Being a new member I'm not sure if it is appropriate, but I have a question about Canon equipment in relation to photographing airplanes (and occasionally a bird).
This year, after many years, I started taking photos of aircraft again. I now have a Canon 80D with the Canon EF 15-85 mm IS USM and the Canon EF-S 55-250 IS STM
For airplanes I use the 55-250mm quite a lot. The 55-250 STM certainly is a fine lens, in particular for its low price. But despite the tests on some review sites compared the image quality as 'almost L-series levels', I can see the difference with photos taken with e.g. the EF 70-200 IS USM or the EF 70-300 L IS USM. Now I want a better image quality.
Recently Canon announced a new EF 70-300 IS II USM
(which isn't an "L"-lens). That is supposed to have a fast AF due to nano-USM.
But no test of the image quality of that lens are available yet.
I think however that I cannot expect the image quality of this EF 70-300 IS II USM to be near that of the EF 70-300 L IS USM or the 70-200 IS USM. I just think Canon is too pleased with the sales of those more expensive L-series lenses.
So I guess that even when compared to the newest EF 70-300 non-L, the image quality of the EF 70-300 L IS USM
will be the best.
The thing I am not sure about, however, is the AF-speed of the EF 70-300 L IS USM
I have seen a short video on Youtube of the EF 70-300 L IS USM focus going from infinity to closest. And when I compare that with a video there also is of the EF 100-400 II IS USM, this seems slow.
I want a very good image quality, and therefore am very interested in buying the EF 70-300 L IS USM
But I just do not want to spend € 1400 to € 1500 and then find out it focusses too slow to reliably focus on fast moving aircraft ........
I have looked on this forum (and other forums too), but I cannot find anything about the auto-focus speed for fast subjects of the Canon EF 70-300 L IS USM
Are there members that have experience with the auto-focus speed of the Canon EF 70-300 L IS USM
on fast moving (military) aircraft?
I would be keen to hear the experiences with the auto-focus speed of the Canon EF 70-300 L IS USM
'in the field'.
I learned that the AF of the EF 100-400 II IS USM is very fast. And also that all of Canon's prime lenses also have very fast AF (ring-USM).
But these are no option for me.
Thanks in advance for any reply!