The 4 x 5.65" Formatt Hitech ND Blender Filter 4x5.65 3-Stopfrom Formatt Hitech ND Blender Filter 4x5.65 3-Stopis compatible with filter holders that can accommodate 4 x 5.65" rectangular filters up to 4mm-thick. This filter is densest at one edge where it corresponds to a reduction of light from entering a lens by 3-stops and tapers to clear at the other edge. Its gradation can be used to selectively darken an image from edge to edge. While this graduated blender filter's 0.9 density can be applied to bright skies, the remaining regions of the image can be exposed with a progressively decreasing effect.

This filter is constructed from Schott glass for clarity and color fidelity. A padded pouch is included for storage and transport.

0.9 Optical Density    Graduated Effect Over Entire Image    Schott Glass Construction    No Transition Line    Allows Reduced Shutter Speed    Allows Wider Aperture    Includes Padded Pouch

• This filter is compatible with filter holders that can accommodate 4mm-thick, 4 x 5.65" rectangular filters.
• Densest at one edge where it corresponds to a reduction of light from entering a lens by 3-stops and tapers to clear at the other edge.
• Darken bright areas of an image, such as skies, while the remaining regions of the image can be exposed with a progressively decreasing effect.
• Maximum 0.9 density corresponds to an 8x filter factor.
• This filter is constructed from Scott Superwhite Glass for clarity and color fidelity.
• Padded filter pouch is included for storage and transport.

Related Questions and Answers

Q: 1. How much does the filter weigh?

A: I don't have the means to weigh the filter directly. I does not weigh more than any other of the B&W filters in this particular mount. You can go to the manufacturer website for this exact product and ask the weight question. B&W Photo does not permit inserting outside links, so do a Google Search on Schneider Optics, once on the website, copy and paste the manufacturer's part number that B&H Photo includes, that will give you the specifics on this product. Then you will have links to ask the weight question of an associate. I hope this helps.

Q: 2. Do these filters come with a front filter thread so you can attach a CPL Filter?

A: Yes, it has a 82mm front thread.

Q: 3. Is this filter too dark to focus / compose with the filter already mounted?

A: It depends of course on the amount of ambient lighting in your shot. My work flow is to focus first, shoot to check focus, exposure, and composition. You really need to see the image properly expose before adding the filter. Then I shoot a few images with various shutter speeds with the filter on. Eventually you will become intuitive about your exposure times.

Q: 4. Am I right to assume that a 58mm lens cap would fit over this filter?

A: Yes, technically a 58mm lens cap should fit. But filters like these can be wider. They essentially are made up of two polarizing filters sandwiched together. So they can be a bit wider because of that.

Q: 5. How does this attach to the phone? I have a clip on ND I'm not happy with since it has light leaking in.

A: The Kase ND64 6-Stop ND Filter for Smartphones BH #KA1117130001 would come with a stick on L-Shaped Magnetic Adapter that is semi-permanent adhesive.

Q: 6. Is this filter fit with fujinon 35mm lense?

A: There are several Fujinon 35mm lenses listed here on B&H and none of them seem to have a 43mm filter size. However, it could simply be that your lens isn't for sale here. Without more information on the lens this question cannot be answered. Can you provide more information about exactly which model of 35mm Fujinon lens you have?

Q: 7. What lens caps fit?

A: this should work , ZEISS 86mm Front Lens Cap B&H # ZEFLC86

Q: 8. Hello. I am looking to reduce my f-stop during panning shots. I do Motorsport photography and typically pan anywhere from 1/30th to 1/320. In that range, I’ve been up to f-18. I use the 300 f2.8 with both TC’s with exceptional results. My concern/question is, will this negatively affect or impact the AF system? Even though I already get a nice motion blur with panning techniques, I’d like to reduce the f-stop further to add some additional blurring in the out of focus areas. Any help here would be appreciated. Thanks.

A: This should not effect the focusing system much. If you were using anything 6-stop or more, the you may see varying results, but because it is only a 3-stop, you would be more than fine.

Q: 9. What is the thread pitch for this product 60 X .75? Are these external threads? Thanks

A: The B+W 60mm 0.6 ND MRC 102M Filter has a 0.75mm pitch which is standard for many filters.

Q: 10. Will this vignette with 7.5mm ultrawide Laowa lens?

A: You will get some vignetting when using this filter on the 7.5 but can be corrected in post.