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FORUMS Photo Sharing & Discussion Critique Corner 
Thread started 10 Nov 2009 (Tuesday) 11:48
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Sigma 120-300 C&C

 
carshop
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Location: Ontario, Canada
     
Nov 10, 2009 11:48 |  #1

I need your C and C to let me know if these shots are sharp.
These are random shots in my backyard, as is, untouched.

Center Focus Point was on the higher nail.

IMAGE: http://i170.photobucket.com/albums/u263/9058377799/IMG_3471.jpg

Center Focus Point was on the knot.
IMAGE: http://i170.photobucket.com/albums/u263/9058377799/IMG_3469.jpg

Center Focus Point was on the "o".
IMAGE: http://i170.photobucket.com/albums/u263/9058377799/IMG_3479.jpg

ShawnSmugmug (external link)/Flickr (external link)/LikeMyFacebook (external link)
Canon 70D Gripped|
Canon 70-200 2.8 IS|Canon 24-105|Canon 18-135
Canon 580 EX II|Sigma 18-50 2.8
Canon 55-250|Sigma 17-35 2.8| 2 Pocket Wizard II

  
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lundgrenj
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Location: Utah
     
Nov 10, 2009 11:54 |  #2

Look sharp to me.


Canon 7D, 6D

  
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Robert_Lay
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Nov 10, 2009 22:13 |  #3

After downsampling and downsizing an image to a resolution less than 1 megapixel, it is no longer practical to use that image to determine sharpness.

It is also impractical to post pictures of 5 or 10 MP at their full resolution and still be within the file size constraints of this forum.

It is necessary to post a full detail, 100 percent crop of some small portion of the image in order to give viewers the same level of detail you see on the full size, full resolution image.


********100 percent Crop Using Photoshop Crop Tool*********
See my tutorial on making a 100 percent Crop with Full Detail in the following thread:
https://photography-on-the.net …thread.php?t=34​606&page=2

********100 percent Crop Using Photoshop Rectangular Selection Marquee Tool*********
Select the marquee tool - then in the options palette select Style->Fixed Size - key in 200 px X 200 px. Click with the marquee tool anywhere in your image, and drag this around the screen to the desired location. Use Image -> Crop to make the actual selection. At this point you have a full detail, 100 percent crop of the original image which when posted will give the viewers the same level of detail that you see in your original.


Bob
Quality of Light (external link), Photo Tool ver 2.0 (external link)
Canon Rebel XTi; EF-S 10-22mm f/3.5-f/5.6 USM; EF-S 18-55 mm f/3.5-f/5.6; EF 28-135mm f/3.5-5.6 IS USM; EF 50mm f/1.4 USM; Canon Powershot G5; Canon AE1(2); Leica R4s; Battery Grip BG-E3; Pentax Digital Spotmeter with Zone VI Mod & Calibration.

  
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griptape
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Nov 10, 2009 23:17 |  #4

At this size, they seem as sharp as I would expect from that lens. The only thing that bothers me is that bright streak running through the third image on the right hand side. Was that a lighting anomaly or has that shown up in other images as well?




  
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Sigma 120-300 C&C
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