The FotodioX WonderPana 6.6" Holder Bracket is a two-piece assembly designed to be used in combination with a FotodioX WonderPana FreeArc Core Unit, a WonderPana 145 Core Unit, or a WonderPana FreeArc Aluminum Step-Up Ring. A WonderPana Core Unit or a WonderPana FreeArc Aluminum Step-Up Ring with the WonderPana 6.6" Holder Bracket attached can then allow for the convenient use of two 2.5 to 4.0mm-thick filters measuring 6.6" wide, or one 2.5 to 4.0mm-thick filter measuring 6.6" wide along with one FotodioX 145mm round filter behind it.

Use of this holder bracket is easily accomplished by separately attaching its two assembly pieces to opposite sides of a WonderPana Core Unit or a WonderPana FreeArc Aluminum Step-Up Ring using the six included brass short-screws. Pre-tapped threaded inserts along the edge of a WonderPana Core Unit or FreeArc Aluminum Step-Up Ring accommodate those screws and ensure correct positioning of the two assembly pieces so that they are positioned parallel to each other and can hold a 6.6"-wide filter between them. The combined WonderPana Core Unit, or WonderPana FreeArc Aluminum Step-Up Ring, and WonderPana 6.6" Holder Bracket can then be attached to a compatible lens.

For WonderPana Core Units that consist of a rear lens collar and a front filter holder, pre-tapped threaded inserts along the edge of the front filter holder accommodate the six brass short-screws for correct positioning of the WonderPana 6.6" Holder Bracket's two assembly pieces. Once the holder bracket and a front filter holder are combined, and the separate collar has been slid over the rear of a compatible lens until it has achieved a secure fit, the front filter holder with the attached holder bracket can be screwed onto the front of the installed rear lens collar.

After being fitted onto a compatible lens, the bearing design of the WonderPana FreeArc Core Units and WonderPana FreeArc Aluminum Step-Up Rings allows a WonderPana 6.6" Holder Bracket to be rotated 360°. This permits the use of graduated neutral density and other filters that are enhanced by varied positioning. While a WonderPana 145 Core Unit does not include a 360° rotating mechanism, eight pre-tapped threaded inserts all around its edge allows the WonderPana 6.6" Holder Bracket to be installed in 45° increments so that rectangular filters placed within it can be angled to the best approximate position relative to the subject in front of the camera.

The FotodioX WonderPana 6.6" Holder Bracket provides two pairs of filter slots, a configuration that accommodates two compatible rectangular filters. For each rectangular filter that is placed within one of the holder bracket's slots, its position can be secured using the included brass long-screws. Pre-tapped threaded inserts along the outside of the holder bracket allow the long-screws to each apply pressure to a spring-loaded retainer within each filter slot. When a pair of the long-screws are used, the level of grip upon a rectangular filter can be varied, which can complement the use of graduated filters whose effect can be adjusted to better suit changing lighting conditions or creative demands by sliding them up or down within a filter slot.

Each FotodioX WonderPana Core Unit or WonderPana FreeArc Aluminum Step-Up Ring includes front filter threads, which allow a FotodioX 145mm round filter to be used along with this filter holder. If a 145mm round filter is used on the attached WonderPana Core Unit or WonderPana FreeArc Aluminum Step-Up Ring, the rectangular filter slot closest to the rear of the holder bracket becomes unavailable. The WonderPana 6.6" Holder Bracket features a lightweight, aluminum-alloy construction that has a corrosion-resistant, black anodized finish for durability. A rigid pouch is included for storage and transport.

For FUJIFILM XF 8-16mm f/2.8 R LM WR    WonderPana FreeArc Core Unit, Lens Cap    WonderPana 6.6" Holder Bracket    145mm Solid Neutral Density 1.2 Filter    16x Filter Factor, 4-Stop    Darkens Entire Image    6.6 x 8.5" Graduated ND 0.9 Filter    Hard-Edged Line of Transition    Up to 8x Filter Factor, 3-Stop    Reduce Exposure in Selective Areas

• When used with a FotodioX WonderPana FreeArc Core Unit, a WonderPana 145 Core Unit, or a WonderPana FreeArc Aluminum Step-Up Ring, allows for the convenient use of two filters measuring 6.6" wide, or one filter measuring 6.6" wide along with one FotodioX 145mm round filter installed on a Core Unit or FreeArc Aluminum Step-Up Ring
• Provides two pairs of filter slots, a configuration that accommodates up to two 2.5 to 4.0mm-thick rectangular filters
• Allows up to two compatible rectangular filters to be rotated 360° when used with a FotodioX WonderPana FreeArc Core Unit or WonderPana FreeArc Aluminum Step-Up Ring
• When used with a WonderPana 145 Core Unit, allows up to two compatible rectangular filters to be installed in 45° increments so that a filter placed within it can be angled to the best approximate position relative to the subject in front of the camera
• Ability to vary grip on each installed rectangular filter to complement the use of graduated filters whose effect can be adjusted to better suit changing lighting conditions or creative demands by sliding them up or down within a filter slot
• Lightweight, aluminum-alloy construction with a corrosion-resistant, black anodized finish for durability
• Rigid pouch included for storage and transport

Related Questions and Answers

Q: 1. Does KASE make a UV filter that can fit this kit without using threads?

A: No. UV are not available at the given moment.

Q: 2. How does this differ from the Kase 77mm Wolverine Magnetic Professional Neutral Density Filter Kit II (BH #KAMGKITPRC77 MFR #KW-MGKITPROC-77)?

A: The Kase Wolverine Stack Kit (KAMGKITSC77) comes with the rear-filter cap that enables a more streamlined system for storing and carrying your filters, with the caps at the top and bottom of the stack. The other kit you have linked only comes with a front lens cap.

Q: 3. Will the Canon RF 15-35 lens hood fit over the magnetic adapter ring?

A: The lens hood for the Canon RF 15-35mm lens would not fit over the magnetic adapter ring of the Kase 82mm Wolverine Magnetic Professional Neutral Density Stack Kit.

Q: 4. What is Included? Magnetic UV Filter, ND Filter, Lens Cap, Microfiber Cleaning Cloth, Magnetic Hard Case？

A: Kit Includes Magnetic UV Filter, ND Filter, Lens Cap for UV Filters, Microfiber Cleaning Cloth, Magnetic Hard Case.

Q: 5. With the 77mm magnetic adapter ring attached to my Sony 24-100mm lens (also 77mm thread), can the lens hood still be used? And same question for the 100-400 mm lens.

A: Yes, it is possible to use the Sony lens hood when using the Kase 77mm Wolverine Magnetic Professional Neutral Density Filter Kit II on your lens.

Q: 6. Will this fit the Nikon NIKKOR Z 14-24mm f/2.8 S Lens?

A: You can stack up to 2 filters on the Nikon 14-24mm Z lens and there will be no vignetting. If you stack 3 filters, vignetting would occur at 17mm or wider.

Q: 7. So this is not a CPL? In the first picture it clearly indicates it is CPL but everything else in the listing including the title suggests that it's an ND filter and not a Circular Polarizer Linear lens filter.

A: This is not a CPL, it is a solid ND. I will email the webmaster to double check on the photo.

Q: 8. Is this compatible with the Fujifilm 8-16mm lens?

A: The Kase Clip-In ND64 Neutral Density Filter for FUJIFILM X-Series Cameras (6-Stop) is inserted into the front of the camera, over the sensor. This Filter is compatible with the Fujifilm 8-16mm lens if this lens is worn by a Fujifilm X-H1, X-H2, X-T3, X-T4, X-T5, X-T30, X-S10, or X-Pro3.

Q: 9. Will this work with NIKKOR 14-24mm F2.8G ED? How many filters can be stacked before vignetting.

A: Unfortunately, this kit is not compatible with Nikon AF-S NIKKOR 14-24mm f/2.8G ED Lens. You will need a dedicated lens adaptor for your Nikon lens. There are a couple of options that allow circular filters to be mounted in front of the lens, but they are usually 150mm ring size or larger.

Q: 10. What's the difference between this kit and the very similar #KW-MGKITPROC-82 (https://www.bhphotovideo.com/c/product/1533019-REG/kase_kw_mgkitproc_82_82mm_pro_kit.html/qa)?

A: The more expensive kit comes with a stack cap instead of just a lens cap. Which consists of a front and rear cap.