The Heliopan Bay 60 #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    Bay 60 Front Filter Mount    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 mounts with Bay 60 front filter mount permits combining with other filters.

Related Questions and Answers

Q: 1. Can another filter be attached to the front of this one? (I.e. so you have two circular 77mm filters on your lens at once.)

A: Yes. I have 2 of those filters and I just checked - they can be stacked.

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. What is the range of filter diameters available goth the Series 7 & 8 filters?

A: I'm not sure I understand the question, can you rephrase?

Q: 4. What additional features are found in the Series 8 filters when compared to those of Series 7?

A: Series 7 or Series 8 simply refers to size only.

Q: 5. Does this work with Canon EF to R lens adapter with drop in filter slot?

A: The Kolari Vision R Dark VND Filter (6-15 Stops) is compatible with the Canon Drop-In Filter Mount Adapter EF-EOS R.

Q: 6. how much weight can this desk support? What is the warranty?

A: This would be able to hold up to 75 pounds.

Q: 7. Does the 29-inch height (at lowest setting) include the casters?

A: Yes. lowest setting is 29 with casters. I love this desk. Easy to crank and much cheaper and reliable than electric models.

Q: 8. About how long does it take to crank from lowest to highest height?

A: I just timed it:It takes 89 cranks (full revolutions) to go from one extreme to the other. It took me 50 seconds to do it going from low position to high (slightly harder that going high to low), and 31 seconds to go from high to low. At a nice, jaunty pace, I'd say expect about 90 seconds. (It's a fantastic desk, by the way.)

Q: 9. All of my filters are for 1.25 mm . My camera is a Canon T3 Rebel . Will this filter fit in my lenses (1.25 mm) or on my camera?

A: The Heliopan 30mm RG 1000 Infrared Filter will fit a lens with a 30mm diameter front

Q: 10. How is the 'protection' capability of this lens, if I'm looking to replace my protection/UV filters with this one? And does it have 8 coatings, or one on each side? I've heard conflicting descriptions.

A: The filter has one coating per side to help with reflections and protection of the glass.