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06/11/2004 11:09:12 AM · #1 |
Random Tip for the Day
Using short extension tubes on a wide angle lens, to get a really close focus lens to further enhance the wide angle effect.
Just something I hadn't thought about before (mostly having been putting extension on telephoto lenses to get closer macro focus)
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06/11/2004 12:01:01 PM · #2 |
do you have any samples?
I may go shoot some samples with my kenkos and them 19-35mm lens
James |
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06/11/2004 12:04:12 PM · #3 |
Ahhh, yes! Exactly the technique I used on my shot from the "Threes" challenge:
Lots of folks recognized that it was taken with a very wide angle lens, and I thought I'd share how it was done.
I used the Peleng 8mm fisheye lens, which is an M42 screw-thread lens, used on the Canon 10D with an adapter. It turned out that this adapter was the key to success.
I wanted to achieve a sense of depth and an unusual perspective to set it apart from other flower shots. I knew I wanted to use the 8mm fisheye, but the 22cm minimum focus distance was too long. The three foreground daisies would have been only a tiny part of the frame. I tried using a 12mm extension tube, but even this was way too much extension. The furthest focus distance achievable was inside the front element!
I thought I was stuck, but then realized I had an infinitely variable extension tube in the mount. I just unscrewed the lens about one turn, and presto! Close focus! The resulting shot was taken with the nearest petals less than 2cm from the front element, and yet the rearmost petals on the upper flower, nearly 20cm away, were held in focus. The background retained enough detail to give a sense of the setting without being too distracting.
This is a relatively extreme example of what Gordon is talking about, and I though this was a wonderful opportunity to discuss the technique.
edit: Darn typos!
Message edited by author 2004-06-11 12:27:12.
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06/11/2004 12:06:42 PM · #4 |
You raise a good point that it has to be a small amount of extension :) And that is a fine example of the technique too. It isn't actually something I've tried yet, only heard about it last night.
Message edited by author 2004-06-11 12:07:24.
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06/11/2004 12:18:24 PM · #5 |
| It is a very pleasing photo, in it's colors as well as the focus/depth; definitely sits "apart from other flower shots". |
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06/11/2004 12:30:31 PM · #6 |
I just tried a few shots with my 19-35mm lens and each of the kenko tubes and I could not acheive focus @ 19mm, I had to zoom out to around 26mm to get anything.
Based on Kirbic's experience maybe this method is only good for lenses wider than 19mm,
James |
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06/11/2004 12:34:10 PM · #7 |
Originally posted by jab119:
I just tried a few shots with my 19-35mm lens and each of the kenko tubes and I could not acheive focus @ 19mm, I had to zoom out to around 26mm to get anything.
Based on Kirbic's experience maybe this method is only good for lenses wider than 19mm,
James |
Yeh, I really wish there was a 6mm extension tube for the EOS system, but mechanically, I think this would be difficult to pull off.
Alternatively, one could use some of the older Zeiss screw-mount lenses and use the trick I used with the Peleng...
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06/11/2004 12:59:32 PM · #8 |
Gosh darnit!!! Stop making me want to buy more equipment!!! 
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06/11/2004 03:28:24 PM · #9 |
Originally posted by jab119:
I just tried a few shots with my 19-35mm lens and each of the kenko tubes and I could not acheive focus @ 19mm, I had to zoom out to around 26mm to get anything.
Based on Kirbic's experience maybe this method is only good for lenses wider than 19mm,
James |
What extension options do your kenko tubes give you ? Is it the 12, 20, 36mm set ?
Message edited by author 2004-06-11 15:29:38.
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06/11/2004 06:00:12 PM · #10 |
Gordon, yes I have the 12, 20 & 36 Kenko's
James |
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