Ok it works perfectly now. The kr really is better than the 450d for infrared. Thanks for the advice!

Ok thanks everyone! I'll try out those tips.

because setting a cwb like this means the picture has that surreal look rather than the ugly red tinted look. You can do this on the canon 450d so i thought u could do it on the k-r.

Hi everyone!
I've got an issue with my pentax k-r. Whenever i take a picture of some grass with my hoya r72 on the lens to use as a custom white balance, the camera says the operation could not be completed correctly. Why is this happening. Thanks!

Hi Everyone!
I've got quite a complicated issue which i was hoping you could give advice on. In february my k-r sustained some sort of impact (i don't know how but it did) and i opened the camera bag to find the kit lens had broken off the camera. A few days later, the shutter starting going off whenever i pressed any of the camera buttons (including removing the sd card, somewhat humorously) and the viewfinder went fuzzy. I sent the camera and lens to Jessops, who quoted £240 just to fix the body, saying the mirror was broken. This was obviously extortionate so I sent the camera to Asahi photo, who also said the mirror was the problem. They fixed the lens fine (repairing the mount) and overhauled the mirror/viewfinder on the body. However, this did not amend the problem and after sending the camera body back 5 days ago, the technician at asahi photo still doesn't know exactly what the issue is, saying that it's probably an electrical fault. So sorry for this long post but does anyone know what the fault could be? Or whether I would be able to claim a new camera on warranty? I need the camera back by thursday next week so any advice would be great! Thank you so much.

Ok thanks for the advice. Might make one trip to central london to try all these.

Hi everyone!
I was wondering whether there were any places in london where you can try pentax or pentax mount lenses bacause I'm looking to try out lenses such as the Sigma 10-20mm f4-5.6 and Tamron 17-50mm f2.8. The only high street store seems to be Jessops, which doesn't have such a great selection, no pentax mount lenses. Any advice would be greatly appreciated. Thanks a lot!
SoWhat

Looked at your link CMW and let's just say I want be buying from them any time soon, thanks for the tip.

Ok thanks everyone! But both lenses were in the pentax lens section, so that can't be the difference.

Hi everyone!
I saw both these lenses on SLR Hut:
http://slrhut.co.uk/product/ID263C15/201109-_Sigma-10_20mm-F_4_5_6-EX-DC-J-Autof...
http://slrhut.co.uk/product/ID80C15/201609-_Sigma-Zoom-Super-Wide-Angle-10_20mm-... they have almost exactly the same name (Sigma 10-20mm f4-5.6...) but different pictures and one is slightly more expensive than the other. What would be the difference between these lenses? Thanks!