Arthur Red Rod
Well-known member
Hello everyone,
I have been digibinning the birds around my house using a tripod set-up on the veranda for a couple years now. I am entertaining the idea of purchasing a spotting scope down the road for the same purposes out in the field.
My only reservation is the issue of vignetting. I have not dealt with this problem at all with binos, as the exit pupil is sufficiently large and I am forced to use digital zoom anyway. As such, I am quite ignorant on the optical principles behind vignetting and how to adjust for it.
As far as I understand it, even with a properly aligned set-up, vignetting can start to occur as you increase the zoom on the scope because the eye relief shortens and the phone progressively goes out of alignment. This was a suspicion I had in my head and some cheesy advertisements for the "Phone Scope" seem to confirm this.
The phone adapters I've been looking at seem to have no mechanism for adjusting eye-relief and frankly, I am concerned adjusting it at all will be too much of a pain to deal with compared to binos. Despite the obvious lack in magnification, I have grown quite fond of the digibinning set-up for its ease-of-use and could not see myself having the patience for something significantly more cumbersome.
Any insight into this matter would be greatly appreciated. Thank you in advance.
I have been digibinning the birds around my house using a tripod set-up on the veranda for a couple years now. I am entertaining the idea of purchasing a spotting scope down the road for the same purposes out in the field.
My only reservation is the issue of vignetting. I have not dealt with this problem at all with binos, as the exit pupil is sufficiently large and I am forced to use digital zoom anyway. As such, I am quite ignorant on the optical principles behind vignetting and how to adjust for it.
As far as I understand it, even with a properly aligned set-up, vignetting can start to occur as you increase the zoom on the scope because the eye relief shortens and the phone progressively goes out of alignment. This was a suspicion I had in my head and some cheesy advertisements for the "Phone Scope" seem to confirm this.
The phone adapters I've been looking at seem to have no mechanism for adjusting eye-relief and frankly, I am concerned adjusting it at all will be too much of a pain to deal with compared to binos. Despite the obvious lack in magnification, I have grown quite fond of the digibinning set-up for its ease-of-use and could not see myself having the patience for something significantly more cumbersome.
Any insight into this matter would be greatly appreciated. Thank you in advance.