Is there a formula to calculate this problem?Celestron and Pentax. Focus travel is limited in any fieldscope so not all astro eyepieces can reach focus at infinity.
Rick
Is there a formula to calculate this problem?
...Bob
Which other Spotting scopes can use astronomy eyepieces?
By the way, are here any user of 2" astro eyepieces in a spotting scope
Alberto,
By the way, are here any user of 2" astro eyepieces in a spotting scope?
Fernando
...AFAIK there are no spotting scopes whose bayonet or screw mounts could accept a 2" eyepiece.
I know Zeiss scopes have astro adapters and can use 1/4" and 2" astronomy eyepieces (like Nagler or Pentax XW).
Swarovski has 1/4" astro adapter.
Which other Spotting scopes can use astronomy eyepieces?
"For example let us assume a 20mm 2" occular with a 600mm focal length scope. That would be 30x."
I have a 30mm 2" occular with a 600mm scope - what do that give me? 20x ? (don't really know how to convert the "mm" of astro eyepieces to the "x" of spotting scopes. thanks in advance)
And no point since the prism clear aperture is never more than 20~25mm. Much smaller than the 27mm fieldstop of the widest 1.25" eyepiece, the 24mm Panoptic.
Rick