What determines the field of view for the same magnification and objective lens? (1 Viewer)

[Barbican1987]

It's been an interesting discussion, thanks everyone for your comments.

 

[has530]

The aFOV is set by the field stop diameter and eyepiece focal length given by the equation:
aFOV=2arctan(r/fe).
Should' r ' read field stop radius rather than diameter?

Yes I was just being lazy/careless when I said diameter. You could replace r with d/2 but it is easier to write as r (and diameter is the convention when talking about field stop width).

 

[Barbican1987]

Yes I was just being lazy/careless when I said diameter. You could replace r with d/2 but it is easier to write as r (and diameter is the convention when talking about field stop width).

Ok thanks