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Forum: Pentax DSLR Discussion
12-15-2015, 05:10 AM
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DXOMark shows the same signal-to-noise ratio when compared at the same resolution and/or the same print size. There are a couple of errors people make in comparing K-3 and K-5 files:- viewing on a computer at pixel level, which is unfair to the higher megapixel camera
- K-5 family have non-optional noise reduction at ISO's above 1600
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For a valid comparison, print both at the same size or view both at 16mp resolution. Add NR to the K-3 file if ISO is greater than ISO 1600. Noise will balance out.
There are several advantages of the K-3 over the K-5 - higher resolution with any lens
- AF tracking controls
- 27 AF points
- three f/2.8-sensitive focal points
- -3EV AF and metering
- dual card slots
- reliable bounce flash
- superior rear panel LCD
The only advantage of the K-5 over the K-3 is ISO 80, which provides an extra 0.4 stop of dynamic range.
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Forum: Pentax DSLR Discussion
12-14-2015, 08:45 PM
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Many people use inappropriate settings for Custom Menu items 16,17 and 18: 1st-Frame Action in AF-C, Action in AF-C Continuous, and Hold AF Status, then blame the camera for poor results.
I've seen lots of instances where people lock AF on the center point, then complain the camera doesn't track. Of course it won't track, tracking is basically sabotaged. Or they let the camera choose the AF point with Auto AF mode and it focusses on the wrong thing. If you're going to use Auto AF, you had better make damn sure the camera has successfully read your mind and focussed on your intended subject. I only use Expanded Area AF 9 or 25-point for tracking, depending on how hard it is to keep the subject in the center of the frame.
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Forum: Pentax DSLR Discussion
12-14-2015, 07:22 PM
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K-5 auto-focus sucks in low light, coloured light, when shooting with fast lenses, and in AF-C mode. A K-3, K-3 II and no doubt K-1 will murder a K-5 in all the preceding conditions.
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