The FotodioX WonderPana FreeArc Core Unit for Sigma 14mm Lensis 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 14mm f/2.8 EX Aspherical HSM    WonderPana FreeArc Core Unit, Lens Cap    WonderPana 6.6" Holder Bracket    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    145mm Circular Polarizer Filter    1.25 to 8x Filter Factor, +0.3 to 3-Stop    Helps to Eliminate Reflections and Glare

• 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. When will it be released? Announced 3 months ago but still no word. Milkyway already out

A: Unfortunately there is not a current ETA available for this lens.

Q: 2. Hi This lens can be use on Lumix GX8?

A: This lens is not compatible with a Lumix GX8.

Q: 3. Will this lens mount and work on a Sigma SA-5 film body?

A: Technically, the Sigma 14mm f/1.8 DG HSM Art Lens for Sigma SA should work fine on the Sigma SA-5. It uses an SA mount, but being that old, it has not been tested with that lens.

Q: 4. What size Luxgear do we need for the focus ring?

A: This lens has an outer diameter of 95.4mm, we do not have a Cool Lux Gear that will be large enough for this lens. Instead we recommend the Wide Open Camera Universal Lens Gear, B&H # WILU. https://bhpho.to/2mtNn2G

Q: 5. Will this lens fit on a canon eos R?

A: Yes, with the EF-RF adapter.

Q: 6. I have a Nikon D300, will try camera work with the Sigma 14mm F/1.8 DG HSM Art Lens?

A: Yes although you will have a 35mm equivalent of 21mm.

Q: 7. What size Front Lens Cover is required, if I want a spare?

A: The design of the Sigma 14mm f/1.4 DG DN Art Lens (Sony E) prevents it from working with a generic lens cap. It only works with this one, Sigma Lens Cap Cover for 14mm f/1.4 DG DN Art Lens, BH #SILC101401 • MFR #LC1014-01.

Q: 8. Does this lens have a hard stop when focusing to infinity? (Astro)

A: This lens is an auto focus lens therefore it is focus by wire and does not have a hard stop.

Q: 9. Is there any underwater housing that can fit this lens?

A: It would depend on the housing you are using, I would recommend contacting uw@bhphoto.com and let them know what equipment you are using so they would be able to recommend a suitable option.

Q: 10. What Filter diameter does the lense have?

A: it has a special dedicated filter that attaches at the other end of the lens. fancy, I just learned this, so I'm guessing no thread