What would make a photo like this?

[o2sensorheating]

As the topic states. i took this shot this afternoon and i havent touched the photo in any editor. What could make it create lines like that on the right side of the photo and grainy overall?

http://i128.photobucket.com/albums/p178/joejuran/IMG_0249.jpg

[Flo]

What were your settings for this?

[o2sensorheating]

Exp (1/2500)
f/7.1
iso 1600
50mm focal length

[bill boehme]

ISO 1600, 1/2500 second, and aperture of f/7.1 (from EXIF data) would probably be the reason. Why not use ISO 100 and a shutter speed of 1/160 second for the same exposure level at a less grainy ISO. In addition, the image is underexposed which will also cause increased noise. Most of the noise that I see is in the very dark areas and is the result of "blocking", an effect that is similar to posterizing in its appearance.

[|)\/8]

Not sure what lines you are talking about, but the graininess (noise, in digital terms) is caused by the fact that you shot this at ISO 1600. Your EXIF data shows ISO 1600 and shutter speed of 1/2500 @ f/7.1 which is totally unnecessary for a flower that is not moving.

You probably could have taken a much better photo using ISO 100 with your aperture wide open (less DOF). As long as you can obtain a proper exposure at a shutter speed higher than the focal length of your lens so that you do not get motion blur.

[o2sensorheating]

great thanks! the only reason i was shooting at a higher iso was because the flower was shifting due to a light breeze. but i guess thats what caused it. thanks again

[bill boehme]

I took a second look to try to find the lines that you are referring to. Since the image is underexposed somewhere between 2 EV and 3 EV, I presume that you may be referring to the dark frame noise which is a background thermal noise characteristic of the sensor ... in fact, all semiconductor devices have a "noise floor" that is a function of temperature. When an image is severely underexposed as this one is, the sensor is operating very close to that floor.

[o2sensorheating]

very interesting, im heading back there tomorrow to re-take this shot until i get it right! :)