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08/14/2005 11:59:48 PM · #1 |
I looked through the forums and could not find an answer so:
anyone have experience using extension tubes with a 70-200 VR (or IS for cannon users)? If so how close are you able to get your focus down to? |
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08/15/2005 12:07:54 AM · #2 |
| It depends on the length of the extension tube, but for any given tube length the effects the greatest the wider the lens. The formula if I remember correctly is Length of extension tube/ focal length = magnification. |
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08/15/2005 12:48:06 AM · #3 |
So it sounds like when set at 70mm this lens will give me a 1:2.5 magnification using the 27.5mm extension tube. I would assume that since the lens now has a mag factor of 1:6.1 that it would bring the focal legnth down from 5' to about 2'.
Does this sound right? |
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