Dan Vincent
Leading Member
The 70-400 G easily beats the 400 f/5.6. Granted, that lens is a very old design, but the 70-400 G at 400 f/5.6 is one killer lens. It shows what potential you can have at those FLs in a zoom that costs the same as the ancient designs of Canon and Nikon and wipe the floor with a Sigma.When I was with Canon, I seen shots of airshows with a 70-200 w/teleconverter or 100-400 that were very good, but when people shot with the long prime lenses then it made the zooms look very poor. The Canon 400mm F5.6 took incredible shots that were tack sharp of the planes. The zooms still looked good but the prime lens easily outshined the zooms.
As I wrote in the Sony/Oly thread, more shots at airshows are ruined due to atmosphere, weather, sun position, etc. than focus or absolute sharpness of the lens.
The 70-400 G would be the lens to beat. It just needs a better body (cough, a7xx) to be paired to in order to truly shine. The IQ on a900 is excellent, but it's no secret that the AF on that camera is merely good, not great.
--
http://www.dvincentphotography.com
http://www.kefkafloyd.com