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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 17 Jul 2009 (Friday) 10:00
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question for 35mm f1.4 owner

 
BeritOlam
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Jul 18, 2009 17:50 |  #16

But the biggest question remains.....what in the world are you using Kirkland batteries for?? ;-)a ;-)a ;-)a


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Yohan ­ Pamudji
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Jul 18, 2009 19:24 |  #17

Definitely do more testing. After looking at my shots I've confirmed that mine is sharper than that wide open, so your test shot might not have been exactly in focus. I missed this part of your original post:

Calflames wrote in post #8296195 (external link)
...
I also found the front focusing issue.
...

So you did find a front focusing issue? If so I might've been right about your test shots being slightly front focused. If that's the case, f/2 could've been sharper because the depth of field of f/2 masked the front focus that you're experiencing.

If redoing the battery test, I'd try placing the batteries closer together so if there's front focus it'll be easier to see since the front battery will be sharper than it should be and the back one blurrier than it should be.

Possibly a better test would be to line up some thick books and focus on the spine of one of them. That has helped me sort out front-back focus issues in the past.




  
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kster
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Jul 18, 2009 23:02 |  #18

Calflames wrote in post #8303141 (external link)
Thanks for all the reply. will try more testing. what about front focus problem. Did anyone experience this issue?

I did a focus test this morning with LensAlign Pro and my 35 f1.4 was front focusing. I needed to dial in +10 of microfocus adjustment to offset this.

But I have been happy shooting wide open with it (although it's not quite as sharp as the 85 f1.2 wide open).


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KQS
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Jul 21, 2009 20:59 as a reply to  @ post 8303141 |  #19

Have you tried LensAlign? Check out <http://www.rawworkflow​.com/lensalign> (external link);




  
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Palladium
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Jul 21, 2009 21:17 as a reply to  @ KQS's post |  #20

I'm thinking user error if these tests were done hand held

too slow of SS

1/200 & 1/100




  
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Calflames
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Jul 22, 2009 11:49 as a reply to  @ Palladium's post |  #21

I have redone the testing in the day light with iso 100. the result is much better. The sharpness on f1.4 is acceptable. And the front focus problem seems very minor. So I decided to keep the lens. Will upload some pics once I got used to this lens. Thanks for your help.


Canon 5DII 35mm f1.4L, 50mm f1.2L, 135mm F2L
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question for 35mm f1.4 owner
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