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Bit late joining this topic but I also have found the same noise problem with my K7 shooting RAW. ISO 400 or above seems to be worse, ISO 200 longer exposures gives the same problem.
Comment by Jimpy posted on Noise on K7 at 01/04/2010 - 07:30
Thanks all, will see if I can get hold of a Pentax 1.7x, anybody got any ideas?
Comment by Jimpy posted on lens tele extenders at 08/02/2010 - 07:23
New member with a question for you guys. Is there a teleconverter that will work with a Sigma 150-500 mm zoom? I am using A Pentax K7 which I am really pleased with.
Comment by Jimpy posted on lens tele extenders at 07/02/2010 - 20:46

