I know that some of you are tired of hearing about K-5 focusing problems, but I've been going crazy analyzing my photos in an attempt to come to some conclusions about the inconsistencies in the AF behaviour of my K-5 (FW 1.03). I have a zillion questions, but I'll start with the one here.
Please have a look at
K5_S2896+CR.jpg - File Shared from Box.net - Free Online File Storage. This is a 100% crop (Tamron 28-75/f2.8 at 28mm, f9.5, 1/500, ISO 200) created from DNG by ACR, with ACR defaults, except Fill set at 60 (so that the dark face is visible), and sharpening OFF. This particular image was chosen due to the amount of foreground visible, which should help with question #1 below.
Can anyone help with the following, please:
1. What do you believe to be the plane of focus?
2. Why is there so much noise at ISO 200? (Specifically, the dark skin. View image at greater than actual size.)
About #1: At 28mm and f9.5, the DOF is huge, but it seems to me as if almost everything in the picture is more in focus than the intended subject
This, of course, makes no sense, but that's how it looks to me. Feel free to tell me otherwise. I'd think that at SS of 1/500, subject motion is unlikely to be a factor.
About #2: Yes, the dark skin was underexposed, hence we expect more noise, I suppose. But it does seem excessive for ISO 200, and also, we've seen some wonderful resurrections of extremely underexposed photos, yet I'm unable to replicate such results.
Your comments would be appreciated.