Astronomik L-3 UV-IR Block M67 (SKU: 10247211 / 8h00va)

Astronomik L-3 UV-IR Block M67 (Astronomik, SKU: 10247211) is a luminance filter that blocks ultraviolet and infrared light. The L-3 version has the narrowest transmission window in the L-1/L-2/L-3 family and helps reduce bluish star halos caused by chromatic aberration in the optics. The M67 version screws into the front filter thread of a compatible lens.

Key features

• luminance-channel imaging with UV and IR cut-off
• recommended application: refractors and camera lenses with imperfect chromatic correction
• coatings: Astronomik MFR, reducing unwanted reflections
• can be used with Deep-Sky RGB filters for LRGB imaging
• threaded cell for lenses with an M67 filter mount
• optically polished glass and durable coatings resistant to scratches and humidity

Included items

• one Astronomik filter in the specified version, SKU: 10247211
• protective storage box

Technical specifications

• manufacturer: Astronomik
• manufacturer SKU: 10247211
• filter type: luminance, UV-IR Block
• version: L-3
• transmission window: the narrowest in the L-1/L-2/L-3 family
• blocking: UV and IR
• coatings: Astronomik MFR
• mounting thread: M67
• installation: in the filter thread in front of the lens
• glass thickness: 1 mm
• parfocality: with Astronomik filters with 1 mm glass thickness
• country of manufacture: Germany

Matching the L-3 version to the optical correction enables luminance imaging without recording unwanted UV and IR light.