The through the wall air conditioner filteris a basic contrast filter, primarily for use with black and white film, that strongly darkens skies, reduces blues, and increases overall contrast. It is also suitable for some infrared and false color photography and helps to cut atmospheric haze. There is an approximate 3-4x filter factor with this filter, requiring an increase of 1.5 to 2 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.

#12 Filter for Enhanced B&W Contrast    3-4x Filter Factor, +1.5-2 Stops    Bay 2 Front Filter Mount    Front and Rear Coating    Schott Glass Construction    Brass Filter Ring

Dark medium yellow contrast filter for black and white film strongly darkens skies and blue tones, cuts through haze, and increases overall contrast.

Can be used for infrared and false color photography.

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 2 front filter mount permits combining with other filters.

Related Questions and Answers

Q: 1. Two questions here. I work in a studio setting with 500 W daylight bulbs. Will this stand the high heat generated by the bulbs? Also, with the light be distributed enough to light an entire person, standing, or objects the size of a car if I use two units?

A: Hi Rebecca. I use profoto D1 and B1 strobes versus continuous light. So, I'm not sure the heat rating of this umbrella. If you're shooting with fluorescent or LED lights, I would guess you'll be ok. If you're using anything that generates a lot of heat, I'd check with the manufacturer for what it can handle regarding heat. As far as coverage, I use this all the time for large groups as my fill light and it works great. You get a lot of diffusion for the price.

Q: 2. Does this stand allow you to have the power cable always connected to the iPad?

A: Yes, there is an opening at the bottom to connect a lightning cable.

Q: 3. 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.

Q: 4. are the rack mounts removable ( the brackets on the front ends)?thanksMike

A: No, the front panel is made from a 19 wide piece of metal. The rack ears are not removable.

Q: 5. Does this support the ipad mini?

A: The iPad Mini is not supported. This is only for the iPad Air, iPad Pro 9.7, and iPad.

Q: 6. The description indicates that the plate is white, but the picture looks like it's silver. Is this actually white?

A: It is silver only not white

Q: 7. 230v?

A: No it does not the Furman PL-8C operates at 120v

Q: 8. Is it safe to let this sit on a carpeted floor?

A: As a power conditioner, this unit has the potential to get hot from time to time. We would recommend trying to keep this on a hard surface if possible.

Q: 9. 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: 10. Whats the most durable tiltable mounting bracket to use this on?

A: This is a great umbrella...it's heavy for the lighter weight brackets. I use it with Profoto D1 Strobes, which hold it well. I'd suggest a heavy duty bracket for it. You'll be disappointed if you cut corners on a light duty one