Originally posted by ChristianRock Always the skeptic, I had to go and find some pictures of air shows taken with that TZ70. It can't keep focus at those focal lengths. Your ability to produce in focus shots with that 400mm lens is to me phenomenal. And I don't think they are bad at all, there's good detail, good color and a very natural look on them. They don't look too soft to me, they look natural (I don't like the over-sharpened look a lot of people go for nowadays).I also looked at static object pictures taken with the TZ70 at the long end. The superzoom lens, the small aperture and the small sensor, I think, do play a part there, I'm not impressed with what I saw. I bet if you printed those airplanes you would not be unhappy with your results.
There's another airshow in my area coming up in early July (weather permitting), so for that one I'm thinking of using a combination of the TZ70 and the K100D plus Sunagor 400mm to see which one works best.
At the airshow last weekend it was interesting listening to the serious photographers around me with their expensive up-to-date gear, mostly mirrorless. I was hearing a lot of complaints about their autofocus not locking onto the planes against the blue sky, so perhaps it's a common problem. There was much worried muttering about various autofocus modes (apparently no airshow mode in the mirrorless world), and I considered suggesting they try manual focus. But by that time I was already persona non grata because they knew what hopelessly inferior cheap old gear I was using.
Apparently their cameras weren't getting the exposure right either, leaving the planes underexposed against the bright sky. So there was lots of discussion about arcana like EV compensation, which is all way beyond me. To my eyes it was obviously an occasion for a reciprocal of Sunny 16 based on the shutter speed you'd chosen to get prop blur, so that's what I went for.
But hey, what would I know about such things? Me with my crappy old gear. I think it was a situation that argues strongly in favour of the optical viewfinder though. I was looking at the actual airshow magnified in my viewfinder, while they were basically watching it on TV.