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Old Apr 3, 2007, 4:26 PM   #1
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Could everyone get a bad copy (check out that MTF)?
http://www.photodo.com/topic_239.html
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Old Apr 3, 2007, 4:38 PM   #2
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i got this lens for my 20D. when i moved to 5D i kept it. Initially thought of selling since i felt 12mm was too wide.. but after using it on a FF with least vignetting i decided to keep it for some really interesting shots...

This lens is excellent from 12mm and at 16-24mm the lens is brilliant.

I get good images even wide open. Half the time i dont even realise that i havent stepped down.. at f11 it resolves brillaint image. from corner to corner.

THERE IS NO WAY I AM SELLING THIS LENS
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Old Apr 4, 2007, 10:36 AM   #3
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... The most interesting part IMO is the flatness of this 12-24 EX MTF curves from center to edge against the "peaky" sharpness of the other digital only lenses which varies with the apertures used.

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Old Apr 4, 2007, 11:35 AM   #4
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its almost the same from wide open to till say f11 atleast.....and i have never used this lens beyond f11...mostly use it wide open and still get great results...

and as the chart say its better wide open at 12mm..and its true...

vignetting is never a problem with this lens atleast my copy. I am getting a mark II and i hope it performs similar way :-)
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Old Apr 4, 2007, 4:06 PM   #5
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It's early days for me, but it's looking pretty good on my 5D too.

And 12mm on FF is VERY wide!
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Old Apr 4, 2007, 4:38 PM   #6
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Peripatetic.

the perspective is very strange...very very different and if u like the perspective u would love lens..

it does appear as if like a fish eye at 12mm
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Old Apr 4, 2007, 8:55 PM   #7
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nymphetamine wrote:
Quote:
it does appear as if like a fish eye at 12mm
It's a rectilinear (and not a fisheye) - BTW with the front mounted polarizer you can't get it wider than 18mm anyway on a 1D MrkII

From the Cherry Blossom Festival in DC:


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Old Apr 4, 2007, 9:50 PM   #8
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doesnt itvignette after mounting the polarizer even at 18mm..

at 12mm in a FF the pictures start to vignette when a polorizer is attached. i try to use glass flims holding it front for the lens as a polarizer...sometimes it works..cheap polarizer option )
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Old Apr 5, 2007, 10:33 AM   #9
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nymphetamine wrote:
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doesnt itvignette after mounting the polarizer even at 18mm..
Slighly (see top corners) - 18mm is the absolute widest until you can see the filter ring up front



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at 12mm in a FF the pictures start to vignette when a polorizer is attached. i try to use glass flims holding it front for the lens as a polarizer...sometimes it works..cheap polarizer option )
IMO you'll have a problem here no matter what because of such a wide angle the polarizer will darken the sky more in some areas than other depending on where the sun angle is - It's not going to be uniform no matter what (even with a rear filter) :shock:
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Old Apr 5, 2007, 3:26 PM   #10
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At 12mm the vignetting with the filter ring is very noticable. It actually goes beyond what I would normally describe as vignetting.

The whole picture is just circular. This is easily seen through the viewfinder, you don't need to wait for the shot to see it.

I might take a few shots like that just for fun though. :-)
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