The air filter washing machineis 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    67mm 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 67mm front filter threads permits combining with other filters.

Related Questions and Answers

Q: 1. Anyone have any idea if Freewell solved the problem with the drone giving a Wide Angle lens warning?

A: When using the Freewell Circular Polarizer Filter for DJI Air 3 there may still be a wide angle lens notification that pops up.

Q: 2. Are these filters stackable ? let's say i want to reduce light pollution but i want light streaks or i want ND & CPL same time

A: The Neewer ND & Effect Filter Kit for DJI Air 3 (10-Pack) are not available for stacking.

Q: 3. does this have dual WAN ?

A: Yes, the Ubiquiti Networks UniFi Dream Machine Pro does have dual WAN ports.

Q: 4. anyone used this and have any thoughts? wondering if this filter impacts the color temp in any way. thanks!

A: The NiSi Enhanced Polarizer Filter for DJI Air 2S will increases Color & Tone Saturation, while reducing Nonmetallic Reflections & Glare.

Q: 5. Korg KR mini Rhythm Machine .Can you save your own rhythms & beats to a dedicated preset? If yea, how many?Thanks.

A: The KRmini is able to save patterns to 6 user presets.

Q: 6. How long are the coils good for?

A: The manufacture says the coil in the Vosentech MicroFogger 5 Pro Portable Smoke Machine Ultimate Kit can last a very long time. There is not a specific time frame but if used correctly it can last years. You should never let it run out of liquid and still run it. And do not use it upside down.

Q: 7. Is this machine suitable for a spa snow room?

A: It is possible for the Antari S-200X Silent Snow Machine to work for your specific application.

Q: 8. Can we use the water base liquid from Antari for this model.

A: Yes, you may use the Antari HXL-5 Water-Based Haze Liquid for Haze Machines (1.3 Gallons) for this machine. https://bhpho.to/2GoOF8z

Q: 9. Will this also work on an Air 2S?

A: No, the Freewell Anamorphic Adapter Lens with ND64 Filter for DJI Mavic Air 2 is not compatible with the Air 2S. The Air 2S uses a different camera that is not compatible with the same filters and accessories.

Q: 10. Will the all-day filter kit for the DJI Air 3 work with the Air 3S?

A: The Freewell All-Day Filter Kit for DJI Air 3 (8-Pack) is not compatible with the DJI Air 3S Drone as the camera design is different from the Air 3.