The Tiffen 138mm (Rotating Mount) Warm Linear Ultra Polarizing Water White Glass Filter is a wonderful filter designed to bring significantly more "snap" to your images. If a traditional polarizer doesn't give you enough "zip", the "Ultra" polarizer gives you a little more. It will bump up your blue skies even more - making the difference between a good photo and a great image.

The additional warmth that this filter generates comes from the incorporation of Tiffen's exclusive 812 Warming filter.

Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter your camera lens. They can remove unwanted reflections from non-metallic surfaces such as water or glass and also saturate colors providing better contrast.

The effect can be seen through the viewfinder and changed by rotating the filter. The filter factor varies according to how the filter is rotated and its orientation to the sun.

Your deep blue sky will become even "bluer"

A highly efficient design

Adds warmth to image

Made from White Water Glass

Related Questions and Answers

Q: 1. Will using this on an FS7 with full frame lenses negate the crop factor?

A: The Metabones Nikon F-Mount Lens to Sony E-Mount Camera Speed Booster ULTRA, B&H # MESPNFGEBM2, has no effect to crop factor. The Sony PXW-FS7 XDCAM Super 35 Camera System uses a Super 35 CMOS sensor. When comparing the angle of view of a lens used on the Sony PXW-FS7 XDCAM compared to a camera with a full-frame sensor, there is a 1.4x crop factor (technically, 1.392x). As an example, the Nikon AF-S NIKKOR 50mm f/1.4G Lens used on a camera with a Super 35 sensor will have the equivalent angle of view of a 70mm lens used on a full-frame camera.

Q: 2. Please I need to know if this booster will permit me use my sigma lenses for Sony on a Nikon d850 camera?

A: This speed booster is intended to put Nikon lenses on a Sony body, not Sony lenses on a Nikon body.

Q: 3. does this work with Nikon ais lens, such as 105mm f2.5, micro 55mm f2.8..etc..?

A: This adapter does a terrific job doing just about everything possible for being an adapter. It will take your Nikkor lenses and attach them to your Fujifilm X-Mount camera. It will squeeze the image so it better fits the Fujifilm camera's APS-C format. In doing so, it also makes the lens brighter or faster. This lets you shoot in lower light. Now, a couple of things it does not do. It cannot transmit electronic communication between the camera and lens. That means you must manually focus and manually set the aperture on the adapter to get your proper exposure. Other than that stipulation, which you may enjoy actually, you are good to go.

Q: 4. Apologies, I meant Nikon AF lenses. - Mark ? in Canada

A: I see the correction you made but that still is not the correct adapter.This will work on your camera with the Nikon AF lenses, Metabones Nikon G Lens to Sony NEX Camera Lens Mount Adapter (Matte Black) B&H # MENFGEBM1 MFR # MB_NFG-E-BM1.

Q: 5. I have a Sony a6300, will this work with my full frame Nikon lenses including tamron 70-200 2.8 and tamron 15-35 2.8 which are both Nikon f mount as well ?

A: yes as long as you have a nikon F mount lens

Q: 6. What is the difference between the speed booster and the regular adapter?

A: A regular adapter allows you to attach 3rd party lens mount lenses on your camera. The speedbooster lens mount adapter does two magic things: it contracts the image preserving it's full frame angle of view. This very helpful when going to a smaller sensor. It lowers your need for getting wide angle lens. The second amazing magic trick occurs when this concentration of light boosts the brightness of the lens so much, it makes lens faster, brighter, better in low light.

Q: 7. Can this be used with the wider angle Nikon AIS lenses? My 24mm has a piece in the rear that seems to interfere with mounting...

A: Metabones Nikon G to Canon RF-Mount Speed Booster ULTRA 0.71x is compatible with Nikon AIS lenses.

Q: 8. When it says that certain Leica R lenses need to be modified to be used on this, what does that mean?

A: There is a small metal lip that needs to be removed (with a metal saw/file) on the back of some Leica lenses (listed on the Metabones web site), otherwise it will hit the SpeedBooster's glass element. There is a risk of damaging the lens when removing this lip, so I asked a repair shop to do it for me. I don't think the lip has a mechanical function, but it prevents the back element of the lens to be scratched if you lay the lens on a table. So you will have to be extra careful how you handle the lens after you remove the lip.

Q: 9. Will this work with the Loawa probe lens and a Sony A7RIII?

A: Yes, this will fit with the Laowa Probe Lens in the PL mount.

Q: 10. Can I use this with a Sony pxw Fx9 and a ziess cp. 3 Lens (PL Mount) ? Will there be cropping in FF 6K scan mode?

A: Yes, this may be used with the combination you described.