Hi my friends...
First of all, I would like to thank you for your help (I was able to read your suggestions, but I wasn't able to answer, while I was away...)
@ Simone: I raised ISO in order to get a faster shutter, but I tried only few shots in Av, because I'm not used to it: I preferred the manual settings just for this reason... I promise I will practice in Av, too.
then, regarding prop planes, and "helos"... I noticed that I got the blurry effect on propellers at 1/80: at higher speeds the single elements are still visible... But several times the effect is appreciable.
P.s.: oh, I have finally found an Italian mate on the forum!
@ Peter: I definitely agree with you... A good lens does the trick.
200/300mm were ok most of the time, but better results should be obtained with a good lens.
Unfortunately, my tele lens is not good at its highest focals, because I lose some quality...
When I will have some money, I'll buy a better lens
@ Kevin: you welome, it' just a beautiful shot!
I love pictures where condensation is visible! But indeed you need a focal like the yours to get very good shots!
Now, I will write down my experience:
I used ISO 200 most of the time, with a wide aperture, and shutter set from 1/1000 to 1/2500.
Some shots are good looking... This was the first time I experienced this with my camera, but I am quite satisfied of some shots I took. There haven't been any troubles with solo Aircraft.
as a matter of fact, I experienced some probles with the aerobatics teams, for example a blurry effect on "crossing each other" in the sky... I fixed this with a faster shutter speed.
Then, I have a question:
if I have to take a photo to a flying formation... Do I have to close the aperture, in order to get more focal depth?