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I dont know about the ED127 Peter, but the MPCC works fine with my refractor.. I use the 55mm spacing that Baader recommend, It seems fairly critical though. I had an old adpater that was for my QHY8 to MPCC, which was 1.8mm too long for the Orion StarShoot Pro camera. I got 'Good' but not perfect results using that spacer, I then had a new one turned up that was the exact measurement required and the results were perfect.. Luckily, this spacing is the same as the spacing for another flattener I have for the refractor, so I can use the MPCC to shoot at 480mm F/6 or the TV 0.8x reducer to shoot at 384mm F/4.8...
Other flatteners that you could try..
The TS2 flattener - I think these are available from Optcorp, Not certain though... if you google TS2 field flattener you should find it.
The Astrotech 2" field flattener
Both those options are a pure flattener, no focal length reduction at all. If you want to flatten the field and reduce the focal length a bit, you could try:
WO 0.8x V3 or V2
Borg DG-L 0.85x
Cheers.
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