Does a Dirty Lens Affect Image Quality? Fungus, Scratches, Haze & More – Kamerastore
Lens Protection Filters: A Cautionary Tale – Springer Photo Graphics
UV Haze Filters
A Guide to Filters for Lenses | B&H eXplora
B+W 37mm Digital E F-Pro 010 MRC UV Haze Filter
Filters for digital Photography - phillipreeve.net
Amazon.com : B + W 37mm UV Protection Filter (010) for Camera Lens – Standard Mount (F-PRO), E Coating, 2 Layers Resistant Coating, Photography Filter, 37 mm, Clear Protector : Camera Lens