Hi Michael I have used the following on a DS1 and a Z1p
Sigma 12-24mm No quality problems on my sample and superb on film where it is wider than an ordinary fisheye. On digital it is very useful for using indoors in photographing groups at parties, functions etc. Pentax 17-28mm fisheye zoom. Bought it cheap and delighted with the results on film and on digital. Very tempted to buy the new 10-17mm to get the same effect on digital Peleng 8mm Stunning depth of field when stopped down. My wife recently asked me to photograph some flowers in a vase. I put the vase on the patio and stopped the lense down to f16. It was about an inch above the highest flower. Not only were the flowers all incredibly sharp so was the grass on the lawn six feet away. The full circular mode on film is also good fun, peovided you can keep the tripod, or your hands and in my case stomach out of the picture! Come on Pentax, what about a 9mm rectilinear prime Have fun Peter
