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Forum: Pentax K-1 03-10-2017, 02:37 AM  
Was I expecting too much?
Posted By BarryE
Replies: 56
Views: 5,446
Do we have to get hung up about all this. Most of us know that adding and removing pixels via any of the resampling/interpolation algorithms changes the image. Processing can then correct this, somewhat. This is why the adding/removing pixels is done at the start of a workflow. Just changing the the image so it will print differently changes nothing - no pixels are harmed in this process. We know this.

Noise is noise. It is worked out of an image in many ways via intelligent processing - not just sliding a slider here and there. Best not to get it in the first place, but it is often overrated. (Noise can be, however, very effectively used to good effect.) Often noise is the result of high ISO being used - high ISO kills the dynamic range. This personally is why I don't like high ISO, not noise, but what it does to the dynamic range. DR can be carefully eased back into an image with curves and masks etc, but it is less than idea.

Get it right in camera, wherever possible, then process the problems away where possible.

Keeping noise down generally - in forums too - is a good idea ;-)
Forum: Pentax K-1 03-09-2017, 03:28 AM  
Was I expecting too much?
Posted By BarryE
Replies: 56
Views: 5,446
Agreed Clackers, go for the cleanest image to start with.

My point, probably poorly made, is that the initial noisy image, when reduced, will have a proportion of pixels discarded. The remaining images will still have noise. Then depending on the image, subsequent processing, particularly at the output sharpening stage, can make an original noisy image look much better. It is harder to achieve this when interpolating an image. Been working with images in PS and Illustrator for years since I was employed to do this stuff. Guess we both know what we're trying to say, only I sometimes just type and don't think too hard ;-)
Forum: Pentax K-1 03-09-2017, 02:25 AM  
Was I expecting too much?
Posted By BarryE
Replies: 56
Views: 5,446
Careful. It isn't that straightforward, really. If you resize, either up or down, noise matters, especially when you do the final output sharpening, which is required in all workflows. The different algorithms used to resize, sharpen (and there is a choice here) as well as the noise processing whilst sharpening, all effect the final output, be it screen or print. So saying there is no change in noise might be a little misleading. Just adding my pennies worth ...
Forum: Pentax K-1 03-07-2017, 08:10 AM  
Was I expecting too much?
Posted By BarryE
Replies: 56
Views: 5,446
Me too Mee. I had a K-5, upgraded it to K-3 and now onto a K-1. I think of my K-1 as a super-sized K-5, without the lens choice. The performance is similar to the K-5, but the K-1 offers the greater cropability and 1:1 at a higher res, which is what I wanted. The k-5 was/is a great performer, especially when, like me you use your camera in "slow-mode" (ie base ISO/timer/MUP/tripod etc).

I was surprised at how similar the K-1's performance was to the K-3 in slow-mode in fact. Nigh on identical. This initially, disappointed me, but I've started working a little differently and adapting to the K-1's greater flexibility, especially as I can use ISO up to 800/1600, which has bought me a couple of stops over the k-3 - plus the important cropability. The move from the K-5 to the K-3 caused similar consternation, as the noise was initially "terrible" in comparison, but I adapted. Now the K-1 is back to the K-5 performance in slow-mode, but with some very useful extras ... and heavy lenses :-(

Guess you'll find the K-1 frees your technique up a little. I'm using mine (sometimes) in "walkabout" mode on a monopod. Still sloooow, but now I can use shutter speeds down to 1/30 or so safely, and with the extra ISO range I'm almost getting what I was getting with the slow-mode on the K-3, but with lots of usable extra pixels (potentially) ...
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