[Ivanlam]

各位，想問下其實成像圈的形成原因係唔係關乎個Lens 的diameter事？

如果用大d的diameter的lens係唔係可以避免或減輕成像圈這個問題？

Thanks

[ninekit]

i think you are talking about dark corners, the term 成像圈 is very confusing.

dark corners are usually caused by using incorrect hood or filters which are too thick and block lights entering the lens from the side.

it could also be caused by down-converting the filter thread and use filter of too small diameter, which also block the lights.

ways to avoid, is to use the recommended accessories, and / or stop down the aperture, so as to reduce the dependency of lights entering the lens from extreme edges.

hope it helps.