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KAF8300 and Photometry

Started by Biscuit, 01/30/2011 12:39PM
Posted 01/30/2011 12:39PM Opening Post
Has anyone tried to use a monochrome KAF8300-chipped CCD to do photometry? It's ABG, but reputed to have 'good linearity' according to a number of manufacturer's web sites.

I'm stuck in a decision loop between an ST-8XME or an 8300 based CCD. Since it would be on an f/10 12" ACF, I would probably need to bin the 8300, which might cause more problems. Or wait until a decent reducer is produced that doesn't also flatten fields!

Brian.

Meade 12" LX-200 ACF
SkyShed POD
Stellarvue 80 mm 80/9D Achromat
Meade LXD-75 8" SN
Posted 01/30/2011 04:21PM #1
The KAF8300 well depth is low at 25ke, and it has anti-blooming that affects linearity at the high end. These probably make it less than ideal for photometry. Binning 2x2 will make the well depth comparable (100ke) to chips with higher dynamic range, but I don't know what you can do about the anti-blooming other than stay away from the saturation region where it kicks in.

Jim McSheehy