The Sigma 77mm Protector Filter for Lens Protectionis 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 prevent dust, scratches, moisture, and other elements from reaching or damaging your lens. This filter is multi-coated which helps to eliminate internal ghosting and reflections.

Sigma Protector filters are constructed from optical glass with a black rim. Set within an aluminum-alloy filter ring that is durable while remaining lightweight, the glass provides increased clarity as well as color fidelity while the black rim further ensures that reflections do not occur along the filter's edge.

Clear Protection Filter    Prevents Damage to Lens    1x Filter Factor, +0 Stop    No Effect on Image    Black Rimmed, Optical Glass Construction    Multi-Coated    Slim Aluminum-Alloy Filter Ring    77mm Front Filter Threads    Knurled Front Edge    Plastic Case

Clear filter offers general protection for your lens against the elements.

Does not require adjustments to exposure while in use.

Multi-coated to help eliminate internal ghosting and reflections.

Creates no additional coloration or contrast.

Constructed from clear, optical glass with a black rim which further ensures that reflections do not occur along the filter's edge.

Slim, aluminum-alloy filter ring helps to prevent vignetting and is durable while remaining lightweight.

Knurled front edges provide a more textured grip when mounting or removing it from a lens.

77mm front filter threads allow for use with other filters.

Plastic case included for storage and transport.

Related Questions and Answers

Q: 1. how come there is no explanation to what this does??

A: It is a new item so it has not been written yet. Create interesting Bokeh that mimics the classic mirror lenses. The Kase Mirror Filter can add some fun and interesting shaped Bokeh to your portrait and landscape videos and images.

Q: 2. does this fits sigma 50mm 1.4 lens?

A: Yes, this fits very well! I am really happy with mine.

Q: 3. Is this the filter for the front of the lens? If so, it must be larger than the "46mm" shown in the title. What size is it?

A: The following filter is a 46mm that is designed and made for the Sigma 500mm f/4 DG OS HSM Sports Lens's filter holder only.

Q: 4. How thick is the filter ring?

A: The ring itself measured 4mm. That is how much it will be after screwing onto the lens.

Q: 5. how come there is no explanation to what this does?

A: According to the manufacturer, this filter will create interesting bokeh that mimics the use of a mirror lens.

Q: 6. If you place the 82mm filter on the RF 85mm 1.2L, can you still attach the lens hood?

A: The Canon RF 85mm f/1.2 L USM Lens has not been tested with that specific filter but it does work with most with the hood attached. The hood will not work with most polarizing filters.

Q: 7. what is the difference between sigma WR protector clear glass filter 95mm vs Sigma WR Ceramic protector filter 95mm ?

A: The WR Ceramic Protector Filter would use a clear glass ceramic substrate which has added strength and a higher transmittance value over the WR Protector Filter which uses a glass element that is not as strong.

Q: 8. Is the filter frame aluminum or brass?

A: The ring on this filter is aluminum.

Q: 9. Are these filters multi coated?

A: No, the filters in the Tiffen UV Protection & Circular Polarizing Filter Photo Twin Pack (77mm) are not multi-coated.

Q: 10. How thick is the glass on these filters? (Not concerned about the total height of the assembly)

A: Same as other filters.