Originally posted by Quicksand LOL, I'm honestly not sure who would ever use 819200 for any purpose at all. There are basically no details left behind that purple and green grainy/blotchy haze. Not to mention - can you even see what you're photographing?
I can imagine some use cases for 204800, and maybe even 409600 (very small monochrome newspaper single-column shots). But 819200 is crazy.
EDIT: I actually like the blotchy pattern though. Maybe I'll take a 1:1 crop and use some of it as my Windows wallpaper.
I quite agree that I'm not likely to us 819k ISO, but I don't use the highest numbers on my present cameras others. What I do see is evidence that it will work and provide nice photos at higher ISO's than existing models.
This is progress. I remember being excited when I learned how to cook TRI-X in the darkroom and get 800 out of it. I've purchased almost every top end Pentax ever made beginning with the Spotomatic---oh did I like
an auto coupled light meter, though the K2 was my all time favorite film model. what I've seen in the digital models is steady improvement in low light abilities with the possible exception of the K10 which I regarded as
really lame in low light situations. I now have a K3 and a K1 as cameras of choice, as I have sort of migrated into bird photography.
What I'm finding is that decent bird photos are becoming progressively easier. Birds, it seems, commonly roost in the shadows which has made photographing them difficult and expensive.
implying that my lens collection has such monster lenses as the A-400 f/2.8 -- one of my all time favorites as well as an FA-600 F/4. These are the 16" guns of the navy. They shoot long and hard
IF you can bring them to bear before the target is long gone.
I'm now using ISO 6400 pretty much as my default setting on the K3 and the K-1. IF this new model enables a few higher f stops it will we more than welcome. It means more and more bird photography can
be hand held with affordaable light weight optics.