Quote: Sounds to me that it will work OK. Your chip is 8mm, so there should be no vignetting.
I use a Meade f/3.3 on my 12" LX200 Classic and vignetting is evident but resolved with good 'flats'. I've even pushed the 'speed' to f/2.6 with extension tubes [I'm using a tiny Starlight Xpress Lodestar CCD] where vignetting obviously becomes more of a problem but again sorted with good flats. In this mode the native 3000mm fl is reduced to ~800mm and the fov increased dramatically with some slight loss of image quality
Be advise the actual f/ratio is much effected by the precise separation of focal reducer from sensor - a few millimeters makes a great difference - don't assume you can just screw it in and get f/3.3.
I check the actual fov [various ways to do this] to determine the new reduced focal length then calc the new F/ratio by dividing the scope aperture into the new focal length
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