism) - with male/female T-2 thread
The telescope side of all our T-2 diagonals accepts an entire armada of Baader-adapters, be it for 1 1/4" or 2"focusers or for a Celestron OTA 2" thread or an original M44 Zeiss thread, there are also adapters for Vixen OTA's or russian MAK's.
On the eyepiece side many people put only our quick change ring, item #2456320, in order to mount the Mark V binocular viewer instead of an eyepiece, this will achieve the shortest possible backfocus distance between telescope and binocular viewer - alternatively mount the 1 1/4" CLICKLOCK- eyepiece clamp (#2458100), for the quickest clamping action in the industry.
Our three T-2 diagonals all were based on the design of the famous Zeiss M44 Star Diagonal which featured the same versatillity with the body itself being adaptable onto almost everything within the Zeiss M44 system of telescope accessories. We try to provide the same versatillity within our brandmarked ASTRO T-2 System(TM).
One of the features of the T-2 diagonals - be it prisms or mirrors - is the large free aperture and the flexibillity to directly adapt onto almost any telescope system - without the bottleneck of a 1 1/4" barrel size which may cause vignetting in long focal length 1 1/4" eyepieces or when working with a bino viewer on top of the diagonal. Exactly this is the reason why we offer the body of all our T-2 System diagonals without adaptors ( Of course - it can be adapted just alike all the other diagonals by using our standard T-2 / 1 1/4" nose piece #14 (#2458105), but then some of it's beauty [clear aperture !!] is left unused..).