The FotodioX WonderPana 6.6" Holder Bracket is 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 Tokina AT-X 16-28mm f/2.8 Pro FX    WonderPana FreeArc Core Unit, Lens Cap    WonderPana 6.6" Holder Bracket    6.6 x 8.5" Graduated ND 0.9 Filter    Soft-Edged Line of Transition    Up to 8x Filter Factor, 3-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. Looking for a lens to shoot real estate, has anyone had any experience with this lens and real estate photography?

A: Very good choice. Barrel distortion is well controlled with this lens. Use a tripod whenever possible and take advantage of the tripod's bubble level or use in camera leveling aids for best results. Consider using middle aperture settings for very best performance.

Q: 2. will this lens work on a nikon Z6/Z7?

A: Directly no, you will need the FTZ adapter to use this lens on a Z6/Z7.

Q: 3. What filter holder system can I use for this lens?

A: Depending on the filters you require, the Fotodiox WonderPana system offers some choices for this lens. BH# FOW145ND1628

Q: 4. Does this Tray with both the filters take up only a single slot in the matte box?

A: No, The Tiffen Multi Rota Tray Variable Neutral Density Kit comes with one rotating Circular Polarizer Tray. When combined with one of the included 4x5.65" Circular Polarizer it becomes a Variable ND solution. However, the 4x5.65" Circular Polarizer would take up another space/slot in your Matte Box. A second 4x5.65" Circular Polarizer is included as a backup.

Q: 5. Will this filter adapter fits that Tokina Opera 16-28 mm?

A: When it comes to ultra wide filter adapters, we go by the rule they will only fit the lens in their name. We will have to say no at this time.

Q: 6. Will this lens auto focus with the nikon z system?

A: This lens would autofocus on Nikon Z system cameras by way of the Nikon FTZ Adapter, B&H # NIFTZ. https://bhpho.to/2RhPEgu

Q: 7. Does this fit with the Arri LMB 4x5 Matte Box?

A: Please visit a href= https://tiffen.com/mrt-compatibility-2/ target= _blank https://tiffen.com/mrt-compatibility-2//a for compatibility information

Q: 8. Fotodiox WonderPana system

A: Yes, Fotodiox makes a system fort the Tokina 16-28mm, click the link below to view; https://bhpho.to/32xNQWz

Q: 9. Does the lens have hard stops for focus and zoom?

A: The Tokina opera 16-28mm f/2.8 FF Lens for Canon EF has hard stops for zoom but not for manual focusing. The same is true for this lens in the Nikon version.

Q: 10. Can this VND setup be used next to another Rota Tray with just a CP, so I can have both VND and CP? Will this work?

A: The Tiffen Multi Rota Tray Variable Neutral Density Kit with Extra 4x5.65" Circular Polarizer has a rotating ROUND CP that is permanently in the tray, and could be used alone for CP. When combined with one of the included Tiffen 4 x 5.65" Circular Polarizer Filters, which would take up another space in your Matte Box, it becomes a variable ND solution. Tiffen also includes a spare 4x5.65" Circular Polarizer as a backup.