

The 100-400 even holds up pretty well with the R7 and 1.4 extender. Some diffraction loss, but otherwise decent and sooooo light.It's always exciting for us to see the first Cuckoo of the year - they are very elusive and they are easily heard but not seen. Ours was yesterday. I am posting the not at all exciting images of a very far away bird to show that the R7 + RF 100-400mm used by wife (the first shot) gives results hardly distinguishable from that of my much more expensive and heavier R5ii + RF 100-500mm (both very heavily cropped and not reduced in size). At that distance and image size, you are looking at pixel-peeping resolution.
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These are very difficult to approach...It's always exciting for us to see the first Cuckoo of the year - they are very elusive and they are easily heard but not seen. Ours was yesterday. I am posting the not at all exciting images of a very far away bird to show that the R7 + RF 100-400mm used by wife (the first shot) gives results hardly distinguishable from that of my much more expensive and heavier R5ii + RF 100-500mm (both very heavily cropped and not reduced in size). At that distance and image size, you are looking at pixel-peeping resolution.
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Excellent photos of the American Bittern! I got some long-distance views of the Pinnated and Least Bitterns last month in Belize, but your photos are better'n what I got...View attachment 229230View attachment 229231View attachment 229232View attachment 229233View attachment 229234
Super happy with the American Bittern. It is so hard to get close to these things.
Thanks for that direct, in-the-field, comparison! It's always great to have good data like this.It's always exciting for us to see the first Cuckoo of the year - they are very elusive and they are easily heard but not seen. Ours was yesterday. I am posting the not at all exciting images of a very far away bird to show that the R7 + RF 100-400mm used by wife (the first shot) gives results hardly distinguishable from that of my much more expensive and heavier R5ii + RF 100-500mm (both very heavily cropped and not reduced in size). At that distance and image size, you are looking at pixel-peeping resolution.
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Do you think we should complain to Canon that our well-used 200-800s haven't broken in two?Least Bittern photographed while birding in Belize, April, 2026.
R5MkII RF200-800mm
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Even though the RF 200-800mm is not an L lens, it is well built and mine has survived a lot of rough handling and inclement weather in the years that I have had it. However, I always retract the lens and tighten the zoom ring when I am not actively photographing.Do you think we should complain to Canon that our well-used 200-800s haven't broken in two?
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Hell, the site kept changing C o c k (without spaces) to penis!? I'll type it without spaces here, penis. And it changes it again!