Hey guys!
Just wanted you to know that i met the seller today to check out the lens and even though it is three years old, you could easily mistake it for a new one. Not a single scratch! The focus is SPOT ON!!! I read a lot of reviews - a LOT. And almost every one stated, that the focus is accurate but slow. As I wrote earlier I do have the DA 40mm Limited which is said to have one of fastest autofocus in the whole Pentax lens lineup. I did not do any scientific tests but what I can say from shooting with the SDM today, is, that at least in my eyes the DA* is just as fast and more accurate than the Limited. On the limited the focus hunts back and forth sometimes and only locks on target after going back and forth. The SDM just locks on without any kind of hesitation.
After shooting with it for almost an hour, I was sure: I did the right thing! This lens is bloody fantastic. It's sharp even wide open and after stopping down to f/4.0 it's RAZOR-sharp! It is sharper then the DA 40mm Limited and I just love the colors. They are warm, contrasty and just beautiful. The weight is there, but I think it really helps me stabilizing the camera at longer focal lengths. I had no strap with me and even after an hour of running around with the K-5 and the DA*, it was not bothering me at all!
Here are some shots from the hour of walking around (I absolutely love the bokeh!):
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I also think this lens is great for candid shots because of the longer focal length and the distance you can keep to your subjects.
The only thing which I noticed after getting home today, is that the SDM sometimes makes very faint high-frequent (twitter-)noises. I read on other forums that this is normal and almost all Pentax SDM lenses do this. I can only hear it indoor if it is very silent so I am really not bothered by it at all actually.
Price paid was 590€ due to the like-new condition and the guy who sold it to me was very nice too.
Got the original packaging, the "sleeve" in which the lens comes, and a UV-filter from Hoya (Hoya Super Pro-1). I have to do a short comparison in the next time - with and without UV-filter. I think I am going to let it on the lens for now, though.
Thanks again for all your input! It really helped me to decide.