The Heliopan 52mm #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    52mm 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 52mm front filter threads permits combining with other filters.

Related Questions and Answers

Q: 1. I got a D500 camera. What size NC filter do I need?

A: That depends on the lens you are using. The lens usually mentions the size on the front ring around the glass.

Q: 2. Does this fit on the front end of Nikon's 200-400mm f/4 lens?

A: Yes. I have this on my 200-400.

Q: 3. How many stops adjustment?

A: The manufacturer does not present this information for the B+W #630/091 Dark Red MRC Basic Filter (67mm) but as a general rule a red filter typically needs about 3 stops of adjustment.

Q: 4. Hi. Is it the right filter for the "AF-S Nikkor 50mm f/1.4G" lens?

A: This filter will work for that lens.

Q: 5. What size protective cap will fit on this model?

A: 52mm, same as the male thread.

Q: 6. 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: 7. Will 52 short hood give the vignetting on 24 mm lens (APC-S)?

A: It is possible to get a vignette on a 24mm lens. It would be best to give it a try as many factors come into play that could affect this combination.

Q: 8. what is the length of the hood?

A: Once installed, assuming your lens has sufficient female threads to accommodate the back of the hood with its male threads, it will protrude about 12mm or 1/2 inch.

Q: 9. Is this IR filter, or any B+W IR filters, the equivalent of the Hoya 77mm R72 infrared filter?

A: Yes, the B+W 695/092 IR Dark Red MRC Basic Filter (77mm) may have similar performance to the Hoya R72 filter. A few other alternatives would be the Haida 77mm NanoPro IR720 Filter, B&H # HAHD459977, or the Kolari Vision Infrared Lens Filter (77mm, 720nm) BH #KO720NM77, or the Urth 77mm Infrared (R72) Lens Filter (Plus+), B&H # URUIRPL77, would also work for your usage needs.

Q: 10. I have a Nikon lense which takes the 52mm size screw in filters. the lense is a 55mm. so I am looking at 52mm filters and step up rings. the question is, are the threads on this ring compatible with the rings on my Nikon? are thread sizes the same brand to brand? is it universal like mini usb charging adaptors for cell phones. since Nikon doesn't make many filters etc for its lenses I keep seeing all these from different brands and am curious if they are compatible. my lense is 18-55mm and I would love to enhance fall colours. thank you.

A: Filter threads are standard. If you have a 55mm lens, you need to get a larger filter size, and use a step up ring from your lens to the filter. If you use a smaller 52mm filter on a 55mm lens, you will have a large round black border around your entire picture because of the vignetting.