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 Sigma 20mm f/1.4 DG HSM Art    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 0.9 Filter    Soft-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. 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: 2. Can I use screw-on filters (such as polarizers and graduated neutral density filters by Tiffen) simultaneously with this filter system? I read that it requires an adapter ring with the 24-70mm f/2.8 lens...will that work while having a screw-on filter on?Thank you :)

A: Yes, in theory but possibly not the way you are thinking. This system needs an adapter ring to attach it to your lens. For example, the 82mm adapter ring (linked below) fits the Canon 24-70/2.8L II threads. You then attach the filter holder to that and use the slots in the filter holder to hold the various glass or resin filters you want to use. If you want to use other types of filters such as a circular polarizer, then you attach the threaded 105mm adapter ring (linked below) to the front of the holder and screw your other filter into that. So, in theory if your Tiffen filters are 105mm (or if you have a step up ring from whatever size your Tiffen filter are to 105mm) then yes, you can also use them with this kit. However, stacking all this stuff will cause some vignetting. With two filter slots and the circular polarizer in use on this kit, the widest I can go is about 28mm on full frame.

Q: 3. Can this match with LEE Filters Adapter Ring for Canon 17mm TS-E Lens and LEE Filters Adapter Ring - 82mm - for Wide Angle Lenses ?

A: The Canon 17mm T/S lens does not accept filter rings and its front lens element protrudes so far past the lens barrel it's not likely to let you mount any filter without vignetting. You can get more information about what Lee filters fit which lenses using their lens matching utility at their website.This message system will not allow me to provide the actual address, but they call it their system match utility and you can find it by appending /index.php/camera/system-match to their basic web address (without the quotes, of course).

Q: 4. Can the filter holder support lenses with diameter 52mm as well as 105mm. Is there a adapter ring available for 105mm?

A: Both the LEE Filters Adapter Ring - 52mm, B&H # LEAR52, and the LEE Filters Adapter Ring - 105mm - for Long Lenses, B&H # LEAR105, may be used with the LEE Filters Foundation Kit (Standard 4x4 , 4x6 Filter Holder) (Requires Adapter Ring).

Q: 5. Can I use Cokin Z Pro filters with the Lee Foundation kit?

A: The quick answer is yes, the Cokin filters will fit in the Lee Foundation Kit.

Q: 6. Is this compatible with my lens 15-30mm tamron G2 ?

A: No, the LEE Filters Foundation Kit (Standard 4x4", 4x6" Filter Holder) is not compatible for use with the Tamron SP 15-30mm f/2.8 Di VC USD G2 Lens. If you are looking for a LEE Filters filter holder that is compatible for use with the Tamron SP 15-30mm f/2.8 Di VC USD G2 Lens, I would recommend the LEE Filters SW150 Mark II Filter System Holder for Wide-Angle Lenses, BH #LESHSW, and the LEE Filters SW150 Mark II Lens Adapter for Tamron SP 15-30mm f/2.8 Di VC USD Lens, B&H # LEASWT1530, which uses the larger 150mm (6 inch) wide filters.

Q: 7. Hello, I have a canon 24-70mm II USM, If go with this kit, which adapter ring I will need to get? specifically 82mm normal or the wide angle adapter?

A: Go with the wide angle, will help when shooting at 24-35mm

Q: 8. Is this the Lee 100mm filter holder?

A: yes, if you have more than one lens and they are different mm sizes, you will need an adapter ring for each one. such as 77mm, 82mm, 72mm.

Q: 9. 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: 10. I want to use this with Nikon 24mm f/1.4 lens---is the 77mm wide angle adapter ring or 77mm Lee FK adapter ring which one that i need?Can you able to send me the link to purchase for this ring? Tks.

A: I would suggest using the Lee 77mm Adapter Ring for Wide Angle lenses with the Nikon 24-mm f/1.4. Here is a link for that adapter ring:http://bhpho.to/1jrr44R