An ND filter won't do anything to help you get good stills of whales and definitely won't reduce glare.
All it would do is cut light uniformly, forcing a slower shutter speed and/or higher ISO, neither of which is desirable for what you want to...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.