vd Berg
Active member
Hello,
I digiscope for idenfication purpose. ‘tac sharp’ photos are not intended. For digiscoped identification purpose the performance of the telescope, camera, pancake/apochromat/prime lens and the achievable settings are relevant with regards to the birds size, contrast, weather conditions and distance towards the bird. As far I know a Digidapter © with telescope sleeve, Sigma/Zeiss/Voigtlander pancake lens can’t be rented in Europe.
Can you explain, why the camera’s aperture can be set to the widest open aperture of a pancake lens (Sigma/Zeiss/Voigtländer f/1.8, 2.0, 2.8, etc.), whilst the camera’s aperture must be set to the Swarovski rigs aperture (~f/8 to f12) when using a Swarovski TLS APO 23, 30, 43mm?
Does or doesn’t have the Swarovski TLS APO an aperture?
(Why) works a Swarovski TLS APO, yes or no, the same as a pancake lens (Sigma/Zeiss/Voigtländer f/1.8, 2.0, 2.8, etc.) with regard to the camera’s aperture, achieving better camera metering, gaining lower shutter speed and ISO, without losing depth of field when using a pancake lens?
With kind regards, vd Berg
I digiscope for idenfication purpose. ‘tac sharp’ photos are not intended. For digiscoped identification purpose the performance of the telescope, camera, pancake/apochromat/prime lens and the achievable settings are relevant with regards to the birds size, contrast, weather conditions and distance towards the bird. As far I know a Digidapter © with telescope sleeve, Sigma/Zeiss/Voigtlander pancake lens can’t be rented in Europe.
Can you explain, why the camera’s aperture can be set to the widest open aperture of a pancake lens (Sigma/Zeiss/Voigtländer f/1.8, 2.0, 2.8, etc.), whilst the camera’s aperture must be set to the Swarovski rigs aperture (~f/8 to f12) when using a Swarovski TLS APO 23, 30, 43mm?
Does or doesn’t have the Swarovski TLS APO an aperture?
(Why) works a Swarovski TLS APO, yes or no, the same as a pancake lens (Sigma/Zeiss/Voigtländer f/1.8, 2.0, 2.8, etc.) with regard to the camera’s aperture, achieving better camera metering, gaining lower shutter speed and ISO, without losing depth of field when using a pancake lens?
With kind regards, vd Berg