SEL20TC Full-frame E-mount 2.0x Teleconverter Lens

I JUST TRIED IT OUT ON MY NEW 100-400 TELE ZOOM,& WAS PLESENTLY SURPRISED THAT IT IS BETTER THAN EXPECTED.I USED IT AT VARIOUS FOCAL LENGTHS FROM 270mm THROUGH TO 800mm WITH GREAT RESULTS. PAIRS UP FANTASTICALLY WITH THE 100-400mm LENS & MY A7iv BODY

First of all let me start by saying that I am not a professional. I purchase the A7III in December, 2019 and it is my first full frame camera that I planned on using primarily for wildlife photos. I am using the FE 200-600 G OSS Lens which gives me wonderful photos. I don't use a blind or a hide so I decided to try the 2X Teleconverter after I found it was difficult to get as close as I would have liked to at times without scaring what I was trying to photograph. I did find that camera settings may need a little tweaking to adjust for lighting conditions. The photos that I have attached are crops and were shot handheld or while leaning against a tree.