Astromart Reviews - William Optics FLT110mm f7 TMB designed ...

Astromart Reviews - William Optics FLT110mm f7 TMB designed triplet and matching field flattener
Photographic performance
http://www.astromart.com/articles/article.asp?article_id=523 (8 of 19)1/6/2007 10:54:28 AM
As mentioned, I am much more into astrophotography than into visual observing, so for me the big question
always is: how does the telescope behave with a CCD mounted ;). Weather so far was not good enough to be
able to do real deep imaging with the telescope, but I will try to update the review as soon as I get those kind of
images.
With the FLT110, I got the brand new TMB designed matching 68mm field flattener. This one comes with two
adapters, one for DSLR (T2 thread) and one ring that ends in SC thread. The latter is a relatively thin ring, so it
does not by itself provide the right spacing needed for best quality results! One should use a 2 inch nose piece
with it and try to aim at the same metal back distance as the DSLR adapter, or replace it with a dedicated
adapter for large format sensors. William Optics told me they will be making an adapter dedicated for the
STL11000.
The DSLR adapter will not introduce vignetting with a 1.5x APS sensor size, but at full frame it vignettes for sure.