Originally posted by normhead I've been shooting the last few days using audio bombers BiF setting (I have them programmed onto mu U1 slot, I don't even remember what they are, but basically, AFC, focus lock, largest number of AF points etc. the stop was locked a ƒ4.5, the shutter was locked at 1/2000s). Taking pictures of the newly returned humming birds.
So guess what my results were. Like, well, first I'll post the images....
Starting from the lowest going to the highest ISO
320 ISO
640 ISO
1250 ISO
1600 ISO
3200 ISO
MY conclusions, the high ISO performance of a K-3 is not the most important factor in IQ on a K-3. IN fact right to 3200 which is as much as I needed for my preferred settings, (1/2000s and ƒ4.5).
The question to be answered is which is more important out in the real world. Technically better composition etc. ro low noise high ISO. Given that the best image in the set was taken at 1250 ISO, and that both image taken at higher settings are quite manageable, I'm wondering how important high ISO performance really is. In the studio on a test set up, you could see the difference for sure. But that doesn't necessarily translate to the best IQ in the field. From these image, my guess is that ƒ-stop and shutter speed are more important than high ISO performance on a set of image like this.
My guess is that those who want better high ISO, at least for this type of shot are looking for performance over 3200 ISO. Given the K-3 performance at 3200, I'm not even sure keeping the ISO down is even a worthwhile exercise. The higher ISO didn't ruin any images. it was light, framing an timing that made the pictures. ISO was petty much a non-factor. I had to look at the exif to tell which was 340 and which was 3200.
The real world is different than the studio set up for testing.
IN answer to the big question, "is the K-1 going to bring me anything in terms of added high ISO performance without buying new very expensive lenses?" is still very much on the table.
Hi Normhead,
First of all, the pics you shot, and post here are great.
Second, I will shortly jump to your conclusion for ISO and as you said "bothering with stop down to lower ISO values, because everything is great even at 3200 "
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That's true, but only in enough light conditions. As a matter a fact, it's true for all types of sensors as well.
In enough light, sensor can get enough informations, in low light these informations are covered with darkness, and sensor CAN NOT read colors,
and in a way to produce te final image, it will be "washed out, fake, oversaturated, noisy" look like.
So, yes, your conslusion is true, but is generally true for all sensors in enough light conditions.
If you need higher speed, and higher f values - ISO can cover that, but only with enough light.
...
For example, try to shoot your space, or any room, with ISO 100, on a tripod, with long exposure, and you will see, in darkness you cannot make colors,
because there is no light to make them.
You will get proper exposure , but without true colors....