The B+W 37mm T-PRO Clear Filter is a simple, clear filter with a 1x filter factor and is designed to provide general protection for your lens. This optically clear filter does not affect overall image quality while helping to keep dust, scratches, moisture, and other elements from damaging your lens. To prevent internal ghosting and reflections while providing over 99.8% light transmission, each glass surface includes multiple layers of anti-reflection coating. This Multi-Resistant Coating (MRC) also offers greater protection to the filter substrate and helps it to stay clean for longer than with uncoated filters. The Nano coating associated with this filter provides an additional eighth layer over the MRC, resulting in an improved beading effect when in contact with water for greater cleaning efficiency.

B+W filters are constructed from Schott glass for increased optical clarity and color fidelity. This filter features a thin, titanium-colored brass filter ring to minimize the potential for vignetting while enhancing durability and preventing jamming.

Clear Protective Filter    Reduces Dust, Scratches, Moisture    1x Filter Factor, No Exposure Change    No Effect on Image    MRC Multi-Resistant Coating    Nano Coating    Schott Glass Construction    Slim, Titanium-Colored Brass Filter Ring    37mm Front Filter Threads    Plastic Case

General protection filter reduces the amount of dust, moisture, and scratches reaching lens elements.

Does not require adjustments to exposure while in use.

Multi-coated to prevent internal ghosting and reflections while providing over 99.8% light transmission.

Nano coating provides an improved beading effect with water for more efficient cleaning.

Creates no additional coloration or contrast.

Constructed from Schott glass for optical clarity.

Slim, titanium-colored brass filter ring helps to prevent vignetting and jamming and provides additional strength.

Plastic case for storage and transport.

Related Questions and Answers

Q: 1. Does this filter fit canon EF lens 50mm 1:1.8 STM?

A: Yes, the Hoya 49mm NXT Plus UV Filter will fit onto the Canon EF 50mm F/1.8 STM.

Q: 2. Can you use the NIKON Nikon HB-32 Lens Hood with this filter?

A: Yes, the NIKON Nikon HB-32 is designed to work with the 18-70mm f/3.5-4.5G ED-IF AF-S DX lens over the filter and does not screw on.

Q: 3. Why does it even need the glass? Should just be the slot cover. More glass = more potential for flare.

A: The drop in filter protects the sensor from dust and condensation and does not cause flare.

Q: 4. Is this just a rebranding of the Olympus PRF-ZD72 (same glass same coating)?

A: The OM SYSTEM PRF-ZD72 Pro Clear Protection Filter (72mm) is the same as the Olympus 72mm PRF-ZD72 PRO ZERO Protection Filter.

Q: 5. Does this work on the Canon C70?

A: This is not for the C70. This clear filter is for the EF to RF adapter,

Q: 6. What is the percentage light transmission for this clear filter?

A: The Canon Drop-In Clear Filter A does not have a specified light percentage transmission. However they do list this as having no filter effect.

Q: 7. Does this come with a case or pouch for the filter? The ND RF/EF adapter does not have anywhere to place the filter when it's out.

A: It does come with a plastic case than it can be stored in, if you want more protection, could always get a mini hard case for these as well.

Q: 8. Will a lens "shade" fit the threads on this 77mm filter? I will be using a Sigma 40mm f1.4 art lens.

A: The hood on the Sigma 40mm f/1.4 DG HSM Art Lens fits via a bayonet connection. It does not use threads. But the hood will work with the Hoya 77mm NXT Plus UV Filter attached.

Q: 9. Why not use a snug fitting $5 rubber lens band over the slot when a filter is not desired instead of using this $130 piece of clear glass?

A: The glass filter would act as a barrier between the sensor and the lens mount to prevent any dust/debris from entering the camera.

Q: 10. Is the clear filter fully multicoated?

A: Unfortunately, the Canon Drop-In Clear Filter A is not listed as being multi coated.