All Forum Comments
I must say, what a fantastic explanation and breakdown of detailed information. I am absolutely stunned and overjoyed with what you two have just explained me. Its almost like a light bulb went on into my brain and suddenly grasped every single detail of things you have written.
Often people understimate others and instead of going straight using technical aspects to explain something they wander around and give the brief and short account of things, but you two didn't have qualms in going straight to the physics aspects of it, and I absolutely loved grasping it.
These are the sort of things that even if I had managed to start shooting the correct way by doing the modifications my curious mind would have wanted to search for the scientific aspects of whys and hows and I would have dug out info regarding this matter. But you just gave it to me in the plate.
What you two have just offered me here in terms of knowledge has just helped me go one notch up in skills and confidence to be behind the lens and feel absolutely wonderful . Knowledge acquired is definitely a beautiful sensation, and blessed are the ones who have the patience and skills to transmit them.
Thank you ever so much again for your help.
Now all I need is some more goldies to shoot.
Comment by aminstar posted on Image noise on K20 at 19/05/2009 - 14:00
Where are you from? Filling the location is quite helpful so that we may know what part of the world you come from
People are very friendly and helpful here. A great place to lay your hat and sit for a virtual coffee, but the members are real, nothing virtual about us
Best option in these situations where the scene is basically static and the lighting doesn't change much - use manual
Matt
Comment by aminstar posted on Image noise on K20 at 19/05/2009 - 13:30
So - the noise levels are what I'd expect from the K20D (and in normal circumstances are perfectly acceptable for even large prints in the real world). However, as stated you are pushing both the exposure and crop which is exacerbating the noise issue
HTH!
Matt
Normally I wouldn't attempt a capture at that distance and under that light. But on this occasion I wanted to be on the safe side meaning wanting to make sure the noise levels were as expected, just like you mentioned Matt. Now from here it can only be better because I rarely shoot at 1600, if ever, and when I do its with slightly better lighting even and also slightly closer. So this added to a slight EV compensation I think I will be on the right track.
Thank you so much for all your kind help and input. Learnt something new today and I can start implementing
Comment by aminstar posted on Image noise on K20 at 19/05/2009 - 13:28
Recommendations:-
1: Expose to the right of the histogram. That is, err on the slightly overexposed (but without blowing out highlights). To help achieve this, set your camera's EV compensation to +0.7 and try it for a while. The resulting image from a corrected overexposure is far superior to that from a corrected underexposure.
Peter, I have indeed noticed that on occasion when I increased the exposure to +1 I remember seeing better results when the ISO was bumped high.
I will give it a try
thanks for the advice
Comment by aminstar posted on Image noise on K20 at 19/05/2009 - 13:23
I'm confused. When I click on your links Amin, I see a .jpg version. When I right click > Save As, I get a .tiff file.
Wos apnin?
The links are for PEF files
and the image is a jpg obviously
Comment by aminstar posted on Image noise on K20 at 19/05/2009 - 12:50
Noise removal in RAW conversion software varies immensely.
I have perfectly acceptable results with Silkypix at up to ISO2500. Some noise, yes, but definitely acceptable. I have a lovely 18"x12" print taken at ISO3200 from the K20D.
I'll try and dig out a scan of Fuji ISO 1600 film to show what noise really was like
(Might check out your image later...)
Matt
I will try to open the ISO 1600 RAW file with silkypix.
My trouble with silkypix though is the settings. There are so many bits and pieces there that I get totally lost, its not like Ninja that I just load the profile.
Or is there something in the Silkypix that I can just load and keep it as standard for most images and then I can just tweak a little individually when I want to?
Seems like silkypix is more for people like you, professionals that know exactly what those bits and pieces and settings are. As for me I get headaches by just shuffling the menus
But sure wish I could understand a bit more of it so I could get some better results and not get such a phobia of bumping the ISO
Comment by aminstar posted on Image noise on K20 at 19/05/2009 - 12:40
Thank you for your help
Comment by aminstar posted on Image noise on K20 at 19/05/2009 - 08:57
Here is an image shot at 800 ISO this morning. Ran through Ninja, actually I ran it twice, first time used the brush to keep the subject isolated so that its not affected with the noise engine, but then ran again because the background looked still noisy to me.
Original image in RAW at ISO 800 is here
This is at ISO 1600 here
this is the final image I managed to get after Ninja twice

Any help in order for me to understand or put my mind to rest about the noise would be greatly appreciated.
Amin
Comment by aminstar posted on Image noise on K20 at 19/05/2009 - 08:44


Hello and welcome!
PS, Amin, if you're gonna suggest filling in the location status you should fill yours in too as it's blank!
Thanks for bringing it to my attention Danny. Off I go to fill that one up.
Now let me think, where on the planet exactly am I? ha lol