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One thing that has not been mentioned is that the ccd67 is a smaller reducer and vignettes on larger chips. Works great on 8300 sized chips and smaller, aps size... Not so much. Ymmv.
I have a 67 reducer and I use the larger ap27tvph a lot more. On my ap 130, I get some curvature of field natively, when the tvph is installed it flattens the field neatly and reduces it to f4.8, this is with a 6303 sized sensor.
I did try the 67 on a 150mm f11 refractor, I pulled it out when I starting using a 35mm sensor and installed the tvph. After reading this thread, I might have to revisit experimentation with the ccd67.
Brett
Brett
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