Camera filters for various camera mount in standard sizes and unmounted flat True Didymium™ glass filters. If you need a size not listed, don't hesitate to contact the factory for pricing and availability. Also available on this page are unedged flat polished Blue Didymium filters in 75 mm and 80 mm diameters. Need an unmounted lens for a special application? We have unmounted (no ring) True Didymium™ glass filters in 50, 75, and 80 mm available. Just use some double-sided tape or a couple of drops of soft removable adhesive to hold it in place. **We use various suppliers for the base UV ring; any name brand shown on the selected ring is not a guarantee that brand will be on the ring you receive. We cut all filters to fit under the lock ring of the filter mount.