pbjosh
missing the neotropics
Hello folks,
I'm not particularly versed in digiscoping / digibinning but have done a bit here and there.
In any case, lately I've been trying to understand optical distortion in binoculars more and I've been wanting to take photos of the FOV of some of my bins in order to see a fixed image without my accommodation.
For reference, at the moment I'm playing with two bins with relatively large AFOV (Kowa BDII 6,5x32 and Nikon MHG 8x30), and using an iPhone 8 Plus that has two rear cameras - 28mm equivalent and 56mm equivalent. With the 56mm I cannot even begin to capture the entire FOV. With the 28mm I can get close but I can't seem to get it all. I assume this is just an artifact of the AFOV of the binoculars, and thus the angle of the cone of light coming out of the objective lens, being greater than the FOV of a 28mm lens? Or is there something that can be done to capture the entire FOV?
A second question - does anyone have recommendations for more successfully handholding a cel phone to bin? Perhaps a good home-brew adaptor? I find it very difficult to align the phone and the exit-pupil of the bin reliably and completely avoid vignetting or blackouts.
I'm not particularly versed in digiscoping / digibinning but have done a bit here and there.
In any case, lately I've been trying to understand optical distortion in binoculars more and I've been wanting to take photos of the FOV of some of my bins in order to see a fixed image without my accommodation.
For reference, at the moment I'm playing with two bins with relatively large AFOV (Kowa BDII 6,5x32 and Nikon MHG 8x30), and using an iPhone 8 Plus that has two rear cameras - 28mm equivalent and 56mm equivalent. With the 56mm I cannot even begin to capture the entire FOV. With the 28mm I can get close but I can't seem to get it all. I assume this is just an artifact of the AFOV of the binoculars, and thus the angle of the cone of light coming out of the objective lens, being greater than the FOV of a 28mm lens? Or is there something that can be done to capture the entire FOV?
A second question - does anyone have recommendations for more successfully handholding a cel phone to bin? Perhaps a good home-brew adaptor? I find it very difficult to align the phone and the exit-pupil of the bin reliably and completely avoid vignetting or blackouts.