I spent last Sunday shooting photos at the USMC Miramar Airshow, which is primarily the US Navy Blue Angels and other jets and some helos. Typically when I shoot airplanes I use S-AF, small focus point, Single Shot, Spot Metering, Low or 200 ISO and usually get great results. I have no problem timing my shots and when needed get 3-4 per second. But for Sunday I decided I’d try some 21st century stuff that so many seem to brag about. C-AF with a group of nine focus targets, Sequential Low and High, Center Weighted Metering. And best of all the new Panasonic Leica 100-400mm lens. All week long the weather had been great, and then the weekend started some Santa Anna winds, strong hot winds the blow off the desert towards the ocean, high temperatures for here were in 90s – and this caused issues not only on the ground but for about 2,000 feet up as well. Just adding to the challenges. Oh - C-AF with sequential shooting and the EVF lag, what a challenge. Jets traveling 550mph, I’m shooting ten frames per second, and the EFV lag would almost cost me the loss of the jet in the viewfinder many times (Keeping a fast jet in the viewfinder is already a challenge at 400m without any distraction) . But that lag on few occasions showed promising images, like excellent captures of two planes crossing. I’ll tell you, if someone can learn how to use this set up effectively when shooting high speed jets, you should be able to shoot almost anything!!!! I took about twice as many shots as I usually would, I guess not surprising as I was sequential shooting. Through the day there nine plane crossings where it is great to get one plane overlaying the other as they cross paths from opposite directions. Something with S-AF I typically would have captured 7 of those, but with Sequential High, I got two. And now I understand why many say to take 3-5 shots to find the best one in focus! That is because C-AF is slow compared to S-AF and it may take tenths of a second to catch up. And oh how disappointed I was when I started to cull my shots. I looked at nothing but focus and discarded nearly 30% what I had taken. Another 15% bit the dust because they were virtual duplicates of previous frames. And another 5% because I only had part of plane in the frame. So almost ½ my shots were a waste!!!! I’m going back to my old traditional way – I might toss 10-20% but the rest make me pick between them!!!! However – I do have about 10% as keepers. I was really amazed at the Panasonic Leica 100-400mm lens!