joachim
Convicted Ektachome user
Hi,
I only noticed this yesterday. When using the 21mm Biogon (for Contax G), the images on the film are larger (about 0.5mm in either direction) then when using either of the longer lenses. I noticed it, because the spacing between the frames was very small when using the Biogon. Checking against the perforation, there is definitely not a frame spacing issue with my camera.
The reason must be that there is quite a distance (1 or 2 mm) between the gate in the camera and the film. Due to the light rays hitting the frame corners at a steep angle, the rays get further out with the Biogon than do for the longer lenses.
I think it is all quite amusing. Anyone else noticed that before? I have never see this discussed anywhere.
I only noticed this yesterday. When using the 21mm Biogon (for Contax G), the images on the film are larger (about 0.5mm in either direction) then when using either of the longer lenses. I noticed it, because the spacing between the frames was very small when using the Biogon. Checking against the perforation, there is definitely not a frame spacing issue with my camera.
The reason must be that there is quite a distance (1 or 2 mm) between the gate in the camera and the film. Due to the light rays hitting the frame corners at a steep angle, the rays get further out with the Biogon than do for the longer lenses.
I think it is all quite amusing. Anyone else noticed that before? I have never see this discussed anywhere.