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06/23/2008 07:50:41 PM · #1 |
if you put a 36 mm extension tube on a 5o mm lens, does that make it a 86mm. I know you can focus closer, but I am curious if it brings up the magnification as well? Thanks in advance...
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06/23/2008 07:53:27 PM · #2 |
I don't think so. I believe you still have a 50mm lens that focuses closer. If anything, you lose that distance when you use extension tubes. When I use them on a 70-300mm lens, I can't actually focus on anything more than about 5 feet away.
The distance measurement on the extension tube is moving the lens away from the sensor so it can focus closer. The distance measurement on a lens is measuring amount of "zoom" (for lack of a better term, I'm almost brain-dead tonight). Two totally different things.
Message edited by author 2008-06-23 19:58:24. |
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06/23/2008 07:54:10 PM · #3 |
| It doesn't change the focal length, but it allows you to focus closer. |
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