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 Rokinon/Samyang 14mm f/2.8    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    Soft-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. Can any of these filters be purchased individually? All I really need is the ND1000 (112mm).

A: Here we list the Kase 112mm ND1000 filter on its own. https://www.bhphotovideo.com/c/product/1630125-REG/kase_1121060007_112mm_nd1000_filter.html

Q: 2. does this come with a case?

A: Yes.

Q: 3. I have ordered some 4 polyester CC filters, in snap holders. I am wondering if the plastic frames will slide into this holder? I know about the holder that uses a rubber band, but this holder would be good for other lenses + multiple filters.

A: The Lee foundation kit works with 2mm thick filters and you can get other guards that work with 4mm thick filters. If your CC filter holder is not thicker than 4mm you can get those other guides. But they cannot be wider than 4 inches on one side.The 4mm guides are at this link a href= http://bhpho.to/1BHprZI. target= _blank http://bhpho.to/1BHprZI./a

Q: 4. Is there a setting with no density: i.e., a completely clear setting?

A: The lowest density on that filter is 2 stop reduction of light.

Q: 5. 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: 6. can I use Cokin z-pro holder with lee filters? Cokin holder is much cheaper, what is the quality difference?

A: I have never tried. Lee is very heavy duty.

Q: 7. 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: 8. will there be any vignetting when using a canon 16-35mm f4 on a full frame camera? thx

A: There will be no vignetting using this holder on that lens.

Q: 9. Will this LEE Foundation Kit support Hitech 85 filters ?

A: No. There is no way to adapt the smaller Hitech 85mm wide filters to the 100mm Lee filter holder. This would result in incomplete frame coverage. You would be better off using a Hitech 85 or Cokin P Holder, if you want to stick with the Hitech 85 filters::Cokin P-Series Filter HolderB&H # COFHP ? Mfr # CBP400AHitech 85mm Aluminum Modular Filter HolderB&H # HIAMFH85 ? Mfr # HT85AMHYou can use the Lee Foundation Kit with 100mm Hitech filters, by using these extension slides:LEE Filters Extension Slides for Hitech Filters (3 Pairs)B&H # LEES ? Mfr # SLIDESThis wider format would be useful for ultra-wide lenses (ex. 17-35mm).

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.