The Heliopan 37mm #29 Dark Red Filter is a basic contrast filter, primarily for use with black and white film, that completely absorbs blue and green tones, enhances reds, and increases contrast for outdoor photography. It is suitable for use in tri-color separations and for photographing faded documents. There is an approximate 8-12x filter factor with this filter, requiring an increase of 3 to 3.5 stops for normal exposure.

The front and rear surfaces of the filter both feature a single anti-reflection coating. Each coating helps to increase light transmission by reducing reflections, scattered light, and ghosting. Additionally, they offer protection to the filter substrate while helping to keep the glass clean for longer than uncoated glass.

This Heliopan filter is constructed from Schott glass for increased optical clarity and color fidelity. It features a brass filter ring for durability as well as jamming prevention.

#29 Filter for Enhanced B&W Contrast    8-12x Filter Factor, +3-3.5 Stops    37mm Front Filter Threads    Front and Rear Coating    Schott Glass Construction    Brass Filter Ring

Dark red contrast filter for black and white film significantly darkens blue and green tones, cuts through haze, and increases overall contrast.

Suitable for tri-color separations as well as reproduction photography of faded documents.

Single coatings on both the front and rear offer protection to the glass and help to improve light transmission and image quality.

Constructed from Schott glass for optical clarity.

Brass filter ring helps to prevent jamming and provides additional strength.

Dual threading with 37mm front filter threads permits combining with other filters.

Related Questions and Answers

Q: 1. HelloI would like to know if this filter is good enough and it is clear enough without reducing the sharpness of the image at all ?Also is it on the lens 24-70 full frame body going to show any vignetting.Thanks a lott

A: Yes, the Hoya filter is excellent and will not affect the image quality of the lens or camera. Also, it will not vignette.

Q: 2. 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: 3. Does the B+W T-Pro Clear Filter have front threads for a screw in lens hood?

A: The B+W 52mm T-PRO Clear Filter has both front and rear 52mm filter threads for a 52mm lens cap or screw-in lens cap.

Q: 4. how many f-stops do you need to adjust for using this filter? Also, what is the filter factor?

A: The B+W #630/091 Dark Red MRC Basic Filter has a 3 stop filter factor.

Q: 5. Will this filter work on the Leica 50mm Summilux lens with the pull out hood?

A: If you are referring to the Leica Summilux-M 50mm f/1.4 ASPH. Lens (Black) then yes this filter would work.

Q: 6. What is the glass used/origin and is it multicoated?

A: The Urth 77mm UV Lens Filter (Plus+) is made with SCHOTT glass and is multicoated.

Q: 7. In May 2024, does new B+W T-Pro Clear Filter comes in leather black B+W pouches (ones without dust issues.)?

A: Yes, the B+W 62mm T-PRO Clear Filter comes with the leather case inside of a seal carbon box. Due to the manufactures rules and conditions we are not authorized to open a seal box. However I own several of this filters, and if there is any manufacturer dust on the filter, they are very easy to clean using a LensPen cleaner or a microfiber cleaning cloth.

Q: 8. Does the B+W 52mm T-Pro Clear filter hav e front threads for a screw in lens hood?

A: The B+W 52mm T-PRO Clear Filter has both front and rear 52mm filter threads, which would allow you to connect a 52mm lens cap or screw-in lens hood.

Q: 9. Will the lens cap attach to this filter

A: Yes, the Urth 77mm UV Lens Filter offers a double-threaded design that allows filters to be stacked and lens caps to be used.

Q: 10. Will I still be able to use the lens hood on the Sigma 30mm 1.4 dc dn, on my Sony A6400 with this clear filter?

A: Yes, using the B+W 52mm T-PRO Clear Filter on the Sigma 30mm f/1.4 DC DN Contemporary Lens (Sony E) the dedicated hood the lens came with will fit.