Hoya HMC 49mm UV-c / Protection Filter - Multi-Coated

Hoya HMC UV filters are most commonly used to protect the front of your lens.   This filter cuts all range of UV rays to give cleaner and sharper pictures with less haze, without affecting color balance.   Constant use for lens protection is recommended.    3-layer (Per Side) HMC multi-coated UV filter using Hoya Clear Glass that is precisely ground and polished for perfect flatness  Over 97% average light transmission  Heat resistant, high-transparency glass  Precision milled low-profile aluminum frame.

A first line of defense against scratches, rain, dirt and dust.   For this reason, most photographers leave it attached to the lens all the time.

All filter glass are not created equal and poor quality glass can affect sharpness, resolution, contrast and color.   Inexpensive filters will use simple window glass, polish it, throw it in a frame and call it a day.
Avoid any filter that does not clearly state what type of glass it is.   More often than not the filter is simple window sheet glass with lots of impurities in the glass that ruin image quality.
Hoya Clear Glass with UV filtration
6-layers of HMC Multi-Coatings (3 Layers Per Side)
97% Transmission rate
Low-profile Aluminum Frame
Filter Properties At A Glance
Filter Factor: Zero
Glass Type: Hoya Clear
Light Transmission: 97%
Number of Multi-Coatings: 6 Layers / 3 per side
Nano-Coating Technology: No
Hardened Top Layer: No
Anti-Static: No
Black Rimmed Glass: No
Frame Construction: Press Fit / Low Profile / Aluminum
Filter Ring Depth: (Less Threads) 4mm
Front Filter Threads: Yes
Accepts Snap In Lens Cap: Yes