RF800mm F11 IS STM Images do not seem sharp...ringing around image

[dcomora]

I am new to Canon products and recently purchased an R5 with the the RF 800 fixed f11 lens.  I have been shooting birds over the past few months.   I have been comparing my shots to those I see posted on line and it seems I am not able to get the sharp focus that I see others getting.  I am using the animal eye focus setting, I am shooting at  shutter speeds of  between 1000 and 2000, my ISO is usually never above 2000.   I have the image stabilization engaged and I most recently used a tripod.   When I zoom into my images, I see a little "ringing" around the outside of the birds and birds eyes.   Someone said I should use Topaz AI sharpen to get sharper images, but I am thinking that should not be necessary.  Is it possible that the lens is out of calibration or am I still doing something wrong?  I also have an R 25 - 105 lens and photos are super sharp. Any advice would be appreciated. 

[ebiggs1]

Number one rule for any sports photographer is to know the sport. I don't care how many thousands of bucks you spent on camera gear if you don't know what you are shooting, it will be difficult to be successful..

You know I really never even gave on-line a thought but you are right. On-line will make a big difference in newspaper photographs.