This 4-stop, 6.6 x 6.6" Tiffen 85/ND Filter 6.6"x6.6" (4-Stop)from Tiffen 85/ND Filter 6.6"x6.6" (4-Stop)consists of a neutral density 1.2 and a Wratten 85 filter. This filter reduces the amount of light passing through the camera lens without changing the color of the scene. It is especially useful in bright light conditions to help prevent overexposure. Neutral density filters also allow proper exposure at a wider lens opening for reduced depth of field to highlight a key subject by making the foreground and/or background out of focus.

1.2 Optical Density

Related Questions and Answers

Q: 1. Is this filter compatible with the Moment M-series lens - 67mm filter adapter?

A: No, the Tiffen 62mm Variable Neutral Density Filter is not the correct size for the Moment M-Series Lens 67mm Filter Mount. One would need to get the Tiffen 67mm Variable Neutral Density Filter, BH #TIVND67 (https://bhpho.to/3FUZ4GR).

Q: 2. Will this fit in my Canon 600mm prime as a drop in filter?

A: Yes, the Tiffen Solar ND Filter (52mm, 18-Stop, Special 50th Anniversary Edition) will fit into the drop in filter of the Canon 600mm f4L.

Q: 3. Is this filter ISO 12312-2:2015 compliant?

A: No, the Tiffen Solar ND Filter (67mm, 18-Stop, Special 50th Anniversary Edition) is not ISO 12312-2 compliant and therefore not safe for direct viewing of the Sun. The filter, like most on the market, will protect your camera and allows for safe solar photography only. It's advised that you still wear protective eyewear.

Q: 4. Does this filter fit Cokin P holder?

A: Yes, it will fit either the Formatt Hitech or Cokin P Series filter holder.

Q: 5. will the 46mm filter work in the drop-in slot of the sigma 300-800 lens?

A: The Tiffen Solar ND Filter (46mm, 18-Stop, Special 50th Anniversary Edition) will fit in the drop in slot of the Sigma 300-800mm lens. However, a solar filter needs to be placed on the front of a lens in order to prevent damage to the lens or camera. You can use this MrStarGuy Natural Light Adjustable Solar Filter (145-175mm OD) on the front of your lens: https://bhpho.to/4bCo9pp

Q: 6. Does this filter have front filter threads to stack another filter?

A: yes there is a thread on front to stack more filters

Q: 7. What is the material of the ring? Aluminum? Brass?

A: Aluminum

Q: 8. What is the weight of this filter?

A: I dont know.

Q: 9. How is it ok for shooting the sun but not for viewing with the naked eye? How do you compose & shoot without viewing the frame?

A: The camera is not as sensitive to infrared and uv from the sun like the naked eye is. You can compose and shoot using the LCD live view.

Q: 10. which clip-on mattebox works with this filter?

A: A rotating filter, like the Tiffen 82mm Variable Neutral Density Filter, is not compatible with clip-on matte boxes.