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DPChallenge Forums >> Hardware and Software >> Noisy images from my D70
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Showing posts 26 - 39 of 39, (reverse)
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 01/10/2005 12:47:38 PM · #26
I think Marcos is getting somewhere - this looks like its shot using iso 3200!

Having said that - looking at the Nikon brochure it only says Iso is from 200 to 1600. No mention of any iso boost to 3200..?

Mike

Message edited by author 2005-01-10 12:51:44.
 01/10/2005 12:51:32 PM · #27
The D70 varies ISO in 1/3 increments, so 320 is legitimate, though 200 should have worked fine for the picture in question as well. ISO 3200 is not possible in camera. I too see similar noise in some of my shots, but only noticeable in the out of focus areas.

Originally posted by GoodEnd:
Hi, nsoroma79;

ISO 320 is a bit weird to me. I have read so much over DSLR hardware, include Nikon D70 and can´t remember that it suports Dynamic ISO ranges, like 160, 240, 320 and other setting. But, I know that it suports ISO 3200, througt an ISO Boost feature.

 01/10/2005 12:56:29 PM · #28
Originally posted by nsoroma79:
Originally posted by bear_music:
The original image looks like a cropped-in section to show the "noise"; the tiger looks liek an essentially uncropped full frame image; it's impossible to compare them.

Robt.


I posted the original one in my portfolio.

Please pu the link here, to easy our life!
 01/10/2005 01:27:49 PM · #29
Originally posted by pitsaman:

If you spent 1200 $ on nice camera and you are planing to use Quantaray lenses,you well wasted your money.
Photos taken with your Sony DSC85 will be much better !


I understand that the Quantaray Lenses are manufactured by Sigma and you will find the same lense, with the same features when you look at Quantaray and Sigma product lines.

They are just in-house brands, very similar to Sear's Kenmore line of appliances. Those products allow the retailer to provide special deals/packages that can't be matched by competing companies, even if they are essentially selling the same product.
 01/10/2005 02:30:22 PM · #30
heres my cheap lens/Ugly Photo Its the BIGMA 50-500 again


Message edited by author 2005-01-10 14:30:42.
 01/10/2005 02:43:48 PM · #31
Did you change the colour profile in capture 4.*

I did this once when I changed it to sRGB thinking that way I would not have to change it later and it created noise in the photo for some reason, changed it back to the Nikon one and it was fine again.

01/10/2005 02:52:41 PM · #32
It's funny when you think of it. In film we worry about grain, in digital we worry about noise, six of one and half a dozen of the other. The more things change the more they stay the same :-)

Robt.
 01/10/2005 03:24:07 PM · #33
Hi Lorrie,
Do you have a UV type filter on the end of your lens? If so, is it good quality glass? You might try some shots without it.

I have never been satisfied with the quality of my images when I use other manufacturer's lenses. I don't get, grain, so much as just a loss of over-all quality.

Also, I noticed you are using "spot" metering..... Are you selecting a mid-tonal light area before snapping the picture??? Its very hard to do accurately with fast moving subjects like flying birds. you might want to change from "spot" to "multi-pattern" metering. I generally use the spot metering only when I am trying to fine tune a difficult lighting situation or create an unusual effect.

Keep your ISO as low as possible (General rule)
I hope this helps you to figure it out.
01/10/2005 03:32:14 PM · #34
What ever you guys said ,but the rule is "the lens" !

Here is anothe sample with good 200 mm lens at 400 ISO:

01/10/2005 03:38:15 PM · #35
A couple of points to consider.

I recently noticed having a similar problem on photos shot on the same day. While shooting a bird with the sun in front of me but the sun was obscured by clouds, the photos were similar to your bird image. Then moments later shooting with the sun light behind me, and no clouds, the photo was more detailed like the tiger.

If you shoot with auto-setting activated, since you have lots of birds, try shooting them with the sun in front, behind, cloudy and clear then compare. Then when possible adjust your position to suit the lighting.

Regarding the tiger and bird comparison: The tiger photo has so much detail you would not see 1 pixel noise very easily. The smooth background of the bird photo makes slight variations more obvious. Also it appears the bird was in indirect light and the tiger had direct light.
 01/10/2005 03:58:12 PM · #36
Fulgent,
I agree her lighting is less than ideal on the picture she is showing, but that camera should be able to take fantastic low light shots without grain.

This is why I think her metering selection could be a big factor along with quality of glass. If she spot meters on too dark or too light of an area, the rest of the picture will suffer the exposure compensation. This could create grain problems even at a 300 or 400 ISO. It takes a little practice to use the spot meter mode. She shouldn't be having problems with grain on a D70 even at ISO 600
 01/10/2005 05:18:10 PM · #37
Are you using manual focus? If so, check that little diopter slide, that next(right side) to your eyepiece, I've accidently moved that before and couldn't figure out why all my images were out of focus. It might explain, but maybe not.
 01/10/2005 05:42:28 PM · #38
Truth be told, I think this is not a good comparison at all.

The Tiger was taken with a smaller aperture, giving the sensor the ability to better define contrasts in color and shadow. The bird was taken with a wide aperture creating our famous bokeh effect, but when the sensor is set to auto-sharpen, it tries like heck to make sense of the out-of-focus region and interpolates a lot of varied shades as what we see being noise. The effect is much worse when shooting JPEG as the camera now needs to compress the image and even more detail is 'fudged' in the process.

One of the key points to making sure your Nikon is not so noisy is to shoot in AdobeRGB 1998 color scheme. Only after you bring the shot into Photoshop and make your edits and clean up, should you then revert to the sRGB color scheme (and that is only for web postable graphics)!

Think of it this way, the camera has three boxes of crayons to use to render your image. sRGB is the 16 color box, AdobeRGB1998 is the 128 color box. Off the top of my head, I can't really remember the other one, but it is a Nikon Scheme meant to simulate Adobe's 1998.

Which do you want your negative to remember to color with?

Message edited by author 2005-01-10 17:44:32.
 01/10/2005 05:48:11 PM · #39
Originally posted by nsoroma79:
Originally posted by pitsaman:

Cool down man,I don't see any sensor noise on that sample,just very soft focused distorted image.


So, now what would cause that? Sorry for being so dumb, I just don't understand why the big difference. :)


The focus appears to be on the wing and not the eye. Soft focus can appear like noise. The eye and head here just appear to be out of focus, not noisy.
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