Wonderful series of take off, ciao Giangiorgio

Grazie mille Giangiorgio! I am happy with this taking off series since I've been getting 'soft' images when I used the MC-14 (1.4x extender) to shoot at 1120mm. This is the first time I tried to closed down the lens to test and it does seem to help as you can see these images are sharp . Apparently, this 100-400mm F5-F6.3 is a good/sharp lens but with the extender that push it to F9 and that somehow make the images soft. As I closed up 2/3 more of the f-stop, it sure seems a lot better (more acceptable). Happy .. bird .. shooting!