Hiya,
I have just received a 18mm Distagon with 70-86mm adaptor ring. However I am reluclant to invest a big 86mm polariser as it costs around £100 with the Heliopan slim version. I heard that ultra-wide angle lens is prone to problems with the use of polariser. First it must has a very large diameter and be very slim to avoid mechanical vignetting at small apertures. Then the blue sky may not be polarised evenly. Does anyone has experience with the use of 18mm with polariser?
I have just received a 18mm Distagon with 70-86mm adaptor ring. However I am reluclant to invest a big 86mm polariser as it costs around £100 with the Heliopan slim version. I heard that ultra-wide angle lens is prone to problems with the use of polariser. First it must has a very large diameter and be very slim to avoid mechanical vignetting at small apertures. Then the blue sky may not be polarised evenly. Does anyone has experience with the use of 18mm with polariser?