Baader UV-IR Cut/L-Filter

• Planoptically polished (1/4 Lambda)
• Coatings are professionally applied here in Germany by the most sophisticated equipment available today, ensuring high consistency for bandpass centering, transmission, and out of band blocking. The anti-reflection coatings are designed to prevent halos and balanced to prevent physical deformation of the optically flat substrates. The ultra-hard ionbeam deposition ensures the coatings will never degrade from use or normal cleaning. Each Baader Planetarium filter is coated individually, permanently sealing the coating edges, in order to guarantee lifetime coating durability and uniformity.
• LPFC = Low Profile Filter Cell (effective height 6mm)

Legend:

• 1¼" = Filterthread M28.5mm
• 2" = Filterthread M48mm
• 31mm, 36mm, 38mm (glass thickness: each 2mm), 50.4mm, 50.8mm (glass thickness: 3mm) = round, unmounted
• 50x50mm, 65x65mm, 101x143mm (glass thickness: each 3mm) = square, unmounted
• nm = Nanometer (bandwidth/FWHM)

Note:
The preferred oriention of the filter is to have the highest reflectivity side facing skyward.