There is only one thing I don’t like about my Bower fisheye lens, namely that it doesn’t take filters. It’s not an issue for digital, but it does introduce some limitations for black and white film. At least I can take colour digital and convert to Black and White after the fact (and add filters). Today’s image (created yesterday at the RC Harris Water Treatment plant here in Toronto) has the equivalent of a dark red filter added, to dramatically darken the sky, even though I was shooting directly into the sun.

Nikon D7100, 8mm/3.5 Bower Fisheye lens
Post work done using Adobe Lightroom