A7SIII - My First Impressions In: Cameras Posted September 28, 2020 3 hours ago, Trek of Joy said: Haven't tested it yet, but Clear Image Zoom does a 1.5x crop in 4k and a 2x crop in HD. On the a7III there's no IQ loss. The a7III has enough resolution for 4K in APSC crop though. The big question is how well will it work on the a7s where there isn’t enough and it’s resampling slightly? I have yet to see a good test of this for the viability of S35 glass.