An extension tube - is used with interchangeable lenses to focus closer, useful in macro photography. The tube contains no optical elements; its sole purpose is to move the lens farther from the image plane. The farther away the lens is, the closer the focus, the greater the magnification, and also the greater the loss of light (requiring a longer exposure time).
Questions tagged [extension-tubes]
82 questions
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Do extension tubes degrade image quality?
I am concerned that the extension may degrade the image quality. I guess my question is two-fold:
How do extension tubes work?
Can a good quality extension tube degrade the image quality?
James
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Extension tube images come out of focus
I stepped into macro photography with a 50 mm f1.8 lens and a passive extension tube. Since the tube has no electrical features and lens has no on-lens aperture control, I am left with extremely shallow depth of field, annoyingly shallow even for…
e-mre
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What does the "DG" in "Kenko DG Extension tubes" mean? What are the differences between DG and non-DG versions?
I'm looking to purchase a set of extension tubes, and a seller I'm talking to is selling a set of Kenko extension tubes, pre-DG model. I could not find any information about what DG stands for when it comes to extension tubes, nor could I find any…
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I am looking for a 2X extender for a Canon 100mm EF 2.8 (non L series)
I have a Canon 100mm EF 2.8 Macro lens (not an L series) for my 70D. I want a 2x extender, but am not sure what to get that will fit and work. I have not seen a 2x for a non L lens.
