Thread: Canon 7D Soft Focus
04-07-2010, 06:24 AM #1
Canon 7D Soft Focus
04-07-2010, 12:33 PM #2dPS Forum Member
- Join Date
- Jan 2010
- Rhode Island
I noticed that the ISO was 3200 and a shutter speed of 1/4000. The camera applies a pretty heavy noise reduction to higher ISOs which softens the image. You could have had a sharper image by using using 400 ISO and 1/1000 or 200 ISO and 1/500.
I went from a 10MP XTi to a 15MP 50D a few weeks ago and when looking at 100% view also thought my images were softer than with my old camera. By zooming out to a 66% view which matches the image size of the Xti I realized that the images are as sharp or sharper. When pixel peeping all those extra pixels make anything not absolutely perfect much more apparent. The other thing I needed to do was use the AF micro adjustment to correct some back focusing.
Hope that helps!
04-07-2010, 02:18 PM #3
Yup, that's heavy noise reduction from being at 3200ISO. You're on the beach at mid-day, you'll be fine. Just as an indicator, here are equivalent exposures (with the aperture remaining the same).
ISO TV AV 100 125 f/5.6 200 250 f/5.6 400 500 f/5.6 800 1000 f/5.6 1600 2000 f/5.6 3200 4000 f/5.6
If you had a faster lens (say an f/2.8 zoom or f/1.4 prime) you could drop things down another 2 and 4 stops (respectively). Of course, you cant get the ISO any lower, so your shutter speed would go up.
04-08-2010, 12:33 AM #4
I definitely agree, that may have been a bad example, sorry.
I know that there was some major noise, and that by softening it I lost a lot of detail, but on most of the other shots, the ISO was strictly set to 100. This was sort of an impromptu shot after I was shooting in the jungle and turned the camera off.
But on the other images, the ones with ISO set at 100, even using a 50mm and flash, the shot's are very soft.
04-08-2010, 01:22 AM #5