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12-01-2014, 10:22 AM   #1
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Pentax K20D vs Kx

Which camera has the upper hand,K20D or Kx in terms of performance? Which would be better for portrait photography?

12-01-2014, 10:42 AM   #2
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both are somewhat older models. However, in terms of performances, features, controls, etc, the K20D wins hands-down. It is a larger camera, which is one of the only points it loses versus the K-x. It is weather sealed, with more external controls, a larger and brighter viewfinder, a top LCD, more resolution, a faster burst mode. It shows the focus point in the viewfinder, which is important too.

The L-x has a basic video mode, a few functions like in-camera HDR, a slightly faster max shutter speed, and that's about it.

Pentax Cameras | Pentax K20D vs. Pentax K-x vs. Pentax K-50 - Pentax DSLR Comparison -
12-01-2014, 11:43 AM   #3
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I have the K20D and K-r (same sensor as K-x but upgraded AF and jpeg engine, among other things).

I consider the K-r and the K20D a tie for portraits - K20D wins in terms of color reproduction, especially skin tones, but also just colors in general. Also, K20D has a much better viewfinder and tons more controls on the body. K-r wins in the areas of dynamic range (obviously) and AF. The AF on the K-r is just more accurate than on K20D. As bdery pointed out, the K-x (and K-r) is quite smaller and that does make a difference... However, since the K-x, I think, has the same AF system as the K20D, instead of the one in the K-r, I think the K20D actually wins in a direct comparison. So - Unless you really need that extra dynamic range, I would just go with the K20D.
12-01-2014, 12:10 PM   #4
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Another thing in the K20Ds favor is that it can take a battery grip. The extra controls might be useful when shooting in portrait orientation.

12-01-2014, 01:56 PM   #5
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I owned the K20D and K-x simultaneously for a few years. The K20D was my main body, the K-x was backup. I eventually sold the K-x and still have the K20D. The K-x has higher dynamic range and about 2/3 stop better high ISO performance, but regardless, images from the K20D look better and the controls are vastly superior. Here's a test with crops that I did to try and figure out why I preferred K20 colours and detail:

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