Test Comparison time... (Tamron 70-200 @ 100mm VS Zeiss 100) - UPDATED

Joined
Mar 23, 2007
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Collecchio, northern Italy
Hi guys
later on today I'll spend some time for a (non-scientific yet fair I hope) comparison between the Tamron 70-200 and the Zeiss 100 on a D700 tripod mounted.
This morning, while shooting Christmas stuff, I had also the (unexpected) opportunity to test the Zeiss against colour fringing and I'll post the results as well, by the way the short story is that purple fringing is evident at F/2, reduced at F/2.8 and gone by F/4 and however it was a VERY extreme subject (so far I couldnt raise this at all, just by chance I noticed it against the frame with mirror-pieces I shot)
 
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Joined
Mar 23, 2007
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Collecchio, northern Italy
  • Thread Starter Thread Starter
  • #2
Here we go with the purple fringing

I managed to reduce the size of each picture as requested by our mods.

1) Full frame: sun-moon frame with mirror pieces around them.
This has been shot at 1/60s - F/5.6 - +0.5 EV - 3200 iso
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2) Top part at 1/350s - F/2 - here is where purple fringing is more evident
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3) 1/250s - F/2.8 (a little discrepancy between F/2 and F/2.8 yet not really meaningful) - as you see, fringing is still present yet less evident
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4) 1/125s - F/4 - fringing is gone by 99%
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5) 1/60s - F/5.6 - crop of the above image, I can't see any fringing here
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Jan 18, 2008
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Denmark
Mine does it too. Does anyone know if some are worse than others? I know it is a known trait of the lens, but I have no idea whether sample variation plays a role in the severity.
 
Joined
Mar 23, 2007
Messages
4,924
Location
Collecchio, northern Italy
  • Thread Starter Thread Starter
  • #4
Here we go.
As much as I could I worked to have the same frame and magnification, the only (relevant) parameter I couldnt change was the shooting angle due to the fact that while shooting with the 100, the camera was mounted on the tripod, while with the 70-200 the tripod was attached to the lens collar, thus introducing a delta, visible in the slideshow.
Despite that, it looks clearly like the Zeiss has more "bite" and contrast across the whole series. Cities and colours pops more clearly than in Tamron's.
Both Tamron and Zeiss metered the same values and that's good.

First, Zeiss (which has a speed advantage) then Tamron - all shots at 1600 iso
All pics are on the 130-150 kb size

The globe, focused on Rome, Italy, 1/750s - F/2
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Zeiss, 1/350s - F/2.8
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Tamron
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Zeiss, 1/180s - F/4
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Tamron
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Zeiss, 1/90s - F/5.6
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Tamron
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Zeiss, 1/45s - F/8
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Tamron
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Zeiss, 1/20s - F/11
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Tamron
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Zeiss, 1/10s - F/16
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Tamron
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Here's the whole slideshow for those who prefer it:
http://italy74.smugmug.com/photos/swfpopup.mg?AlbumID=20647700&AlbumKey=Cm2Rf7
 

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