noise and tone in this sunrise picture.

[laurel2sg]

Hi,



Camera: Pentax K10D
Exposure: 0.25 sec (1/4)
Aperture: f/11.0
Focal Length: 35 mm
ISO Speed: 100
Exposure Bias: +1 EV

I put ISO at 100 but see some noise in the picture. How could it be?
You can see the larger picture on my Flickr: Flickr: NhÃ*m Æ°á»›t's Photostream

I retouched it with iPhoto 9, put denoise to the highest, and reduce the EV - 1/3, very little higher contrast and saturation.

Thanks.

[hey joni]

If you used too much sharpening, you may have sharpened the noise too.

Did you de-noise before or after sharpening?

Also, you can scan it through the noise filter a few times if you save the raw to tiff then put it back in. Be careful though as you lose definition too.

[Murtasma]

F11 is probably too stopped down especially since it's pretty obvious this image has hand held. If you did use a tripod be sure to use a shutter release cable or at least the time as to not shake the tripod, you may also need to get a better tripod for your camera if you did infact use one here. I'm really not seeing much noise in the image, but I do see a lot of blurriness. This is because of your aperture and ISO selection. At 1/4 of a second you need to be using a tripod for an image like this. If you want to handle hold a shot like this open your aperture up to to something like F3.5 and use a higher ISO to maintain a shutter speed fast enough to handle hold. This setting will depend on your focal length and if your camera has image stabilization but you something like 1/60th of a second or faster should be a good starting point.

The tree in on the left of the frame also distracts form the image. I would have tried to compose the image to remove this tree or at least minimize it so you can crop it out with out loosing much of the image.

[laurel2sg]

Thank you, Murtasma and hey joni for your replies.

Yeaps, I'm sure need a better tripod and yeah, I might just stop f down to about 5.6 or 8 instead of 11. I hate the blur in this picture alot but it might not be rescued by pp because too much blur.

Thanks for your comments.