The
William Optics Flattener 4 is set to start shipping again. Apparently the first batch which triggered a redesign had an element reversed or something.
Anyway, I'm biting the bullet and ordering one to try on the Megrez 90 and FLT 98. I'll report back on my results and a comparison to the Flat III and Borg flattener as well, once I have done some testing.
The new design is no longer a reducer, just a flattener.
They have posted
this image and
this image on their web site, taken with a FF4 and FLT 98. As the second was taken at Coona, I am curious the person who took it is a member here