A big thank you to everybody who gave me advice on using this lens. I can now say for certain that as much as I like the FA 50mm 1.4, I like the K 50mm 1.2 better! I learned a bunch and thanks to youse guys I didn't make very many exposure mistakes. The biggest thing I learned is that as I continue photographing, I need to take more care with my focusing as time goes on. In the beginning most of my shots were dead on, as time wore on, more and more of them were slightly off. I don't know if that's due to eye fatigue, overall fatigue, or if I just get sloppy. In any event, something to pay more attention to. I really really really really really like this lens! Here are a few from the Conservatory at the NY Botanical Gardens this afternoon.
All shot with my DS, the K 50mm 1.2. Since this is a manual lens, I have no aperture data.
Reflecting pool in main atrium 1/180 ISO 200


1/250 ISO 200


Well no worries about sharpness! 1/500 ISO 200


the DOF wide open is paper thin! It requires as much care focusing as macros! 1/250 ISO 200


It handles colors very well 1/125 ISO 400


More colors 1/90 ISO 400


The Garden is getting ready for it's annual orchid show, so they put out some "teasers" 1/180 ISO 200


1/125 ISO 200


Well, thanks again everybody, and thanks for looking, I guess I may keep this stupid old thing after all!

NaCl(to say I'm pleased would be a slight understatement)H2O

[PaulAndAPentax]

These are very nice shots!

[roentarre]

Sorry, SupremeMoFo! Jonas sold all his Pentax equipment and stayed with C.

Nah, Jonas already sold his canon 5D and now using olympus gear.

But he still uses his DS though

Sure he will come back to Pentax soon

[SupremeMoFo]

Sorry, SupremeMoFo! Jonas sold all his Pentax equipment and stayed with C.

Just poking fun that a half-kilo lens is considered a workout I don't even consider 1.5kg worth of 1.4x teleconverter and 70-200 f2.8 a workout, and I'm tiny (167cm/58kg, or 5'7"/128lb)