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 Canon TS-E 17mm f/4L    WonderPana FreeArc Core Unit, Lens Cap    WonderPana 6.6" Holder Bracket    145mm Solid Neutral Density 3.0 Filter    1000x Filter Factor, 10-Stop    Darkens Entire Image    6.6 x 8.5" Graduated ND 0.6 Filter    Hard-Edged Line of Transition    Up to 4x Filter Factor, 2-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. 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.

Q: 2. I am parallely using cannon 16-35 and 17-40. will it work with these cannon lenses ?

A: Yes, it will work with a Canon 16-35 and 17-40. You just need to make sure that you purchase the correct adapter ring. The 17-40 requires a 77 mm adapter ring and the 16-35 f/2.8 II requires an 82 mm adapter ring and the 16-35 mm f/4 requires a 77 mm adapter ring.

Q: 3. 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: 4. Does this have IR filtration built in? Because I plan on using it with a BMPCC 6K and don't want IR pollution changing the colors as I step down.

A: The PolarPro 82mm Peter McKinnon Edition Variable Neutral Density filter is made of Quartz Glass. Quartz Glass has excetionally high tramissision of the entire visible spectrum inclding UV and IR. If you need UV filtration use a seperate UV filter.

Q: 5. 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: 6. hi im buyng from bh a zeiss 21mmf2.8 lens and id like to know if the fkit+adp.ring wa82+adp.ring+105mm polar filter will do vignetting on a full frame cmera.

A: You may get vignetting with the addition of the 105mm Polarizer on the Foundation holder. If the 82mm wide angle ring and Foundation holder where used alone, the likelihood that it would vignette would be less.

Q: 7. Can everything in the kit fit in the storage pouch?

A: Yes the whole kit fits into the pouch.

Q: 8. do the filter eliminate IR pollution?

A: No, that filter does not reduce IR pollution. It is a Variable Neutral Density filter. The filter only reduces the amount of all light getting through.

Q: 9. I originally purchased this system for my Canon 5D Mark III and lenses, but am in the processing of switching to Fuji XT1. Will this system work on the fuji. I have two lenses adapters 77mm and 67 mm so wondering if they will fit on Fuji lenses of the same size?

A: The 77mm and 67mm Lee Filter Adapter Rings should fit on lens with 77mm and 67mm filter thread sizes, respectively. The brand of the lens should not matter. I have used the Lee Filter Adapter rings on Canon, Nikon and Sony lens without issues. If you are using wide angle lens, I suggest you consider the wide angle adapter rings to minimize vignetting (in my experience, lens with less than 25mm focal length - taking into consideration the crop factor of the APS sensor). Of course you can correct with Photoshop. I hope this helps.

Q: 10. 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.