|
Hi Ken
I am not sure what a Toucam is equivilant to in an eyepiece (I think I read somewhere 6mm) so I will give you some figures based on that and a 3x Barlow.
Using a Canon 350D, and the equivilant to a 6mm eyepiece as above, you would have a focal length on the ED80 of around 4900mm, this would give you Arc Secs/Pixel of about 0.31 x 0.31.
Using a 3x Barlow, focal length would be about 1800mm, your Arc Secs/Pixel would then be around 0.76 x 0.76
At Prime Focus, it is 600mm, Arc Secs/Pixel is 2.19 x 2.19.
Which is close to ideal for normal seeing as I understand it.
Cheers
Last edited by JohnG; 27-07-2007 at 04:46 PM.
|