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Thread started 25 Nov 2015 (Wednesday) 16:19
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6D/135L Soft Images

 
OZS2KCA
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Nov 25, 2015 16:19 |  #1

I recently started noticing that my 6D/135L combo started giving me soft images. Unless, my vision is going bad. :lol: Here are a couple of of recent images. I hope I'm not freaking out for nothing, but I remember this combo giving me better results. What do you guys think?

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dodgyexposure
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Nov 25, 2015 18:01 |  #2

With the 135, the first port of call is usually shutter speed, but your posted images should be fast enough that that isn't the problem.

Perhaps the AF has drifted out of calibration . . . have you tried adjusting the AF?


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MMp
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Nov 25, 2015 18:38 |  #3

These types of images are terrible to use for judging g AF accuracy and sharpness. You truly have no idea where then lens/camera was attempting to focus. You should set the camera on a tripod, manually defocus the lens, and then hit the AF/shutter release. Your subject needs to be something more flat with a broader surface area lying in a single plane perpendicular to the lens. At f/2 it is very likely you simply swayed forward or backward just as you were hitting the shutter.


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Left ­ Handed ­ Brisket
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Nov 26, 2015 08:30 |  #4

mannetti21 wrote in post #17796831 (external link)
These types of images are terrible to use for judging g AF accuracy and sharpness. You truly have no idea where then lens/camera was attempting to focus. You should set the camera on a tripod, manually defocus the lens, and then hit the AF/shutter release. Your subject needs to be something more flat with a broader surface area lying in a single plane perpendicular to the lens. At f/2 it is very likely you simply swayed forward or backward just as you were hitting the shutter.

yup. and at the camera-subject distances we are looking at here, DOF is razor thin.

http://www.dofmaster.c​om/dofjs.html (external link)

at 8 feet you're looking at 1.4 inches of "acceptable" focus


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cpam.pix
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Nov 26, 2015 13:37 |  #5

I'm guessing there's a bit of front focusing going on here.

The element of each picture that is in [razor thin] focus is in the forground.

Check your micro-focus on a continuous surface (yardstick or piano) with a single focus point. If that confirms front focus, set it a couple clicks to the back.

I'm looking forward to learning if this is an adjustment problem or not.

Thanks for sharing your work.


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70-200L, 28-70L, 24-105L, 300L, 50, 10-17 fish, 2.0x TC
Image editing OK, encouraged, and expected. Thank you for helping me learn!

  
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FarmerTed1971
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Nov 26, 2015 13:41 |  #6

At f2 what did you expect?


Getting better at this - Fuji X-t5 & X-t3 - 16 1.4 - 35/50/90 f2 - 50-140 - flickr (external link) - www.scottaticephoto.co​m (external link)

  
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