Quote:
Originally Posted by 5ash
I thought aperture decided resolution , not focal length
|
Mate,
They are taking the piss,
The resolution of the powernewt (or should that be gso-keller-newt) is not diffraction limited. The airy disk (and first diffraction ring) is simply too small to effect the spatial resolution achievable with any CCD in existence at f2.8. When you include pixel charge diffusion and the Seidel aberrations inherent in the design there is no way on Earth that the PSF is defined by the aperture of any of the instruments they sell.
... period ...
God I miss Bratislav...
