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Thanks for the reply Ken and expert comments
I read an interesting article just a short time ago from Jerry Lodriguss on planetary imaging with a DSLR
He suggests to use the following formula for estimating the ( general rule of thumb ) focal length for detailed planetary imaging
FL = 8/ (P/S)
where P=image scale per pixel in arc sec ( use 1/3 arc sec or 0.33 )
S=size of pixel in microns
My Canon 600D is 4.3 micron
FL= 8/(0.33/4.3)
FL =104 inches or 2700mm
My scope has a FL = 900mm
2700/900 = 3 x mag required ( therefore F18 )
So therefore a 2.5x Powermate or 4x Powermate with my DSLR should provide good planetary detail
Of course atmospheric seeing conditions and location of planet ( > 50deg Alt ) are huge factors as well
Whats your thoughts on the above method and calcs ??
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