UV/IR Cut-Off Filter (1.25") by OVL
A good value, quality filter from OVL (Optical Vision Ltd, the official Skywatcher distributor in the UK and Western Europe).
This UV/IR cut-off filter blocks UV and IR rays to maintain the color temperature you want, eliminating false colour fringes around bright stars. Offers a 99.9% light transmission rate for bright and clear images. Suitable for visual observations and for CCD photography.