The Heliopan 82mm #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    82mm 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 82mm front filter threads permits combining with other filters.

Related Questions and Answers

Q: 1. will this vignette on a 105mm lens?

A: This hood would not vignette on a 105mm lens.

Q: 2. What does the '630" designation mean for B+W filters?

A: B+W does not describe what 630 means. It is only a model designation.

Q: 3. Would this be wide enough for a 24mm (Leica SL 24-90) in the folded down (smallest) position?

A: It is best to use the hood the lens came with for most light blockage and least vignette, https://bhpho.to/3vlRCz2 . The Heliopan 82mm Screw-in Rubber Lens Hood will produce some vignette.

Q: 4. How long is the lens hood in 82mm (both the long and short version)?

A: Unfortunately this is not an item we have a lot of information on, and it is a Special Order item we don't have in stock to measure ourselves. The box dimensions are 5 inches by 4 inches so I would guess that the hood is slightly less than 5 inches long inside the box. But it does depend on the orientation of the hood in the box, so we cannot be 100% sure.

Q: 5. Can someone who owns this tell me exactly how long it is?

A: Heliopan 82mm Long Metal Lens Hood is 42mm long above the threads.

Q: 6. How is focusing done with this filter?

A: Prefocus with the filter on, then switch your auto focus to manual focus so that your focus doesn't shift as the ND is too dark for your camera to find focus. Then screw on the ND and your image should be in focus

Q: 7. Do you know if this hood will cause vignetting on the Leica 50mm Summilux f/1.4 SL?

A: This Heliopan 82mm Long Metal Lens Hood may cause vignetting on the Leica 50mm Summilux f/1.4 SL.

Q: 8. Can someone who owns this tell me its exact length?

A: The Heliopan 82mm Long Metal Lens Hood is approxemelty 3 inches.

Q: 9. Can I screw in a 82mm filter to the end of this shade not attached to the lens?

A: The Heliopan 82mm Long Metal Lens Hood is not designed to accept a filter on the front threads.

Q: 10. 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.