Thanks for all the info guys, don't know if I have done the right thing but I have just bought a Sigma 50-500 for £435.

Thanks
Chris

Hi Mike
Thanks for such a quick reply. I have a Vivitar MC tele converter, 2X PK-A/R-PK and I use it with a Sigme 70-300mm 1:4-5.6. I have a UV filter on the Sigma, Do I need different settings on the camera that I would have to set manually or should it all work in auto like I have been trying/hoping.
Thanks
Chris

Hi All
Fairly new to distance photography so I would just like to know if anyone has any idea whether a Samyang 500mm Mirror ED Telephoto Lens f/6.3 would be any good on a K20D. Or can someone suggest another good lense that I could purchase. I am going to Canada in Aug/Sept and I want to try and take good wildlife pictures. Or has anyone got a good long lense for sale, I have 300mm lense and a X2 converter but I don't seem to be able to get a good picture from the combination.
Thanks in advance
Chris

That sounds like it could be my problem because that is exactly what I do, I will try it to find out.
Big thanks to you both
Chris

Hi All
I have a K20D that takes very good picture and you can view them when you take them, but a little later(few weeks)when you try and view them it comes up with Camera cannot display this image. I am using a 4GB Sandisk Ultra card in the camera. When the card is in the computer it shows all of the images with no problems. Just wondered if any one out there can point me in the right direction as to whether it might be a camera fault or something else. This has happened with more than one card.
Many thanks in advance
Chris

I have sent a message through your website

I might be interested in the Sigma st500 super at the right price as long as it fits a K20D

Hi Lynton
I am unable to send a PM as yet but I would be interested in the flash if Spacus is not interested.
Chris

Due to the comments I have found it in the book, now I know what it is for and why it is there I have decided to leave it turned on.
Thanks for the replies and you help.
Chris

Hi everybody.
I am new to Pentax camera's and I have just bought a second hand K20D to start with, I am not sure if I have a setting wrong or there is something wrong with the Camera. My problem is that when I view pictures on the camera through the LCD screen in the black area's I get yellow flashing lights and in the white area's I get red flashing lights. There is no problem when the pictures are shown on the computer so could it be a screen problem or something as simple as a setting problem.
Thanks in advance
Chris