The portrait is a cracker. What lens did you use ?

Lee will happily sell you the 150 kit which will work with the 15-30

To be honest I have not given the 300 a good run for it's money yet on the K-1, that will be my task this year. The K-1 honours lens corrections for the DA*300 and DA*200 in both FF and crop mode

Not sure about the 50-135. You should check over at Pentax Forums as they have a dedicated compatibility thread. The DA16-50 did not work and I sold that. The 60-250 works very well for me. Some have resorted to a "baffle modification" to remove vignetting completely, but I don't feel the need. it is not drastic for the kind of shooting I have been doing with it. The DA 40mm and DA70mm worked fine too. They are both prone to minor vignetting which can easily be resolved in post if you are not cropping the picture

Interesting you mention DOF. There have been a tonne of threads on other forums about the change in DOF when moving to FF versus crop sensor. Personally I dont notice it. When i want a picture with a certain amount of DOF I just fiddle with the aperture until i get what I want. Maybe I am just unobservant

If it helps you to decide, the DA* 300mm f4 is a full frame design. Works beautifully on the K1. No vignetting.

Nice. The bird and flowers compliment each other. Always nice to see pictures of birds we don't see here.

Sounds like a symbol to show something is locked. What does the manual say ?

A natural light portrait shot today with the FA50mm 1.4 that I bought last year from forum member Colin. Love the tight DOF this lens can offer.

K-1 + FA 50mm 1.4 : 1/500 f1.4 ISO 200

looks perfectly exposed to me. What did the histogram show ?

Purple fringing , especially at the extremes is usually the fault of the lens rather than the camera. Wider apertures show it worse. You should be able to remove that easily in PP

Nice idea, I like the texture that is revealed.

Not really my area of expertise, but just a thought: they seem almost overexposed at the top and I find the lack of any detail in the dark area directly in front a bit distracting. I can see you used natural light to light these. So maybe underexpose a bit and add a reflector next to your shooting position to bring a little bit of detail to the front. This would still give you a graduated lighting effect and so retain the form of the subject.

I see a couple of these were taken with the DA 560, some serious bit of kit. Do you have an assistant to carry it when you "wander" with that on the camera !