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View Full Version here: : Can someone astrosmart please work this out?


Varangian
10-04-2014, 05:02 PM
Am I going to have a larger FOV using an 18mm 82 degree eyepiece @ 84x when compared to a 14mm 100 degree eyepiece @ 108x :question:

Thank you.

mental4astro
10-04-2014, 05:09 PM
Divide the AFOV by the respective magnification. That will give you the true FOV .

By the values you give, the difference is small, 0.926º for the 14mm & 0.976º for the 18mm.