This WonderPana FreeArc Core Unit from FotodioX is designed to specifically fit the Tokina AF 10-17mm f/3.5-4.5 AT-X 107 AF DX NH fisheye lens, as well as a separately available WonderPana 6.6" Holder Bracket. Those items can be combined to 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. A compatible 145mm inner-pinch lens cap for 145mm FotodioX round filters is also provided.

The included WonderPana FreeArc Core Unit consists of a compression front filter ring. Use of the WonderPana 6.6" Holder Bracket is easily accomplished by separately attaching its two assembly pieces to opposite sides of this WonderPana Core Unit using the six included brass short screws. Pretapped threaded inserts along the edge of this Core Unit accommodate those screws and ensure correct positioning of the two assembly pieces so that they are placed parallel to each other and can hold a 6.6" wide filter between them. The combined WonderPana Core Unit and WonderPana 6.6" Holder Bracket can then be attached to a Tokina AF 10-17mm f/3.5-4.5 AT-X 107 AF DX NH fisheye lens by tightening the Core Unit's locking mechanism.

After being fitted onto a Tokina AF 10-17mm f/3.5-4.5 AT-X 107 AF DX NH fisheye lens, the bearing design of this WonderPana FreeArc Core Unit 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.

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. Pretapped 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 is 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.

This FotodioX WonderPana FreeArc Core Unit includes front filter threads, which allow a FotodioX 145mm round filter to be used along with a WonderPana 6.6" Holder Bracket. If a 145m round filter is used on the attached WonderPana FreeArc Core Unit, the rectangular filter slot closest to the rear of the holder bracket becomes unavailable.

The FotodioX 145mm Center-Pinch Snap-On Lens Cap for Select WonderPana Systems and Filters is a 145mm front lens cap with a squeeze, spring, and snap-on mechanism. It is easy to install as well as remove and can attach to a WonderPana FreeArc filter holder system in order to protect the front element of a lens that any one of those systems is mounted on. Additionally, with the exception of the FotodioX Ultra Slim filters, this lens cap can be used to protect a FotodioX 145mm filter that is mounted on a FotodioX WonderPana FreeArc filter holder system.

Lens caps protect your lens or filter from scratches, fingerprints, and the elements when the lens or filter is not in use.

For Tokina AF 10-17mm f/3.5-4.5 Fisheye    WonderPana FreeArc Core Unit    Use with WonderPana 6.6" Holder Bracket    With Bracket, Holds 6.6" Wide Filters    Bracket Rotates 360° with FreeArc    Holds up to Two 6.6" Wide Filters    Combine a 6.6" Wide and a 145mm Filter    145mm Center-Pinch Snap-On Lens Cap

• Compatible with a Tokina AF 10-17mm f/3.5-4.5 AT-X 107 AF DX NH fisheye lens
• Accommodates a separately available WonderPana 6.6" Holder Bracket
• With a WonderPana 6.6" Holder Bracket, 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 behind it
• Allows a WonderPana 6.6" Holder Bracket to be rotated 360° so that rectangular filters placed within it can be angled to the best position relative to the subject in front of the camera
• Includes 145mm front filter threads, which allow a FotodioX 145mm round filter to be used along with a WonderPana 6.6" Holder Bracket
• Constructed from aluminum alloy for durability while remaining lightweight
• 145mm front lens cap with a squeeze, spring, and snap-on mechanism

Related Questions and Answers

Q: 1. Will this lens auto focus on a Nikon D300?

A: Yes, it will autofocus on the D300. The D300 does not have any focus restrictions or special requirements. It will autofocus with any autofocus lenses made by Nikon or for the Nikon AF system by other manufacturers.

Q: 2. This len is compatible with nikon D7200?

A: Yes! I use it on my D7200. I love it!

Q: 3. Will this lens still autofocus when combined with a Nikon D90? Setting up for some underwater photography and want to make sure I still have autofocus capability.

A: The Tokina 10-17mm lens will be fully compatible with the Nikon D90, including autofocus. This lens is an excellent option for underwater photography with the D90.

Q: 4. Is the lens hood removable?

A: No the lens hood is not removable

Q: 5. Will this Core Unit fit a Canon R3? I was not sure if its better to get the DSLR version for my Shimoda Carry On v2?

A: Not really. The Shimoda Designs Large Core Unit for Mirrorless Camera is 4.7 inches tall and if you want to put your Canon r3 standing up with a lens attached, it needs to be approxemelty 5.6 inches, The Shimoda Designs Large DSLR Core Unit Version 2 (Parisian Nights) is 6.3 inches. So, that is the better way to go, https://bhpho.to/3k6xgZz .

Q: 6. Have yet to begin learning post production with Photoshop Lightroom CC. Is this lens in particular included in those programs for distortion correction?

A: Yes, there are profiles available for the 10-17mm lens in Photoshop Lightroom

Q: 7. Im beginning to shoot indoor real estate work and Im looking at this as well as the Tokina 11-20mm F2.8. How do the two compare in image and build quality?

A: The 11-20 would probably be better for indoor real estate shooting, as it is rectilinear, while the 10-17 is an actual fisheye lens.

Q: 8. Has anyone actually tried this with an FX camera, like a D750? What I've read says that you get normal fisheye effect--without vignetting or circular image--at the 17 mm range. Or does this lens make the camera switch automatically to DX crop factor?

A: As far as I know, the D750 format needs to be changed manually from FX to DX.

Q: 9. This len is compatible with nikon D7200?

A: Yes, it is.

Q: 10. Does this Filter Holder work with Rokinon DSX 14mm EF-Mount cinema lens?

A: No, the FotodioX WonderPana 145 Core Unit Kit for Rokinon/Samyang AF 14mm f/2.8 RF/FE does not fit onto the Rokinon DSX 14mm EF-Mount cinema lens.