Last week I gave you the story of the "second life" 400mm F/2.8 MKI.
Today the weather was fine so I went to our Nature Reservation Area "Bourgoyen" near Ghent-Belgium. Subject being the Bird Watching Cabin.
This time I was challenged to test the difference between a 1200mm APS-C (600d) setup (+ 400m + x2III) and a digital crop from a full frame (5dII) with 400mm only.
The APS-C was set at F/8 and the 5dII at F/4, both on ISO400 and with a Manfrotto monopod.
Maybe it's just me but to my surprise the digital crop (100%) from the full frame came out better than the optical sollution with the APS-C