Post #4412178

@p357@mastodon.com.pl I've just had a proper look. I was out walking around taking photos with my 500cm which, by a bizarre coincidence, has a *very* similar light leak! I've been testing my hypothesis that I have an issue with the mirror bumper/ light seal that seals around the mirror in the up position. I'm testing by taking photos in bright sun with the viewfinder closed. You could do a similar test, cover the viewfinder.