35mm 1.8 & extension tubes

Started May 28, 2012 | Discussions thread
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_sem_ Veteran Member • Posts: 4,775
Re: Max reproduction ratio about 1.94x

David Lal wrote:

...Therefore the reproduction ratio is 68/35=1.94x lifesize.

If there is any working distance left. When adding extension tubes, the working distance decreases.

You should stop the aperture to F/8 or more to get useful images, both to get some DoF and useful image quality. But not to far if you mind diffraction softening.

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