<p>Thank you for all your wonderfully detailed responses! <br>
Two more questions came up, when reading all of them:<br>
1. Never used a Tiffen 812 before. Is it mainly for a studio environment, or useful outside in natural light as well?<br>
2. So if I understand correctly, when I'm using black and white film inside, the filters come off, but outdoors my (light yellow) B&W filter stays on?</p>