The Hoya 77mm HD3 UV Filter is a general use, clear filter designed to absorb ultraviolet light and reduce the bluish cast of daylight. Aside from the reduction of unwanted blue casts, no additional coloration or contrast is created, and adjustments to exposure are not required while using this filter. To prevent internal ghosting and reflections while providing over 99.7% light transmission, 16 layers of anti-reflection nano coatings are applied to each side. This total of 32 coatings offers a high degree of protection to the filter substrate and helps it to stay clean for longer than uncoated filters. The nano coating formula associated with HD3 UV filters results in an improved beading effect when in contact with water for greater cleaning efficiency and is also effective with regard to oil and stains.

Constructed from chemically-hardened optical glass, the Hoya 77mm HD3 UV Filter offers enhanced resistance to scratches while providing clarity and color fidelity. It also features a thin, lightweight, aluminum-alloy filter ring to minimize the potential for vignetting.

This UV filter is also useful as a general protective filter to leave on lenses at all times. Such filters help to reduce dust and moisture from reaching your front lens element and provide additional protection in case of drops or situations where scratching could occur.

Clear Protective Filter    Absorbs Ultraviolet Light    Reduces Bluish Cast of Daylight    1x Filter Factor, No Exposure Change    32-Layer Nano Multicoating    Stain and Scratch Resistant    Water and Oil Repellant    77mm Front Filter Threads    Thin, Aluminum-Alloy Filter Ring    Plastic Case

Absorbs UV light and reduces bluish cast of daylight.

Does not require adjustments to exposure while in use.

16-layer nano multicoated on each side for a total of 32 layers to prevent internal ghosting and reflections while providing over 99.7% light transmission.

Nano multicoatings provide an improved beading effect with water for more efficient cleaning that is also effective with regard to oil and stains.

Creates no additional coloration or contrast.

General protection filter reduces dust, moisture, and scratches from reaching lens elements.

Thin, lightweight aluminum-alloy filter ring helps to prevent vignetting.

Plastic case for storage and transport.

Related Questions and Answers

Q: 1. Has anyone used one of these on a Sony A7s series camera? Both versions of the A7s come with a Low Pass filter, which I believe cuts down much of what this filter is intended to do, so is it irrelevant?

A: I haven't used it on a Sony and don't know their specs, but generally Low Pass filters don't cut UV, and don't cut all Infra Red. You can test by taking a photo of the IR cell on a TV remote while pressing one of its buttons, if the photo shows a light in the cell, IR is getting through. I normally use this lens for work where extreme sharpness or clarity is critical or when using tungsten lighting.

Q: 2. If I purchase the Polarizer Filter do I need the UV Filter also?

A: Charles;A polarizer is only good for certain times (there is no use at night for a polarizing filter or indoors), while a UV can be kept on day or night, indoors or out. Not only does it serve as a haze reducer, it is also a good protector for the front lens element.

Q: 3. Does this particular filter downgrade image sharpness in any way vs. not using a filter at all?

A: Technically, any glass layer in a lens system scatters light and decreases sharpness. However, the reality is good filters will not affect sharpness to any degree you can see. Frankly, other factors such as camera shake, focus, subject movement, aperture, lighting and contrast have far greater influence on image sharpness than a quality filter such as this one.

Q: 4. What is the glass thickness?

A: Unfortunately, this specification is not provided by Hoya. Please contact the manufacturer directly.

Q: 5. Can this filter be used with 300mm f/2.8l usm11 lens?

A: To use this filter with the Canon EF 300mm f/2.8L USM II, you would need the Canon - Drop-In Filter Holder for 52mm Screw-In Filters, BH # CAFHS52 https://bhpho.to/32xuTCE

Q: 6. Does the filter have a thread on both ends? One end male, the other end female?I need to attach the filter to the lens, then screw an ND filter in front of it. Can that be done?

A: Yes, this filter has threading on the front and back so it can be stacked with other filters and allow for lens caps to properly connect with it.

Q: 7. Where are these made?

A: Hi, Japan is the country of origin for these filters.

Q: 8. Has anyone combined a Hoya 77mm uv and ir cut filter with a circular polarizer on a 24-105 canon l series is lens using a 5D Mark III, if you have what were the results? Thank you very much before I buy the pair of filters.

A: We are not aware of any issues that combo would create.

Q: 9. Is the front edge of this filter threaded for stacking another filter in front of this one, like a polarizer?

A: Yes. I just screwed one of my other filters to the front of it to verify.

Q: 10. How thin is this Hoya HD3 49mm UV filter?

A: This filter has a frame thickness of 5mm.