The 49mm W12 Umber Warming Color Conversion Filter by Hoya warms the ambient light entering the lens by 2200° Kelvin, which is a +120 mired shift, by adding a dark amber color to the overall exposure. This filter is excellent when using tungsten-balanced film like CineStill 800T, and you want to create a natural look when shooting outside during the daytime.

Designed for Film Photographers    6 Layers of HMC Multicoating    Excellent for CineStill 800T    Converts Color Temperature by 2200°    Creates a +120 Mired Shift    Equivalent to 85 Filter

The Hoya W10 filter is helpful when:

• You are using tungsten-balanced film and want to capture natural colors during the daytime instead of the heavy blue cast the film will create.
• You are shooting tungsten-balanced film indoors with 5500° Kelvin light sources like flashed or studio strobes.
• W10 is not as strong as the W12, so it will produce a slightly warmer look when used with standard tungsten-balance film.

HOYA Multicoat (HMC) filters are recommended for enhancing the performance of today's multicoated lenses. These popular filters minimize reflection, reduce flare and ghosting, and result in over 97% average light transmission.

Related Questions and Answers

Q: 1. Does this filter fit on a Canon EPS 10-18 lens?

A: You shouldn't have any problems with this combination.

Q: 2. Does this filter fit the Nikon 500mm f/4 insert?

A: It does not. You will need B&H # NICPL405 which is the filter specifically designed for the drop in on that lens. https://bhpho.to/2X7oHNp

Q: 3. I have the Puffer Plus, and wanted to know if I can use the same black bar to attach the Warming Shield to my hot shoe, does it fit over the Puffer, or does it come with it's on attachment bar?

A: Unless they have changed the design it is used with the existing holder. You simply slide the white one off and slide the yellow one on in it's place. Saves a lot of space...

Q: 4. I’ve read this is the USA version of the Hoya Starscape filter, is that true? Or is there a difference with the Starscape from this model?

A: YEs this is the USA version of the filter.

Q: 5. Could this conversion lens be stacked on the Fuji x100vi wide angle conversion lens or would it degrade image quality too much?

A: It would not be recommended to double stack conversion lenses such as the Raynox HD-7049PRO Wide-Angle Conversion Lens 0.7X (49mm) on the Fujifilm X100VI. The Raynox is primarily designed for use on camcorders.

Q: 6. What material is the metal?

A: They are made of aluminum.

Q: 7. Why is this lens more than twice as expensive as "Hoya 67mm HRT Circular Polarizer UV Filter" ? The other one has a UV filter too, while this does not. Is there a difference in quality or something else that I am missing in this lens that makes it so expensive ? Just trying to see which one I should buy for my Nikkor 18-300 mm lens. Thanks.

A: The more expensive filter offers two key features the other does not. Anti-Reflective and Hydrophobic Multicoated

Q: 8. How does the diffuser affect exposure?

A: The camera and flash are going to preflash to make a TTl measurement and then automatically determine the necessary output for a proper exposure. The Canon 600EX flash is a TTL flash so it won't really affect the exposure.

Q: 9. Is this polarizer good for beach photos? Thanks!

A: I used this filter in the snows of Patagonia, the beaches of Argentina, the waters all about the Scotia circle and all about Antartica and surrounding waters and ice. Good job.

Q: 10. Is this a thin filter? What is the thickness of it?

A: Although Hoya does not publish the thickness of the NXT Plus Circular Polarizer, it would not be the thinnest option from Hoya. You may want to look to the Hoya 72mm HD3 Circular Polarizer Filter, BH # HOCPHD372 which is less likely to cause vignetting on wide-angle lenses. https://bhpho.to/3LXhNmp