[Peter Ward]

Yes, I recall the debate well!

For extended sources I suspect the truth lies somewhere in between the two....in any event Stan's analysis certainly confirms aperture only rules with stars.

Steve Crouch's image of Omega using a F2.8 episilon showed some very faint nebulosity near the cluster that very few had seen before... I suspect the fast F-ratio was a factor.

Originally Posted by sjastro

Peter,

Remember the flare up on the SBIG forum a few years ago regarding F-Ratio and CCDs for extended objects.
http://www.stanmooreastro.com/f_ratio_myth.htm

I don't agree with Stan's assertions but this report is hard to refute on the evidence presented.

Regards

Steven
http://users.westconnect.com.aa/~sjastro/small

PS

Don't tell Stan about it!