The FotodioX WonderPana FreeArc XL Kit for Canon 11-24mm Lensis 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 Canon EF 11-24mm f/4L USM    WonderPana FreeArc XL Core, Lens Cap    WonderPana 8.0" Holder Bracket    186mm Solid Neutral Density 1.5 Filter    32x Filter Factor, 5-Stop    Darkens Entire Image    7.9 x 10.2" Graduated ND 0.6 Filter    Up to 4x Filter Factor, 2-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. Would this lens be a good choice for group portraits?

A: I wouldn't use this for any kind of portraiture. This lens introduces a great deal of distortion which is great for many applications. I think of it as artistic distortion. But you don't want to distort people - they probably wouldn't like it at all.

Q: 2. Since front holder and rear collar when assembled block hood petal cutouts of 11-24mm lens, how bad is the vignetting?

A: The FotodioX WonderPana FreeArc XL Core Unit Kit for Canon 11-24mm Lens with 186mm Slim Circular Polarizer Filter will not vignette when mounted to the Canon 11-24mm Lens.

Q: 3. Does the filter holder or filters physically block any of the field of view of sigma 14-24 mm dg hsm f mount lense? Not dg dn

A: FotodioX WonderPana FreeArc XL Core Unit Kit for Sigma 14-24mm Art Lens with 8.0" Holder Bracket does not block any of the filed of view, also the filters don't block it either.

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. Do I need to buy another lens ring to fix this filter? This adapter is immediately attached to the lens or you need to buy something else? What is included with this filter?

A: What you see is in the photos is all you need if you want to use the polarizer. In the Box: FotodioX 186mm Slim Circular Polarizer Filter Filter Pouch Limited 2-Year Warranty FotodioX 186mm Center-Pinch Snap-On Lens Cap for Select WonderPana Systems & Filters Limited 2-Year Warranty WonderPana FreeArc XL Core Unit for Sigma 14-24mm f/2.8 DG HSM Art Lens Limited 2-Year Warranty If you want to use the square or rectangular filters, then you will need the brackets. Click on the link below to view; https://bhpho.to/32VgMWY

Q: 6. Is there ANY vignetting in the corners when using this filter holder for the Sigma 14-24/f2.8 ART?

A: Hi--it is likely that there is very slight vignetting using this filter holder at 14mm on that lens.

Q: 7. does any 145 filter fit on the front of this kit? How does this attach to the lens? I've looked for videos but can't find any. I can see it slides on but what keeps it in place? also if I buy this kit do I need anything besides 145 filters?

A: You will need filter holder # FO66HBWPFA

Q: 8. 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: 9. Has anyone used this for astrophotography? I know a 2.8 is more desirable for that type of shooting.

A: If you use this for Astro you would need to run longer shutter speeds which would either result in blurry stars (due to the movement) or increased noise due to increasing the ISO (to compensate for the light difference on a f/2.8 lens) But it's definitely more than possible depending on the camera it's being used on.

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.