It does appear that people are happier with the "AT-X Pro" but I haven't figured out what specifications differences there are between PRO and a non-PRO Tokina AT-X. I've seen the SD designation on both the PRO and the Non-Pro.
In any event, a lot of people don't seem to get the difference between chromatic aberration of the lens and "purple fringing" which most people agree is caused my the microlenses on the sensor. Thus, I get kind of tired of hearing that this lens causes this or that, without also knowing what sensor you are putting the lens in front of. I also think that some people use a lens in improper conditions. An f2.8 zoom in this range is probably meant for low-light conditions or when you are trying to boost your shutter speed to freeze action. If you are shooting indoors with it, I doubt you get purple fringing. If you are shooting on a cloudy day, I doubt you get purple fringing. If you aim it at bare tree branches on a sunny cloudless day at f2.8 (or there abouts) then I'll bet you get some purple fringing. Mike Johnston calls this "stressing a lens" http://theonlinephotographer.typepad.com/the_online_photographer/how-to-stress-a-camera-le.html But it still isn't really (probably) being caused by the lens, but by the bleeding of information at the sensor level. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
