April 9, 20196 yr Good afternoon all. I am new here and i am looking for more info on the following. I have a sony 7rIII with a Sigma apo tele macro 300mm f/4 and the sony-ea4, since the Sigma is an a-mount lens. I discovered (like with my Pentax gear) that i can perform catch-in-focus/trap focus by setting the lens to MF, hold down the release button on camera and focus until sharp. The camera at that moment will take the shot/release. Where can i read more about this? Did not find it in the manual. looking forward to feedback, enjoy the day, Roger
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