I am currently using an A7IV with GM 70-200 to shoot birds. I’m a week away from purchasing the GM 200-600 but for now that’s my setup. Pretty straightforward issue - no matter what shutter speed, aperture, focus mode, focus area or any other setting I use (I keep ISO on auto and capped at like 2000-2500), the pictures look great on the camera’s monitor, even when I zoom in to check out sharpness and details. But as soon as I go to share to my iPhone via Imaging Edge, or the big culprit - cropping to bring the bird more into view and prominence in the shot - I wind up with a blurry, noisy bird. Pretty much every time. I recently moved from the a6100 to A7IV and I’ve had this issue with both camera bodies, so barring user error, I’m guessing that I am simply not using enough lens to shoot birds. No one that I know shoots birds with less than 300mm. I’m guessing that a 200-600 will help me crop a lot less and result in clearer images post processing but I’d like to be sure before making the investment. Thank you in advance for any input that you can provide.