I did. But I eventually landed on the 5DsR/100-400 II for tele shots + GFX for 100mm and below. I shoot lower ISOs, and I preferred the resolution, lack of AA filter, and overall IQ of the 5DsR over the 5D4.Are you sure you owned 5D Mk IV? It's especially good in terms of colour noise, including the shadows. At ISO 100 it's virtually non-existent and still pretty good at high ISOs. You need to really push the sensor to its limits in order to get the colour noise.