Extension tubes question
Jan 14, 2013 09:23:22 #
When extention tubes are used , it is said it lets you focus closer on your subject. Does this mean you can get physically closer to your subject and still be able to focus or does it bring your subject matter closer by zooming effect? I hope this makes sense. In other words, if without tubes my 1:1 macro is 6.5 inches from the subject, does that mean if I use extension tubes it will let me get closer than 1:1 if I take a picture at say 4.5 inches. I hope this makes sense enough to answer my question. Thanks .
Jan 14, 2013 09:28:45 #
yes,i use a full set on my sig 105 and it focuses at about 4" to 12" but i get 2-1 or better.tom
Jan 14, 2013 12:29:26 #
When I shoot at Minimum Focusing Distance with my Nikkor 105-mm macro lens, my Working Distance is about 6-3-inches, rendering 1:1 magnification (life-size).
With 68-mm of extension tubes added to the exact same scenario, my WD is about 4-inches, rendering 2:1 mag (2x life-size).
With 68-mm of extension tubes added to the exact same scenario, my WD is about 4-inches, rendering 2:1 mag (2x life-size).
105-mm MWD field of view on DX sensor = life-size
105-mm MWD field with 68-mm tubes on DX sensor
Jan 14, 2013 15:31:45 #
Kind of what I thought. It actually allows you to get closer to your subject (WD) and the results are actually greater than actual size. Correct?
Jan 14, 2013 19:03:28 #
boomboom wrote:
'Xactly!Kind of what I thought. It actually allows you to get closer to your subject (WD) and the results are actually greater than actual size. Correct?
Jan 14, 2013 19:23:48 #
Thanks for clearing that in my mind. Sometimes it's better to ask than to second guess what your doing. Once again, the UHH comes through in the pinch.
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