Posted by Ian Butler on October 16, 2009 at 3:43 PM
Hi all
Since there has been a lot of questions about the High ISO rating of the 7D I thought i would post a quick shot of one i took at ISO800 the other day.
Ive tried to do a 100% crop of an unmanipulated image that was taken in Large JPG. This is straight out of the camera.
If anyone could let me know how to pull a 100% crop from a pic ill sort it out and post it below.
Regards
Ian
File Name IMG_0331.JPG
Camera Model Canon EOS 7D
Firmware Firmware Version 1.0.7
Shooting Date/Time 01/01/2000 00:12:59
Owner's Name
Shooting Mode Aperture-Priority AE
Tv( Shutter Speed ) 1/320
Av( Aperture Value ) 6.3
Metering Mode Evaluative Metering
Exposure Compensation -1/3
ISO Speed 800
Auto ISO Speed OFF
Lens EF100mm f/2.8 Macro USM
Focal Length 100.0mm
Image Size 5184x3456
Image Quality Fine
Flash Off
FE lock OFF
White Balance Mode Auto
AF Mode AI Servo AF
AF area select mode Manual selection
Picture Style Faithful
Sharpness 0
Contrast 0
Saturation 0
Color tone 0
Color Space sRGB
Long exposure noise reduction 0:Off
High ISO speed noise reduction 0:Standard
Highlight tone priority 0:Disable
Auto Lighting Optimizer 0:Standard
Peripheral illumination correction Enable
File Size 4896KB
Dust Delete Data No
Drive Mode High-speed continuous shooting
Live View Shooting OFF
Posted by JMACTAVISH on October 16, 2009 at 4:27 PM
Take the original pic into PS and zoom it into 100%.
Select the rectangular marquee tool and set it to fixed size 720px x 480px then click on the image and you will get a selection the size required for here, crop along the dotted line with the crop tool and as the french would say "voila"
On your shot;
It looks underexposed by about half a stop and looks to be out soft everywhere.
Underexposed is good for testing noise, as it tends to show up more when you adjust exposure, especially in shadow areas.
Softness is odd especially if you have shot in jpeg, looks more like how i'd expect a raw file to look, i.e w/o camera sharpening etc.
Most cameras will now shoot pretty noise free at iso800, better to test at 1600 if you want to see where the problem areas will be.
What other bodies have you used prior to the 7D? if 1 series, how does the AF compare?
John
Posted by Phil Shaw on October 16, 2009 at 5:33 PM
This looks similar to the 50D. I won't use my 50D above iso 400 because of the higher iso noise characteristics, nor will I use it stopped down beyond f11.
Posted by Ian Butler on October 16, 2009 at 6:38 PM
Thanks for the reply John.
Yeah, its pretty much how I did it really so the above image is 100% at 720x480.
The compression to webuse has softened it loads because the original is slightly soft but not this soft. Wasn't the best photograph to choose but the only one that was sharpish at high ISO.
I dont own any 1 series bodies as they are out of my price range but I have shot 1D mk2, 1ds Mk2, and 1d mk3, on occasions and I would say after my brief spell with the other cameras I think the 7D focus is in their leagues. Its massively better than the 40D I used to use and doesnt lose focus whatsoever when tracking subjects against backgrounds, regardless of how big the subject is in the viewfinder. I've attached a 100% crop of a meadow pipit photographed at ISO640.
As for the ISO I shall try it at 1600 and post some in the next couple of days.
Discussion
3 repliesSince there has been a lot of questions about the High ISO rating of the 7D I thought i would post a quick shot of one i took at ISO800 the other day.
Ive tried to do a 100% crop of an unmanipulated image that was taken in Large JPG. This is straight out of the camera.
If anyone could let me know how to pull a 100% crop from a pic ill sort it out and post it below.
Regards
Ian
File Name IMG_0331.JPG
Camera Model Canon EOS 7D
Firmware Firmware Version 1.0.7
Shooting Date/Time 01/01/2000 00:12:59
Owner's Name
Shooting Mode Aperture-Priority AE
Tv( Shutter Speed ) 1/320
Av( Aperture Value ) 6.3
Metering Mode Evaluative Metering
Exposure Compensation -1/3
ISO Speed 800
Auto ISO Speed OFF
Lens EF100mm f/2.8 Macro USM
Focal Length 100.0mm
Image Size 5184x3456
Image Quality Fine
Flash Off
FE lock OFF
White Balance Mode Auto
AF Mode AI Servo AF
AF area select mode Manual selection
Picture Style Faithful
Sharpness 0
Contrast 0
Saturation 0
Color tone 0
Color Space sRGB
Long exposure noise reduction 0:Off
High ISO speed noise reduction 0:Standard
Highlight tone priority 0:Disable
Auto Lighting Optimizer 0:Standard
Peripheral illumination correction Enable
File Size 4896KB
Dust Delete Data No
Drive Mode High-speed continuous shooting
Live View Shooting OFF
Select the rectangular marquee tool and set it to fixed size 720px x 480px then click on the image and you will get a selection the size required for here, crop along the dotted line with the crop tool and as the french would say "voila"
On your shot;
It looks underexposed by about half a stop and looks to be out soft everywhere.
Underexposed is good for testing noise, as it tends to show up more when you adjust exposure, especially in shadow areas.
Softness is odd especially if you have shot in jpeg, looks more like how i'd expect a raw file to look, i.e w/o camera sharpening etc.
Most cameras will now shoot pretty noise free at iso800, better to test at 1600 if you want to see where the problem areas will be.
What other bodies have you used prior to the 7D? if 1 series, how does the AF compare?
John
Yeah, its pretty much how I did it really so the above image is 100% at 720x480.
The compression to webuse has softened it loads because the original is slightly soft but not this soft. Wasn't the best photograph to choose but the only one that was sharpish at high ISO.
I dont own any 1 series bodies as they are out of my price range but I have shot 1D mk2, 1ds Mk2, and 1d mk3, on occasions and I would say after my brief spell with the other cameras I think the 7D focus is in their leagues. Its massively better than the 40D I used to use and doesnt lose focus whatsoever when tracking subjects against backgrounds, regardless of how big the subject is in the viewfinder. I've attached a 100% crop of a meadow pipit photographed at ISO640.
As for the ISO I shall try it at 1600 and post some in the next couple of days.
Hope this helps.
Ian