Originally posted by stormtech My eyes are getting older.....re: ISO
I had to hold a pen up to my monitor to count the zeros there to be sure....
Is that image really taken at twenty thousand ISO?
I've been lurking around here for a few weeks - that image alone, taken with an ISO of 20000 is probably the game changer for me.
Now to see what I can sell to help pay for a K-5........
That, and my wife just loves all the Otis shots - should I tell her I bought a K-5 so I can take more squirrel shots?
I had to count them too. Yes, that is ISO 20,000. That's what the camera is reporting anyway. They aren't all that nice though, there Was some daylight falling on the dog the dog when I took the shot and that's the key to it, it seems. I think it picked 20k because I spot meter, Av, Auto ISO (range from 80 - 32000), and for metering Black, such as the dogs hair, EV of -1 to -2. If there Was no light, there Would be more noise. Whitness the dogs housemate, a Burman cat, Same room, but with far less light.
K5JS8409_mA35105_SiJ_July4_2011 | Flickr - Photo Sharing!
Camera Pentax K-5
Exposure 0.006 sec (1/160)
Aperture f/5.6
Focal Length 50 mm
ISO Speed 6400
Exposure Bias -1.3 EV
Flash Off, Did not fire
The shot of the dog had to be pulled back about a stop between exposure and recovery, the shot of the cat had to be Pushed about a stop. When you have underexposure with that high of an ISO, you Do get Noise. However, in most cases I've run into, it is quite controllable. Still having EV comp set to -1.3 and metering a (basically) white cat, it doesn't surprise me I had to push the exposure. There is just enough NR applied with ACR to avoid making her look like a ceramic figurine.
Shots like this in similar conditions may be possible with other cameras but the K5 certainly make them a joy to take, process, and share.
BTW... Ignore the focal length. These were done with a Manual zoom and that's just the number I plug in when I turn on the camera. I could not tell you what the actual FL was, only that it's somewhere between 35 and 105 mm.