The Tiffen 6x6" Cool Blue Graduated Filterhelps to specifically add a cool, purplish-blue coloration to skies and other bright areas of an image while allowing a portion of the image to remain neutrally colored. The filter's coloring is densest at the edge and tapers to clear by the middle, with a soft-edged transition between the density and clear areas. The 3 color density provides less cool blue coloration than the 4 density, but more than the 2 density filter.

This filter is made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding flat to a tolerance of 1/10,000th of an inch. It measures 6 x 6" / 152.4 x 152.4mm.

3 Density Color Graduated Filter    Cool Blue Coloring in Select Areas    Soft-Step Graduation    ColorCore Technology

Provides a deep cool blue coloring to select areas of the image.

Graduated filter design keeps a portion of the image neutral, resulting in a more realistic look while allowing for the sky or other bright areas to take on the color of the density.

Related Questions and Answers

Q: 1. Can you explain silent gridcloth ? What would be the diff between this and a normal silk? Thank you!

A: Grid cloth in general would diffuse the light while focusing it down a bit. In the case of silent grid cloth, that would not produce any sound on your soundtrack when shooting in a windy environment. Other silks may produce a sound when working in the same conditions.

Q: 2. Whats the benefits of this over the non digital version for half the price? I notice the coating and titanium ring but my question is more about image/color quality.

A: This filter uses optical quality glass, is uncoated and uses an aluminum filter ring. The Digital HT version uses Water White (highest quality) glass, is multi-coated and uses a titanium coated ring. The mulit-coating makes the glass more scratch resistant, easier to clean and less chance of reflections. The HT filters meet or exceed military specifications as well. The difference in image color/quality will be tough to see when comparing the two, the difference is more in construction quality.

Q: 3. How wide a lens can you use this on without vignetting? I have a Canon 16-35 f/4 - will the filter work with the lens set at 16mm (on full frame body)? Thanks.

A: You should be fine with this filter, if you were to go to a wider focal length there will be vignetting issues.

Q: 4. Does this filter have any tags or other properties that allow you to align the gradient axis precisely with the camera axis?

A: No, the Tiffen 72mm Graduated Neutral Density Attenuator/Blender 1.2 Filter (4-Stop) does not have tags or any markings indicating the gradient axis.

Q: 5. Can you use this filter on top of a Circular Polarizer?

A: yes, you can. I always do

Q: 6. Does this have elastic corners?

A: The Matthews Butterfly/Overhead Fabric - 6x6' - Lite Silent Gridcloth BH #MAF66SGCL uses grommets for fastening to a frame.

Q: 7. Does this fabric have grommets for tieing to frames?

A: The fabric does have grommets for securing the fabric to a frame.

Q: 8. Do the Tiffen 4x4 filters use a Cokin filter holder? or what brand / size would be needed / recommended? I have a 72mm lens(18-200). I'm looking to purchase a grad-ND.6. Thank-you for your time,Janice

A: Yes, this particular Tiffen Graduated 0.9 ND filter is designed for use with the Cokin P filter holder, which you can purchase with a 72mm adapter ring included: http://bhpho.to/Uscl1gFor a 0.6 graduated ND filter, take a look at the Formatt Hitech 85mm Graduated ND 0.6 Soft Edge for Cokin P: http://bhpho.to/1xc1CV6

Q: 9. how long does one last?

A: They're not thin + delicate; they'll last forever (unless you let them touch the modeling light, but otherwise).. They're tough.

Q: 10. Which Day for Night Lens(es) fit a Canon Zoom EF-S 17-85mm Lens?

A: The Canon 17-85mm lens has a 67mm filter thread, so you would need the Tiffen 67mm Day for Night Lavender-Blue Cooling Filter (B&H # TICDFN67).