After machining a proper spacer, this corrector works well with my 4 inch f-4 with my camera but it Still has a small residual coma probably because it’s not optimized for such a short focal length but it turned my scope into a good little astrograph. I do recommend it.
hi. the compaines that make this adapter dont know how to make them usable.. the SCT female thread depth will not screw on this adapter so that it is TIGHT!!! i have used them but have to cut a 2" pvc spacer about 0.1" long to fit inside the SCT ring.. then it will tighten up against the adaapter. very poorly designed.
A magnified coma corrector (different model) did not work very well. This one works quite well for prime focus photography. Using this coma corrector along with a barlow to increase magnification did not prove successful. This is a prime focus, wide-field solution, and it works well for that purpose. Use a laser collimator, also.
There is an excellent review of the Baader MPCC Mark III in the May-June 2014 issue of Astronomy Technology Today. A key point made there: The camera end of the Mark III comes native with an M48 thread. To this Baader adds an M48 to T2 adapter. This can be removed to utilize the full aperture of the Mark III and reduces the possibility of vignetting. E.g advantage can be taken of a Canon EOS wide mouth adapter. Equally important, the larger aperture makes it easier to pick off a star to the edge of the field with an Off Axis Guider. This feature of the Baader is not clear in OPT's picture. Just do a Google search on the Baader to find pictures which show the removable M48-T2 adapter. I do not currently have one but plan to purchase. My review stars simply mirror the opinions of others.
This coma is amazing, gives a fully flat field with my f5 newtonian and an APS-C sensor. Very easy to use with DSRL. Great product!
I bought this corrector for my Astro-Tech AT8IN F/4 Newtonian. Without the corrector, stars at the edge of the field look like arrowheads. I had heard poor results from correctors on F/4 scopes, so crossed my fingers on this one. In short it fully corrects the stars at the edge of field without increasing F Ratio! I'm totally happy with this corrector's performance.