Hi all, new to the forum, I did a quick search but didn't see much on pancake lense option.   I'm really liking the portability of the kit lens, but do realize it has its short coming, so looking at some prime options out there.  Curious if anyone has tried any, and if they are worth the upgrade over the kit lens, used mainly for landscape and scenic, with occasional action shots when the opportunity arises.  Specifically lenses I'm interested in  Sony 16mm 2.8 with the wide angle adapter  Ttartisan 14mm 3.5 Sony 20mm 2.8 Ttartisan 27mm 3.5 Any feedback is appreciated 

Any reason you decided to replace the Sony lens with the Sigma one in the first place?

Yeah, B&H got back to me today apologizing and offering a refund. Strangely, I dug out my old A7 and tried the lens on there. No issues. Put the lens back on the A7 IV and now it seems to be working as normal. However, at the price point I’d rather just exchange it for a different one in case it happens again. Really love the lens though.