Great camera. I don't believe you can get anything better out there.

I have only just had the K1 still getting use to all the setting's i do like Pentax Camera's always had one the camera is fitted with lots of different modes focusing a bit slow for fast movement but great for landscape, portrait fitted with GPS which is great for location. The lens 28-105m is a great mid range lens.

It carries with it all the features from the K1.

but adds some imho game changers to Pentax cameras.

The Auto focus is updated and is incredibly fast, decisive and accurate. It has made a huge difference to me how my shooting experience is.

The accelerator chip is not something I've bothered to test. The low light capabilities is amazing as with the K1, however the new dynamic pixel shift (essentially image stacking, but handheld) allows you to perhaps shoot at a higher ISO, but because it stacks the images, you reduce noise in the overall image, allowing you to shoot slightly faster at lowlight and retain more detail. It is not the same as pixelshift which requires a tripod (for obvious reasons).

I love the camera. I'm happy I bought it and I would urge anyone who shoots pentax to consider it. The Auto focus alone made it worth it for me.

I can't compare it to the old K1 as I don't own it.

It carries with it all the features from the K1.but adds some imho game changers to Pentax cameras.The Auto focus is updated and is incredibly fast, decisive and accurate. It has made a huge difference to me how my shooting experience is.The accelerator chip is not something I've bothered to test. The low light capabilities is amazing as with the K1, however the new dynamic pixel shift (essentially image stacking, but handheld) allows you to perhaps shoot at a higher ISO, but because it stacks the images, you reduce noise in the overall image, allowing you to shoot slightly faster at lowlight and retain more detail. It is not the same as pixelshift which requires a tripod (for obvious reasons).I love the camera. I'm happy I bought it and I would urge anyone who shoots pentax to consider it. The Auto focus alone made it worth it for me.I can't compare it to the old K1 as I don't own it.