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Exposure magnification
May 30, 2012 18:25:31 #
I am looking to purchase a 2x Mutar lens converter for my Zeiss 300mm lens. The lens magnification is twice the focal length, but what does "Exposure magnification 4X" mean?
It is an F4 lens. What will the largest effective F stop then be with the converter?
Bill
It is an F4 lens. What will the largest effective F stop then be with the converter?
Bill
May 30, 2012 20:26:59 #
shieldsadvert wrote:
I am looking to purchase a 2x Mutar lens converter for my Zeiss 300mm lens. The lens magnification is twice the focal length, but what does "Exposure magnification 4X" mean?
It is an F4 lens. What will the largest effective F stop then be with the converter?
Bill
It is an F4 lens. What will the largest effective F stop then be with the converter?
Bill
Don't know what "Exposure magnification 4X" means but a 2x teleconverter will lose you 2 stops or the max aperture of an f/4 lens will be f/8 with a 2x converter.
With respect to "Exposure magnification 4X" it may refer to the macro magnification due to the distance from the effect of the extension tube of the converter...just a guess, not sure.
May 30, 2012 20:30:03 #
Thanks for bearing out my suspicion that it would cost two stops. I believe your observation on the affect on close up field of view is also correct.
Thanks.
Thanks.
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May 31, 2012 02:44:39 #
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