I have been searching around in CS and the internet regarding slot-in filter systems for UWA lenses that does not cause vignetting (more concerned about those caused by FOV blocked by filter holder) and seems to be getting mixed response. Hence posting this thread to seek advice.
Wish to know which filter system does not cause vignetting on FF camera in the focal length of about 16~20mm range. Due to budget constraints, it would be good if fellow members could point out like which filters and holders of different brands are interchangeable as well.
From what I gathered:
1) Cokin P series- 85mm filters caused slight vignetting at 16-18mm range
2) I assumed Cokin Z series will have no vignetting at all?
3) Lee filter used with wide angle adaptor and their 100mm filters (got mixed response on this)
Do help to suggest other brands such as HiTech an also the interchangeability among those brands and parts (adaptor rings, holders and filters).
Thanks in advance