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Stock Specification
A longpass (LP) Filter is a coloured glass filter that attenuates shorter wavelengths and transmits (passes) longer wavelengths over the active range of the target spectrum (ultraviolet, visible, or infrared).
All HOYA ® Filters are made using only GENUINE HOYA optical colour filter glass material
MATERIAL: | HOYA ® Filter Glass | SURFACE QUALITY: | Ø12.5mm ≤ 3 fringes | |
DIAMETER TOLERANCE: | +0.0 / -0.2mm | SURFACE QUALITY: | Ø25.0mm ≤ 5 fringes | |
SQUARE TOLERANCE: | ± 0.2mm | SURFACE QUALITY: | Ø50.0mm ≤ 8 fringes | |
THICKNESS TOLERANCE: | ± 0.2mm | PARALLELISM: | ≤ 3 arc minutes | |
SURFACE QUALITY: | 60/40 | EDGES: | fine ground |