The FotodioX WonderPana FreeArc Core Unit Kit for Canon 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 Canon EF 14mm f/2.8L II USM    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. What are the exact interior dimensions of this core unit? The description and the spec contradicts each other.

A: The exact interior dimensions of the Shimoda Designs Large Core Unit for Mirrorless Camera are 10.6W x 14.6H x 4.7"D.

Q: 2. Which of the Shimoda backpacks will this core fit into?

A: The Shimoda Designs DSLR V3 Core Unit (Large) will fit the the Shimoda X70, X50, v2 X40, and v2 X35.

Q: 3. Could you fit 2 small core units inside a 30L Shimodo Explore V2? Like, to use one for drone hear and the other for camera gear?

A: The Shimoda Designs Explore V2 30 Backpack will comfortably hold only one of the Shimoda Designs Small Core Unit for Mirrorless Camera. Two units will put too much strain on the zipper.

Q: 4. How can you buy more of the dividers for the core unit?

A: If you are looking to get more dividers for the Shimoda Designs Large Core Unit for Mirrorless Camera, you should consider purchasing the Shimoda Designs Divider Kit (River Blue), BH #SHDKDSLRRB.

Q: 5. Will this fit the Shimoda Designs Explore 40 backpack?

A: Yes, it should fit well. The backpack's main compartment measures 11.4 x 17.3 x 6.7" and this insert has external dimensions of 11.4 x 15.4 x 5.1".

Q: 6. Will this work in the x40 backpack?

A: The Shimoda Designs Small Core Unit for Mirrorless Camera will work inside the Shimoda Designs Action X40 V2 backpack.

Q: 7. will this fit in the Explore 60?

A: Yes, the Shimoda Designs DSLR V3 Core Unit (Large) will fit in the Shimoda Designs Explore 60 Backpack.

Q: 8. Will this unit work for a Nikon 180-600?

A: Yes, the Shimoda Designs Large Core Unit for Mirrorless Camera will fit the Nikon 180-600 lens.

Q: 9. Could I pack in here a Sony 100-400GM plus a 16-35GM attached to a Sony a7RIV both with their lens hoods?

A: If you have the lens hoods reversed on the lens in their storage position, then yes, you may use the Sony FE 100-400mm f/4.5-5.6 GM OSS Lens and the Sony Alpha a7R IV Mirrorless Digital Camera with the Sony FE 16-35mm f/2.8 GM Lens inside the Shimoda Designs Small Core Unit for Mirrorless Camera.

Q: 10. Description says it's for the X70 backpack. Also for the x70 HD, is that correct? This is the most current XXL core? Thanks.

A: Yes, the Shimoda Designs DV Core Unit (XX-Large) fits the X70 backpack and the X70 HD.