The 77mm #25 Light Red Filter from Heliopan is designed to build strong contrast in black and white photography. The filter will make skies look more dramatic and give a tonal difference between foliage and flowers. Infrared images can also be enhanced by the filter, giving a moonlight effect. The colors blue and green are completely absorbed, which will make them darker and increasingly show more contrast. This filter will also cut and remove haze from a black and white image. Exposures should be increased by 3 stops, because of the 8x filter factor.

The ring is made from brass, which will prevent it from getting stuck on the front thread of a lens because of the pliable nature of the metal. The brass ring also has front threads, so filter stacking is possible. Schott glass is a high grade of glass that is used for all Heliopan filters.

Increases Contrast on B&W Film    8x Filter Factor, +3 Stops    77mm Front Filter Threads    Schott Glass Construction    Brass Filter Ring

Increases contrast in black and white film and darkens blue and green tones

Suitable for infrared photography and cuts through haze

Constructed from Schott glass

Brass filter ring prevents filter getting stuck on the front thread of the lens

Dual threading with 77mm front filter threads allows filter stacking

Related Questions and Answers

Q: 1. What are the meaning of the numbers from 1 to 12 on the filter? Can I use it to adjust an exact ND stop like ND8 or ND16?

A: The 1-12 scale is a half-stop scale that allows you to more precisely set the filter to 0.3 (1-stop) through 1.8 (6 stop) increments, as well as halfway in between any of those stops. It is not exactly related to ND8 or ND16 stops as those would be 0.9 (3-stops) and 1.2 (4-stops), though you could use this 1-12 scale to set those at numbers 6 and 8.

Q: 2. Will this work with Leica Q3?

A: Yes, the Heliopan 49mm Variable Gray ND Filter is compatible with the Leica Q3 camera.

Q: 3. sirve para un lente de 85 mm?

A: distancia focal o tamao de hilo?

Q: 4. Can you use this filter on a sony 70-200 2.8 and still use lens hood?

A: The Heliopan 77mm Variable Gray ND Filter is compatible with the Sony FE 70-200mm f/2.8 GM OSS II Lens with the hood attached.

Q: 5. does this affect colors in any way? does it desaturate colors as those cheaper ND filters?

A: No, this filter does not affect coloration of the image.

Q: 6. Can this filter be safely used as a solar filter to film the upcoming solar eclipse?

A: What if one uses live view?

Q: 7. Will this filter also cut out IR?

A: This filter does not offer IR cut capability.

Q: 8. Mine has developed a haze between the two filters. Is there a way to take it apart and clean it?

A: I have exactly the same issue, haze inside the filter. I live in Thailand and after contacting Heliopan there seems to be no support whatsoever outside USA. It's a hugely expensive filter that basically for me is unusable. I asked for instructions to open it but they gave me none. Many ppl have the same issue with this vnd but there is no solution anywhere if you live outside US. I saved a long time to get this and am hugely disappointed.

Q: 9. Hello, will this ND filter setup work with a Leica R lens? if so, which ones? I have a 50mm f2 Summicron, & a 24mm Elmarit f2.8. I need an ND filter that will work with both of these. Thanks very much!Julian Wayser

A: There are many versions of the Leica 50mm f/2 Summicron-R lens. Early versions (1964-1976 black; 1964-1966 chrome) were a Series VI + 14160 (Series VI - E44 filter adapter) and later II models (1976-2009 black) are Internal thread for screw-in type filters E 55 size with a Built-in, telescopic hood. The 24mm f/2.8 Elmarit-R was a Series 8 and our records show some may have been an E60. 72mm to Series 7 Filter Adapter B&H # LEARS77282mm to Series 8 Filter Adapter B&H # LEARS88255mm NDs http://bhpho.to/1m7oEIA

Q: 10. What's the actual filter weight (not package shipping weight) in grams. Looking for options for drone lens...?

A: Sorry, we do not have the actual weight on record and we cannot weigh it. I would subtract a few ounces to get at the weight you need to know.