I'm here again seeking advice. If an EP gives you 37x on a scope with a focal length of 570mm, what would it be on a scope with 390mm?
Also the zoom gives you 27x72 on 570mm what would that be on a scope with 390mm?
The reason I'm asking is because I've just got my Pentax PF65ed11 and at the moment I'm using the Opticron Ep's
Thanks in advance
Ron
Also the zoom gives you 27x72 on 570mm what would that be on a scope with 390mm?
The reason I'm asking is because I've just got my Pentax PF65ed11 and at the moment I'm using the Opticron Ep's
Thanks in advance
Ron