|
Torr
With the pinching of the optics, mirrors are accurate to within fractions of a wavelength of light, which is measured in nanometres, so tiny deformations can affect the image. No material is 100% rigid.
With the EPs, don't get too worried about exit pupil. Having an exit pupil smaller than your fully diluted pupil is ideal, but not essential. I have used a 35Pan in my f5 scope with no issues.
Malcolm
|