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- 2,996
- Name
- John
- Edit My Images
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I have an issue that I am trying to get my head around. It is to do with zoom lenses where the maximum aperture changes as you zoom the lens.
First issue. I set the aperture ring to f/3.5 while the lens is zoomed to 28mm. I now zoom the lens to 210mm (my particular lens but applies to any such lens), the aperture is now f/5,6 but the aperture ring still says f/3.5. I am happy that the physical aperture remains the same so the relative aperture must change. Does this affect the relative aperture at the other aperture ring settings?
Second issue. I am using this lens on my 'new' Nikon Nikkormat EL. When fitting the lens to the camera, I have to index the lens by turning the aperture ring to both its limits. I do this with the lens set to 28mm. When I zoom to 210mm, does the camera's light meter take this change of relative aperture into account?
First issue. I set the aperture ring to f/3.5 while the lens is zoomed to 28mm. I now zoom the lens to 210mm (my particular lens but applies to any such lens), the aperture is now f/5,6 but the aperture ring still says f/3.5. I am happy that the physical aperture remains the same so the relative aperture must change. Does this affect the relative aperture at the other aperture ring settings?
Second issue. I am using this lens on my 'new' Nikon Nikkormat EL. When fitting the lens to the camera, I have to index the lens by turning the aperture ring to both its limits. I do this with the lens set to 28mm. When I zoom to 210mm, does the camera's light meter take this change of relative aperture into account?