This 3- to 1-stop, 100 x 150mm Red Diamond Hard-Edge Reverse-Graduated ND Filter from Haida is compatible with the Haida 100 or 100-Pro Filter Holder. It can be applied to darken bright skies, specifically during a sunrise or sunset, while allowing for a normal, unaffected exposure in the other regions of the image.

This filter achieves its effect with a 0.9 band of density across its center region that provides a 3-stop reduction in light from entering a lens. This band extends approximately 15mm in both vertical directions. With a soft-edged line of transition, it tapers to a 0.3 density that provides a 1-stop reduction in light at the edge above it. Directly below the 0.9 band of density, it tapers to clear, with a hard-edged line of transition before the clear area.

The placement of a 0.9 band of density that tapers to a density of 0.3 above it with a clear area directly below, allows the Haida 100 x 150mm Red Diamond Hard-Edge Reverse-Graduated Neutral Density 0.9 to 0.3 Filter to match the positioning of the sun when it is at, or immediately above, the horizon. In such instances, the sun can appear closer to the center of an image as opposed to the upper edge, and an increase in brightness is created that is more prominent on both sides of the sun than above it. This pattern of brightness corresponds to the density pattern on the Haida 100 x 150mm Red Diamond Hard-Edge Reverse-Graduated Neutral Density 0.9 to 0.3 Filter. The hard-edged line of transition in this reverse, graduated neutral density filter is useful for hard transitions between the sky and land, while the 3-stop to 1-stop gradation with a soft-edged line of transition is applicable to multiple regions of brightness within the sky.

Haida Red Diamond filters are constructed from shock-resistant optical glass. To prevent internal ghosting and reflections, while further enhancing clarity and color fidelity, each glass surface includes 10 layers of anti-reflective nano coatings. An additional 10 scratch-resistant hydrophobic coatings further protect the filter's substrate and result in an improved beading effect when its surfaces come in contact with water or oil, allowing for more efficient cleaning. Additionally, Haida Red Diamond filters feature rounded edges for easier placement within a compatible filter holder slot.

A fabric filter pouch for storage and transport is included, as well as a light-blocking gasket. This gasket forms a seal that is intended to prevent stray light, which could have unwanted effects on exposure, from coming in between the filter and the lens behind it.

0.9 to 0.3 Optical Density    Multi-Coated Surfaces, Rounded Edges    Scratch-Resistant Hydrophobic Coatings    Shock-Resistant Glass Construction    Reduce Exposure for Sunrises or Sunsets    Effect Configured for Sun at Horizon    For Haida 100 or 100-Pro Filter Holder    Increases to Maximum Density at Center

• This filter is compatible with Haida 100 or 100-Pro Filter Holder.
• Effectively darken bright skies, specifically during a sunrise or sunset, while allowing for a normal, unaffected exposure in the other regions of the image.
• 3-stop band of density that tapers to a 1-stop density at the edge above it while directly above a clear area creates a neutral density pattern that matches the positioning of the sun when it is at, or immediately above, the horizon.
• 3-stop band of density extends approximately 15mm in both vertical directions.
• Density pattern corresponds to the brightness pattern of the sun when it appears at or is closer to the horizon as opposed to a higher angle, which creates an increase in brightness that is more prominent on both sides of the sun than above it.
• Hard-edged line of transition between the 3-stop band of density and the clear area below it is useful for hard transitions between the sky and land.
• 3-stop to 1-stop gradation with soft-edged line of transition is applicable to multiple regions of brightness within the sky.
• Filter does not affect the overall coloration of the image.
• Filter features shock-resistant optical glass construction.
• 10 layers of antireflective nano coatings on each glass surface prevent internal ghosting and reflections, while further enhancing clarity and color fidelity.
• 10 additional scratch-resistant hydrophobic coatings on each glass surface further protect the filter substrate and result in an improved beading effect when in contact with water or oil for greater cleaning efficiency.
• Rounded edges offer easier placement within a compatible filter holder slot.
• When combined with a compatible filter holder, included gasket helps to prevent light from coming in between the filter and the lens behind it, which can have an unwanted effect on exposure.
• Fabric filter pouch is included for storage and transport.

Related Questions and Answers

Q: 1. What is the actuall height of the stand? Specs say 2.7m, but when covert inch to m, it only around 2.2m?

A: Sorry conversion incorrect 89 should be 226. cm or 2.26 m

Q: 2. Will this stand hold an Aputure 120D ii with an Aputure Light Dome ii?

A: Full size light dome is pushing it. Would recommend a heavier duty stand. Works well with the light dome mini though.

Q: 3. Can these easily hold a dimmer and DTap battery hanging from it?

A: These are rated for 9lbs. I use mine with a lot more than a DTap battery and its fine.

Q: 4. What is the minimum operating height for this stand? Obviously the “folded” length is 20”, but not operating height unless the legs expanded flat to the floor.

A: As long as the center is just off the floor its fine. 20.25" more or less.

Q: 5. Is the card compatible with Canon 5D Mark IV?

A: No, Lexar 128GB Professional CFexpress Type B Card DIAMOND Series is not compatible with the Canon 5d Mark IV. That camera uses Compact Flash or SD cards, not CFExpress.

Q: 6. Is this stand air cushioned?

A: This stand is not air cushioned.

Q: 7. Can I use on both Windows 10 and MacPro OS without formatting it for either?

A: Yes you can use on both windows and Mac OS X it has software switch.

Q: 8. Does anyone know if the Peak Design camera cubes fit in this back pack? I already have the large and medium Peak Cubes.

A: The interior of the f-stop AJNA 37L DuraDiamond 37L is about 11.5 x 15 x 7 inches so the Peak medium cube will fit while the large will not.

Q: 9. I never used a stand this small before. I need something low that can hold a Godox ad400 pro and 3x3 soft box. Am I pushing it?

A: Yes, you are pushing it, The Matthews MERF Mini Extendable Reverse Stand is made for small flashes like speedlights. Chances are it will tip over with the AD400pro and a softbox.

Q: 10. Looking for a travel solution. Will theses stands be good for boom and shotgun / aputure 60d w/ soft mix mini ii?

A: The Matthews MERF Mini Extendable Reverse Stand would work well for holding an Aputure 60d light; it might work as a boom for a very lightweight mic, but putting weight on the legs would be a good idea.