Megrez 88 - 90 ?

[BlueAstra]

Does anyone know the difference between the WO Megrez 88 FD ED and the Megrez 90 ED. Nearly £200 for that extra 2mm !

[Whippy]

AFAIK, the M90 is slower and better corrected while the M88 is faster at the expense of some CA. If I was buying one for observing and imaging, I'd get for the 90 while the 88 would probably be fine for observing.

Tony..

[BlueAstra]

Thanks for that, it would mainly be used for imaging. That narrows my choice down to Megrez 90, Meade 5000 APO, SW Equinox 80, in reducing order of reducing price. Does that order also reflect image quality?