Quote Originally Posted by FNQGU View Post
Another example of the vignette factor.
Yep, have the same problem when stacking circular filters at 18mm or smaller focal length. Using a Cokin filter system now to avoid that (not that I use them much).

https://www.cokin-filters.com/creative/filters/nd/#

They are a bit pricey, but very good quality compared to a cheaper set I first bought. Have full & graduated filters in 2, 4 & 8 stop which can be stacked. Graduated come in handy for balancing a bright sky against the foreground in landscapes.

Like the streaky sky shot, adds a bit of drama to a landscape, will have to get out & do some one day. That "little Olympus" takes a nice photo from the ones I`ve seen on here!