Hi all, my GF owns an ageing 5d mkII and she is not happy with the image quality, AF performance, and overall features of the camera. Especially compared to my Pentax K-1. Which FF Canon compares well against K-1? 6D mk 2 or rather 5d mk 3? Please disregard the megapixels, she does need to crop too much, usually.
There is nothing wrong with the 5D mark2, my suggestion is read between the lines, your lady wants the same camera that you have, if you can buy her one, You can both share any extra lenses you may have for the K1 or if she has any canon lenses buy an adapter so she can use them.
Making the transition from Pentax, myself. Keeping my K-1, but added a Canon EOS 5DS R; so far, very happy with it. Great IQ, easily configurable.
Well if you look into DXOMark ratings the K-1 is pretty highly rated, your going to find it more comparable to a 5dIV or R not your previously mentioned cameras. AF performance should be quite good on any cross sensor auto-focus camera even on the 6D2 with the 45 points. The 5d3 is significantly older and really feels like a minor upgrade to the 5d2 so I wouldn't compare it to that. So if you want better ISO performance and better AF yes upgrade the old 5d2. You mention overall features, well yes the newer breed of cameras includes WiFi/Bluetooth/GPS which are things you did not see almost a decade ago. Otherwise you could specify any "features that are lacking". I guess my only concern is the generic phrase image quality, just because the camera is old does not mean it does not produce sharp images or great color rendition, all these cameras can produce that. The newer ones can be pushed further in situations where AF or ISO performance become a concern and the older generation would fall short.
All true, @johnsey; I made my choice on the basis of things I like and dislike rather than ratings. I hate touch-screens, and don't particularly want video capability, GPS or WiFi, whereas enormously high pixel-density is a really big plus. The only thing that the 5ds lacks that the K-1 has that I'd like to have, would be "in-camera image stabilization". Pentax achieves that by moving the sensor around to compensate for movement. I don't much like a joystick, and prefer direct controls rather than having to use the "quicky screen" or top buttons. I figure it's like renting an apartment: you either get nice neighbors, convenient parking, a good view out the window, a swimming pool or tennis courts; you don't get everything. It's a matter of optimizing one's priorities.