http://members.shaw.ca/hargravep/Image10.htm Sigma 50mm EX Macro plus the Pentax Rear Converter-A 2X-S. Comments, critique encouraged.
The f stop reported to the camera is wrong with this combo. Wide open it tells me the 2.8 lens is a 1.4 and of course the combination is really 5.6. The exposure is fine and when set to A the camera adjusts the diaphragm properly. Just the numbers are wrong. Anyone know if this can be fixed? Bit of an annoyance but not a real problem. Powell
