35mm 1.8 & extension tubes

Started May 28, 2012 | Discussions thread
David Lal
Veteran MemberPosts: 7,676
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Max reproduction ratio about 1.94x
In reply to tonybax, May 28, 2012

The reproduction ratio achievable with extension tubes is determined by the ratio of the focal length of the lens to the length of the extension tubes. Maximum tube length with the Kenko tubes is 68mm. Therefore the reproduction ratio is 68/35=1.94x lifesize. You will therefore lose approximately 2 stops of light.

David

tonybax wrote:

has any one tried the 3 set tenko extension tubes on a 35mm 1.8, if so what were the results.

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