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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 10 Jun 2014 (Tuesday) 12:01
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Photos slightly out of focus

 
Bruce ­ R
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Jun 10, 2014 12:01 |  #1

I am new to forum, but couldn't find a good answer to my question. I have a Canon 30d (a bit old...I know) and a 24-70 F2.8L and a 70-200 F4.0L lens. Neither lens has IS. I bought the camera in late 2007 and haven't had any problems. Just got back from a vacation where I primarily used the 24-70 lens and some of the photos were a little out of focus. The only issue I have ever had with this lens is that the photos were a little soft when I bought the lens. Sent it back to Canon in 2008 and have had no problems since. To test the lens, I have taken photos of my mailbox at various apertures (2.8, 4.0, 5.6, 8 and 11). I have taken photos at 24, 28 and 70 mm. I also took photos with my 70-200 lens of the same subject at f4, 5.6, 8 and 11. Photos were at 70mm. All photos are slightly out of focus. Comparing the f4 and f11 on the 2 lens at 70 mm, the photos look almost identical at 100%. I also had an old lens 28-135 (F3.5-5.6). Took photos of same subject and compared to photos taken with the 24-70 lens and they looks very similar (24-70 was slightly better which is understandable considering it is an "L" lens).

I was also concerned about front/back focus problem. I lined 5 "AA" batteries on a table at a 45 degree angle to the camera and spot focused on the middle battery. Sharpness of the back vs front battery looked similar.

Are there any other test I can run? I just want to know whether it is a camera or lens issue. If it is the lens I can send it back to Canon and get it repaired. I don't want to get the lenses back and then realize it was the camera. Any thoughts? Would a "bad" camera cause the issues I am seeing.

If you need to see photos let me know. I could probably post them this evening.

Thanks in advance for your help.




  
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stevo67
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Jun 10, 2014 12:11 |  #2

Do you have any examples of the pics that you could upload for us to see?

Steve.




  
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gonzogolf
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Jun 10, 2014 12:13 |  #3

It might help if you posted a photo with the exif attached. More often than not the problem is with insufficient shutter speed and motion blur, especially if you are having an issue with more than one lens.




  
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Bruce ­ R
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Jun 10, 2014 12:28 as a reply to  @ gonzogolf's post |  #4

I am work now, and should be able to post some photos tonight. Also, as for camera shake, the vacation pictures were typically taken with a shutter speed of 250 or faster. As for testing the lens, the images were taken on a tripod with a shutter delay to eliminate camera shake.




  
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rrblint
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Jun 10, 2014 13:03 as a reply to  @ Bruce R's post |  #5

Yeah, I look forward to seeing your photos tonight. On the battery test, which battery appeared to be in best focus?


Mark

  
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John ­ from ­ PA
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Jun 10, 2014 14:07 |  #6

Bruce R wrote in post #16963358 (external link)
I am work now, and should be able to post some photos tonight. Also, as for camera shake, the vacation pictures were typically taken with a shutter speed of 250 or faster. As for testing the lens, the images were taken on a tripod with a shutter delay to eliminate camera shake.

Try to insure the EXIF information remains intact.




  
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Bruce ­ R
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Jun 10, 2014 17:16 as a reply to  @ John from PA's post |  #7

Attached are photos I took with 2 different lenses. Both are at 70 mm. The photo with "a" at the end of the file name was taken with 70-200 lens; the other pic with the 24-70 lens.

Both photos were taken on a tripod using a shutter delay to avoid camera shake.


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Bruce ­ R
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Jun 10, 2014 17:24 as a reply to  @ Bruce R's post |  #8

Some more photos taken on different day. The attached photos were both taken at 28mm. One with a 24-70 lens and other with a 28-105 lens. All photos were taken with a tripod with a shutter delay.


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Bruce ­ R
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Jun 10, 2014 17:37 as a reply to  @ Bruce R's post |  #9

The batteries were placed at approximately a 45 degree angle to the camera. The batteries are approximately the same distance apart. I focused on the middle battery. Photos were taken on a tripod with a shutter delay.


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Bruce ­ R
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Jun 10, 2014 17:39 as a reply to  @ Bruce R's post |  #10

In short, why aren't these pictures very sharp. They seem slightly out of focus. Is this more likely to be a lens or camera issue




  
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morph2_7
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Jun 10, 2014 17:44 |  #11

They all look ok to me.




  
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Bruce ­ R
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Jun 10, 2014 17:55 as a reply to  @ Bruce R's post |  #12

Photo doesn't look in focus. Thoughts?


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Bruce ­ R
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Jun 10, 2014 17:56 |  #13

It's just when you zoom in 100%, they seem to be off.




  
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Bruce ­ R
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Jun 10, 2014 18:01 as a reply to  @ Bruce R's post |  #14

This photo was taken at f9 with a 24-70 f2.8L lens. There doesn't appear to be anything in sharp focus.




  
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Bruce ­ R
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Jun 10, 2014 18:01 as a reply to  @ Bruce R's post |  #15

Helps to upload the photo....


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Photos slightly out of focus
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