The FotodioX WonderPana FreeArc XL Kit for Sigma 14-24mm Art 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 Sigma 14-24mm f/2.8 DG HSM Art    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. Is there anyway to attach an ND filter on this lens?

A: Aside from using cut gelatin filters in the included rear filter holder, you can also use the NiSi S5 150mm Filter Holder Kit with Circular Polarizer for Sigma 14-24mm Art Lens, B&H # NIFH150S1424, which is able to accept 150mm ND filters that are 2mm thick. https://bhpho.to/2RkN8VO

Q: 2. Is this lens internal zoom?

A: This lens does offer an internal zoom.

Q: 3. Can this lens use on Leica T (Typ 701)?

A: Yes the Sigma 14-24mm f/2.8 DG DN Art Lens for Leica L is compatible with the Leica T 701 camera.

Q: 4. What is the size of the rear filter? Would a 29x29mm and 0.1mm thick filter fit?

A: Although Sigma does not specify the filter size you can use, they do include a filter guide which will allow you to cut the filter to size so it can fit into the back of the lens. A example of a filter that can be used would be a Kodak 3 x 3" Neutral Density (ND) #96 0.90 Optical Gelatin Wratten Filter, B&H # #KOND.99633O. https://bhpho.to/2MpcdML

Q: 5. Does this lens use a usb hub for firmware updates?

A: At this point and time, there is no Sigma USB Dock for Sony E Lenses.

Q: 6. I am planning a trip to Tibet and at high altitude the recommendation was to have a UV filter. How would this lens work when light is sharp and in that environ?

A: This is an excellent wide angle zoom lens to travel with. There is a rear filter slot for gel filters. At high altitudes a UV2B is recommended. Lee filters manufactures 3x3 polyester gels that you can cut to size. Currently in stock at B&H. Please click on the link for more information: https://www.bhphotovideo.com/c/product/102750-REG/LEE_Filters_2BP_4x4_UV_2b_Polyester_Filter.html

Q: 7. WILL ANY SONY E MOUNT LENS FIT THE SIGMA FP ?

A: No, the Sigma FP uses L mount series lenses only.

Q: 8. How does the rear filter work? Is there a front filter thread?

A: You must cut gel filter to fit the rear holder. It must be dust and scratch free or the sensor will pick those up. Since you cannot adjust the rear filter, grads or Polarizers are not normally used. Basically you are limited to ND's. Here are the available gel filters. https://bhpho.to/2XIaTYY Like most any extreme wide angle lens, the front element is so bulbous, a screw-in filter is not possible. What should be available soon from the main filter manufacturers such as Lee, NiSi, and FotoDiox is a filter holder that will take 150mm rectangular filters.

Q: 9. Can this lens keep up with a9's 20fps (with autofocus between shots) ?

A: Yes this lens is capable of keeping up with the 20 FPS continuous shooting rate of the Sony A9.

Q: 10. how close to the subject can you get with this lens?

A: Minimum Focus Distance is 11".