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FORUMS Canon Cameras, Lenses & Accessories Canon Lenses 
Thread started 03 Jan 2011 (Monday) 18:37
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This is pretty bad Back Focusing, isn't it? (Canon 50mm 1.4)

 
m.shalaby
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Jan 03, 2011 18:37 |  #1

SETUP: Tripod, level with horizon, shot at f/2.8 with center focus point directy on the "AS" in the word "ULTRASONIC".

You can see the focus is clearly behind it by looking at the preforated lines to the left and right of the word....

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR



jeeze......



  
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Alex_Venom
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Jan 03, 2011 18:42 |  #2

It seems so but it's kinda hard to tell as you showed just 1 photo and didn't describe your methodology.
Try taking more photos, at different distances and check if the behavior is the same. Try the batteries test instead of this lens as subject too...
Are you in MFD?


Photography is about GEAR and not talent or practice. Practice won't make you a better photographer. Expensive equipment will. =D
"Nobody can buy a scalpel and become a doctor, but anyone can buy a camera and become a photographer."

  
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m.shalaby
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Jan 03, 2011 18:42 |  #3

and this is at f/2.0 same focus point

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR



  
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m.shalaby
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Jan 03, 2011 18:43 |  #4

Alex_Venom wrote in post #11566984 (external link)
It seems so but it's kinda hard to tell as you showed just 1 photo and didn't describe your methodology.
Try taking more photos, at different distances and check if the behavior is the same. Try the batteries test instead of this lens as subject too...
Are you in MFD?

what else is there to describe? i went through my selt in very good detail...




  
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Snydremark
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Jan 03, 2011 18:48 |  #5

Doesn't the 60D have micro-focus adjust? This is small enough that you ought to be able to set -5 or so to bring it back toward the camera.


- Eric S.: My Birds/Wildlife (external link) (R5, RF 800 f/11, Canon 16-35 F/4 MkII, Canon 24-105L f/4 IS, Canon 70-200L f/2.8 IS MkII, Canon 100-400L f/4.5-5.6 IS I/II)
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ni$mo350
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Jan 03, 2011 18:58 |  #6

60D doesn't for some reason they left it out. Send it in for calibration or swap it for another one..


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Snydremark
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Jan 03, 2011 19:05 as a reply to  @ ni$mo350's post |  #7

Well.../facepalm. that really is a screwy thing to have left out.

Just out of curiousity, OP. When you use manual focus can you get it right on there? How far away from the lens are you with regards to this lens' minimum focus distance?


- Eric S.: My Birds/Wildlife (external link) (R5, RF 800 f/11, Canon 16-35 F/4 MkII, Canon 24-105L f/4 IS, Canon 70-200L f/2.8 IS MkII, Canon 100-400L f/4.5-5.6 IS I/II)
"The easiest way to improve your photos is to adjust the loose nut between the shutter release and the ground."

  
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m.shalaby
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Jan 03, 2011 20:07 as a reply to  @ Snydremark's post |  #8

what would you guys do, send it to Canon or exchange it for a new one ?




  
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zooxanthellae
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Jan 03, 2011 20:14 |  #9

Shot under natural or flourescent light? Anywhere near the MFD as mentioned?


Canon 5D MK II,7d,70-200 L F2.8,24-70L,100mm Macro usm F2.8,sigma 150-500 OS,50mm 1.8 mk II,580 ex II. :D

  
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hieu1004
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Jan 03, 2011 20:16 |  #10

mdgrwl wrote in post #11567601 (external link)
what would you guys do, send it to Canon or exchange it for a new one ?

Did you buy it from a local store? If yes - I'd exchange it and bring it my camera and do a test on the spot. With the 60D, I'm sure you can take a shot and zoom in with the back LCD to give a good indication of a sharp copy. If you didn't, I'd still exchange it - I think they want you to send in the camera body as well - it can be kind of a hassle.

Try to line up 5 batteries (AA or AAA) and place one behind the other in a 45 degree angle. Mount on a tripod or place the camera on a flat surface and focus on the center/middle battery. This method usually gives a pretty good indication of front back focus. It's a crude test, I know, but it gives a quick indication of the focus issues.


-Hieu
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yourdoinitwrong
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Jan 03, 2011 20:18 as a reply to  @ hieu1004's post |  #11

As long as you are past MFD and it consistently does this you might as well exchange it for a new one if you can. That would be a lot less hassle than sending it to Canon and paying for the shipping/insurance.


5D4 w/BG-E20, 24-105 f/4L, 70-200 f/2.8L IS II, 35 f/1.4L, 85 f/1.8, 100 f/2.8L IS Macro, Sigma 50 f/1.4
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themadman
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Jan 03, 2011 20:37 |  #12

None of the photos show up for me...


Will | WilliamLiuPhotography.​com (external link) | Gear List and Feedback | CPS Member | Have you Pre-Ordered Your 3Dx Yet? | HorusBennu Discussion | In honor of Uncle Steve, thanks for everything! 10-5-2011

  
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guntoter
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Jan 03, 2011 20:45 |  #13

Alex_Venom wrote in post #11566984 (external link)
It seems so but it's kinda hard to tell as you showed just 1 photo and didn't describe your methodology.
Try taking more photos, at different distances and check if the behavior is the same. Try the batteries test instead of this lens as subject too...
Are you in MFD?

I agree. You don't take most of your pictures at this distance, do you?

Take some pics of staggered water bottles. Gets the distance closer to the distance you actually talk pics. Focus on the center one and see if you seem to get the same results.
Like this:


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Joel
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egordon99
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Jan 03, 2011 21:01 as a reply to  @ guntoter's post |  #14

So this is your SECOND bad 50/1.4 from B&H?

https://photography-on-the.net/forum/showthre​ad.php?t=980364




  
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m.shalaby
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Jan 03, 2011 21:06 as a reply to  @ egordon99's post |  #15

I'm giving up on the Canon 50 1.4 and going with the Sigma. 2 copies in a row... i'm done.




  
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This is pretty bad Back Focusing, isn't it? (Canon 50mm 1.4)
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