Jon Culver
After getting the Pana Leica 100-400 I had the opportunity to try it out on the seals and birds at Point Lobos resereve near Monterrey, CA and then on the beach birds near Pensacola, FL. and dragon flies on a hike near Prescott, AZ. I was very pleased with the results, better than I expected, very sharp especially at 400-500 mm equivalent and even at 600-800 mm equivalent the results were still very good. I also found the lens exceedingly useful for shooting sharp pictures of insects up to one half life size at 4.3 feet away allowing me to get many many more dragon fly and bee shots than I ever could have with a much shorter macro or medium tele focal length. I was also pleased that the Pana Leica matched quite well with my Olympus EM-1 although it was a bit irritating to have to remember to turn off the in body stabilization on the EM-1. Overall the Pana Leica lens stabilization worked quite well--I found that shooting sharp shots as slow as 100th of a second was possible if the subject remained still. However, I found it best to shoot birds at least 1000 even better at 2000 of a second and even faster to insure that I froze the action to cover sudden movements like hops, sudden turns and flapping of wings while shooting at 9 frames a second. But to shoot at those speeds I needed to ramp up the ISO speed more than I liked to (up to 3200) creating more digital noise unless it was a very bright day. This lens is very well suited for bright light conditions but struggles in early morning and lower light settings if capturing fast action is the need of the moment. I really like this lens it is extremely compact and light weight, quality is excellent to quite good across the entire zoom range but the reasons I did not give it a 5 rating are as follows: *the zoom mechanism from 100-400 and back is stiff making focal length changes while shooting a moving subject an awkward task! *vignetting or lens shading in the corners is very noticeable at 200-350 mm equiv. shooting at white sand beaches. *Success rate nailing focus on flying birds using Continuous Auto Focus is very low with the EM-1, hopefully more practice shooting birds in flight and the future purchase of the new EM-1 MkII will give the needed fix so I can get higher percentage of in focus hits. *Finally, $1799 pluse $150 California sales tax is too much for this lens--E-Bays current price of $1599 is about right.