Jay, can you tell me how close these small birds were? I've found my 100-500 great for really close stuff like out to 10 mts but after that i might as well just use my phone.
It's frustrating the crap out of me.
This Brown Quail was 2-3 mts away and looks good but i took quite a few other shots of Spoonbills, Herons etc that were out form 10-20 mts and they're as soft as
forum: Canon EOS Digital Cameras
Those shots of the small birds were pretty close, within 15 feet. Most of them needed no cropping at all, other then getting some distractions out of the frame. The two shots of the cormorants were farther away, around 30 feet.
However, here are a couple shots that were quite a bit farther, just with the RF 1.4x converter. This heron was a decent distance off, and at 700mm still needed some good cropping, probably closer to 60 feet away.
Here's the original;
And here's the crop;IMAGE LINK: https://flic.kr/p/2kn6Eoi R5__3927-Edit by Jay Cline, on Flickr
I have ones that are farther as well, without any issue at distance. Some of the shots of the jets at the local Air Force base are heavily cropped at 700mm as well.
If there's not something wrong with the lens/settings then maybe it's heat distortion from the distance? I don't know the conditions so it's hard for me to say but being in AZ I'm pretty familiar with it!