The FotodioX WonderPana 8.0" Holder Bracket is a two-piece assembly designed to be used in combination with a FotodioX WonderPana FreeArc XL Core Unit or a WonderPana XL Aluminum Step-Up Ring. Attaching the WonderPana 8.0" Holder Bracket to a WonderPana FreeArc XL Core Unit or a WonderPana XL Aluminum Step-Up Ring can allow for the convenient use of two 2.0mm-thick filters measuring 7.9" wide, or one 2.0mm-thick filter measuring 7.9" wide along with one FotodioX 186mm 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 FreeArc XL Core Unit or a WonderPana XL Aluminum Step-Up Ring using six of the eight included brass short-screws. Pre-tapped threaded inserts along the edge of a WonderPana XL 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 7.9"-wide filter between them. The combined WonderPana XL Aluminum Step-Up Ring, and WonderPana 8.0" Holder Bracket can then be attached to a compatible lens.

For WonderPana FreeArc XL 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 six of the eight brass short-screws for correct positioning of the WonderPana 8.0" 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 XL Core Unit allows a WonderPana 8.0" Holder Bracket to be rotated 360°. This permits the use of graduated neutral density and other filters that are enhanced by varied positioning.

The FotodioX WonderPana 8.0" 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 is secured by integrated guides within each slot. These guides apply pressure along both sides of a filter that is sufficient to hold it in place, but permits movement of that filter. This 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.

The WonderPana 8.0" 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 12-24mm f/4 DG HSM Art    WonderPana FreeArc XL Core, Lens Cap    WonderPana 8.0" Holder Bracket    186mm Solid Neutral Density 1.2 Filter    16x Filter Factor, 4-Stop    Darkens Entire Image    7.9 x 10.2" Graduated ND 0.9 Filter    Up to 8x Filter Factor, 3-Stop    Reduce Exposure in Selective Areas    Soft-Edged Line of Transition

• When used with a FotodioX WonderPana FreeArc XL Core Unit or a WonderPana XL Aluminum Step-Up Ring, allows for the convenient use of two filters measuring 7.9" wide, or one filter measuring 7.9" wide along with one FotodioX 186mm round filter installed on a WonderPana FreeArc XL Core Unit or WonderPana XL Aluminum Step-Up Ring
• Provides two pairs of filter slots, a configuration that accommodates up to two 2.0mm-thick rectangular filters
• Allows up to two compatible rectangular filters to be rotated 360° when used with a FotodioX WonderPana FreeArc XL Core Unit
• Integrated guides within each filter slot apply pressure along both sides of a filter that is sufficient to hold it in place, but permits movement of that filter, complementing 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
• Microfiber cleaning cloth included, plus a rigid pouch for storage and transport

Related Questions and Answers

Q: 1. Can I stack both filters and will it cause vignetting?

A: Yes, it will but only at very wide apertures

Q: 2. 1) is there any 77mm filter? 2) is this made in China?

A: They do make a 77mm filter by Vu however it is a 2-stop (VUVSND277) unfortunately. And the item is made in China.

Q: 3. I need to use a clear or haze filter. Is it possible to utilize more than one filter at a time-a polarizer and an ND filter?

A: You cannot stack a uv filter on top of the Slim Circular Polarizer Filter included with the FotodioX WonderPana FreeArc XL Core Unit Kit for Sigma 14-24mm Art Lens with 186mm Slim Circular Polarizer Filter. Fotodiox 186mm filters are not designed with a front threads.

Q: 4. Any way to block lens flares with some sort of hood?

A: The 186mm Slim Circular Polarizer included with this kit does not have front threads, nor is there a hood to fit.

Q: 5. Does this kit come with one filter pouch that holds all 7 filters?

A: Yes it does!

Q: 6. Will this work on the new Sigma 12-24 Art?

A: It works well with the 11-24 canon so I can only assume that it will work with that lens. n Needs to be kept spotlessly clean so as to avoid flare abboration

Q: 7. I have a recessed light fixture trim with a built in LED light engine with an output of 840 lumens. This fixture is on the same switch/dimmer system as adjacent LED fixture with a lumen output of 450 lumens. How many layers/filters would I need to get the 840 lumen fixture's output down to the 400/500 lumen range ?

A: ND .03 is 1 stop. 1 stop is 100% more light up or 50% less down. To go from 800 to 400 you would need 1 layer.

Q: 8. does the canon version works with the new sony 12-24mm lens?

A: No, it only works with the Canon 11-24mm.

Q: 9. How does this fit the Sigma 12-24mm when the hood doesn't detach? Do I need another accessory?

A: Nothing additional is needed. This fits over the hood. There are a few filter holders on this page. For the Sigma 12-24mm Art Lens make sure to select the holder that is specifically for that lens. BH #FO186EKS1224 • MFR #WNDPN186-ESNTLCP-SM1224F4

Q: 10. Will this fit the Sigma 14-24 DG N sony e Mount?

A: Yes, if it is the Sigma DG DN Art lens.