I have had a bit of time to fiddle with the STARTRC wide angle attachment to the Mavic 4 Pro. In many of my images I found the lower right corner to be slightly blurred , or out of focus. Some images had no issues. Obviously this was due to f-Stop and brightness of the image. I returned my first one over this. True to form Amazon did the return, I received another a day later. Gads, while it does not happen all too terribly often, they sent me a used unit. It was open and the plastic case was cracked. The accessories was undamaged inside. Tried it out in a more controlled manner. Ugh, the upper left corner had the issue this time. It looks like they may have two things going on here. Lack of QC testing or a design that does not register the lens optically in the correct position every time. Again with the lack of alternatives, I ordered a third one. It will be here later this week. If it was not for the corner issue, it would be acceptable.
I had similar issues with CPL filters on the
Mavic 3 Pro. Took several brands till I found one that didn't have that problem. Ironically, it was the STARTRC version on that drone.
Normal wide view:
View attachment 185583
With the Wide Angle Lens Attached:
View attachment 185584