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Old Oct 18, 2008, 10:15 PM   #1
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I have been lusting after one of the Sigma 180mm macro lenses for some time but not been able to part with $900 for one, especially since I have 180mms covered with a Tamron 180mm Adaptall (non-macro) already, and it is the sharpest lens I own. After shooting with Goldwinger this past weekend and seeing his extension tube macro set up I decided to try extension tubes on the Tamron.

Overall I was pretty pleased. I used 48mm of extension tubes which did not get me down to 1:1 but did give me pretty good magnification at a much longer working range than the 105mm. The 180mm has a nicely damped focus but the short throw was hard to get used to for this purpose. Oh, and the bokeh was just perfect.

Here are a few from yesterday using this combination:
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Old Oct 18, 2008, 10:16 PM   #2
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Skipper
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Old Oct 18, 2008, 10:18 PM   #3
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Wasp Moth.
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Old Oct 18, 2008, 10:19 PM   #4
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Bug Love:
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Old Oct 18, 2008, 10:20 PM   #5
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This bee was probably 8mm or so long.

The one problem I have always had with this lens is the adaptall KA adapter has enough play that, when focusing, the lens and camera lose communication. When that happens the LCD screen reads F -- and every shot is over exposed. Does anyone know a solution for this?

Thanks for looking, I am looking forward to trying some more shots with this combo.

Tim
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Old Oct 19, 2008, 2:28 AM   #6
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I would be pleased, too! I think you would be hard pressed to get a lens much sharper than that! Great shots.

Glenn
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Old Oct 19, 2008, 3:48 AM   #7
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A more than great result, have been experimenting with a set of extension I've got, and don't come anywhere in the neighborhood of those shot.

Great work

Ronny
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Old Oct 19, 2008, 4:43 AM   #8
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NonEntity1 wrote:
Quote:
The one problem I have always had with this lens is the adaptall KA adapter has enough play that, when focusing, the lens and camera lose communication. When that happens the LCD screen reads F -- and every shot is over exposed. Does anyone know a solution for this?


Tim

Hi Tim,

I'm assuming from your comments that you're using an AD2 PK/A adaptor, in that case it's an intermittent grounding problem. I used a H pencil toclean up the area

indicated in the shot below ... clearing any surplus dust away after. Original info on this was posted by Scott in the lenses section, I dont have time to search for a link

right now. Hope this helps. Excellent shots BTW.... Jack.

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Old Oct 19, 2008, 7:05 AM   #9
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looks like a winner combo. magnification is 1:2.6 which is plenty good for most insects. any more length of ETs and it may get too dark to use..
the ratio is 48/180 giving the mag as 2.6666666666666666

roy
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Old Oct 19, 2008, 7:33 AM   #10
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Hey Tim.
Those are fantastic shots! I guess that means I won't be able to talk you out of that lens anytime soon
.:G

looks like your day off was well worthwhile!
wish I could get my bee shots to look that sharp.

GW:bye:
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