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FORUMS Cameras, Lenses & Accessories Canon Lenses 
Thread started 13 Jul 2012 (Friday) 16:36
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Canon or Sigma 50mm 1.4

 
Thorrulz
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Jul 14, 2012 14:21 |  #31

chumlee wrote in post #14716184 (external link)
I'm glad to say i got a sigma that focuses nicely :)

Welcome to the club.;)


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chumlee
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Jul 14, 2012 14:42 |  #32

I really cant tell how the colors on this are, im on the worst monitor ever (not my computer) with the color intensity set to like 500% lol.

But you can get the general idea...This focused exactly where I put the little box. this lens is so sharp @ f/1.4

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IMG_9476 (external link) by JPang Photography (external link), on Flickr

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cdifoto
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Jul 14, 2012 15:38 |  #33

bob_r wrote in post #14716048 (external link)
When I bought my Canon 135L, it would not focus properly with my camera and I sent it to Canon twice to get it calibrated. It still wouldn't focus properly and Canon asked me to send in my body with it. They also asked me to check all my other lenses to make sure they were focusing properly with my body. My 85 was a little off wide open, so they asked me to send in both lenses with my body. I asked them not to make adjustments to my body since it worked fine with my other lenses.

According to the work sheet they enclosed when they returned my equipment, they did make adjustments to both lenses and the body, even though I requested that they not adjust the body. I was then worried that I'd have issues with my other lenses, but they all worked fine.

I'm not sure if this is Canon's normal method for calibrating, but they did calibrate 2 of my lenses to my camera.

They calibrate lenses and bodies independently to a single standard. You just think they were calibrated to each other because they're both now within tolerance...and most likely closer to perfect than they ever were when new.


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ed ­ rader
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Jul 14, 2012 16:17 |  #34

bob_r wrote in post #14716048 (external link)
When I bought my Canon 135L, it would not focus properly with my camera and I sent it to Canon twice to get it calibrated. It still wouldn't focus properly and Canon asked me to send in my body with it. They also asked me to check all my other lenses to make sure they were focusing properly with my body. My 85 was a little off wide open, so they asked me to send in both lenses with my body. I asked them not to make adjustments to my body since it worked fine with my other lenses.

According to the work sheet they enclosed when they returned my equipment, they did make adjustments to both lenses and the body, even though I requested that they not adjust the body. I was then worried that I'd have issues with my other lenses, but they all worked fine.

I'm not sure if this is Canon's normal method for calibrating, but they did calibrate 2 of my lenses to my camera.

they do it that way when they have to.

ed


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Calsar
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Jul 18, 2012 18:39 |  #35

Recently purchased the Sigma and just got around to giving it a tryout. It has some good weight and seems sturdy. Unfortunately after having some trouble with images being very soft, I setup for a focus test and got this...

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I could really crank up the MA and get it close but even then the focus was very inconsistent. So this copy is on its way back for exchange. I'm hopeful for the next copy. :)

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