Optics and photonics. Optical transfer function. Application - Interchangeable lenses for 35 mm still cameras Ingestion-build-59651 BS EN 13055‑2 specifies the

BS EN 13055‑2 specifies the properties of lightweight aggregates (LWA) and LWA fillers derived thereof obtained by processing natural

so it is highly resistant to impact and water damage

BS EN 61987-24-2  on OLOP and DLOP for valve/actuator is useful for:

it supersedes DD ENV 1631:1996 which is now withdrawn

Optics and photonics. Optical transfer function. Application - Interchangeable lenses for 35 mm still cameras Ingestion-build-59651 BS EN 13055‑2 specifies the1 Scope This part of ISO 9336 specifies a method of testing interchangeable lenses for 35 mm still cameras with a picture format of 24 mm 36 mm in terms of imaging states aimed at making valid optical transfer function (OTF) measurements. Special lenses for macrophotography, i. e. those designed and manufactured exclusively for obtaining a magnified image are not covered by this part of ISO 9336.