The 37mm Urth Plus+ Magnetic UV & Polarizer Filter 37mmincludes the professional UV Lens Filter Plus+, which cuts 99.6% of ultraviolet light to sharpen your photos and protects your lens from scratches, oil, dirt, fingerprints, and salt water. It also includes the professional CPL Lens Filter Plus+, which cuts 99.9% of reflected light for better contrast and stronger color saturation. The Plus+ range features 20 layers of nano coating providing easier cleaning and better protection against water, oil, and scratches. These layers also provide a higher maximum light transmission and a more consistent transmission curve for sharper images, finer colors, and greater depth. The magnetic filter kits include a magnetic adapter ring.

Minimalist Kit with 2 Essential Filters    20-Layer Nano-Coating    Ultra-Slim Magnalium Rim    B270 Schott Optical Glass

The UV Plus+ cuts ultraviolet haze and the CPL Plus+ reduces polarized light for better clarity, contrast, and stronger colors.

Both crafted with German Schott glass, the UV filter features a 30-layer nano coating and the CPL has a 20-layer nano coating.

The UV Filter Plus+ protects your lens and sharpens your photos, and the CPL Polarizing Filter Plus+ reduces glare and boosts colors and contrast.

The design minimizes space and weight in your kit, speeding up your workflow with a convenient stackable, magnetic system. Magnetic filter kits include a magnetic adapter ring.

Related Questions and Answers

Q: 1. What is the proper technique for attaching the filter to the filter threads on the front of the lens? The filter is very thin, with very little to grip, but is further rendered difficult to screw on by the presence of the rotating section of the filter. Basically you can only hold the rotating part so it is tough to get the threaded portion to turn and screw into the threads on the lens. The rotating part just rotates so you can barely get any torque on the threaded portion. I finally got mine to screw in by pushing firmly toward the lens as I turned the filter. I don't want to damage anything. When using this technique the threaded portion turns slowly because it drags more on the lens threads.

A: Since submitting this question, I had a chance to look closely at the filter with my OptiVisor. It seems there is a very thin knurled ring on the threaded part of the filter just below the rotating part. I will have to practice and see if I can master threading it to the lens without cross threading or otherwise damaging anything. I do have a filter wrench, but the threads are so fine and delicate that it is even more difficult to tell if you are crossthreading. That will take some practice, too. The lens filter threads are inside a metal ring of sorts that prevents full sized fingers from being able to grip that knurled surface enough to be able to turn the ring to thread it in.

Q: 2. Will this filter Vignette image corners on a full frame camera with Canon EF 17-40 f4 L lens?I don't see the thickness in the specs, will 5mm work at 17mm? Thanks.

A: There is a possibility that this filter will vignette on the 17-40mmf/4 L lens. As an alternative, you may want to consider this item, B&H# HOCPSMC77, http://bhpho.to/1f9telF.

Q: 3. does this filter fit Panasonic DMCFZ300K LUMIX FZ300 4K 24X F2.8?

A: According to the filter thread size in the spec list, yes this filter will fit as the camera takes 52mm filters.

Q: 4. Does Hoya manufacture this Circular Polarizer in a 95mm filter size?

A: Not currently, but they do have a 95mm Circular Polarizer Filter. Hoya 95mm Circular Polarizer Filter (BH #HOCP95 • MFR #B-95CRPL-GB)

Q: 5. Will i be able to use this filter with my Canon EF 16-35mm F/4L IS USM ultra wide angle lens and will my auto focus still work with it? Sorry but I'm a true amateur. Thanks

A: If your lens takes a 77m yes you can use this filter and you should not get any issue with the AF using a CPL with a wide angle lens. I have read that you get autofocus and underexpose issues when you use a linear polariser. However I haven't experienced this since i don't use linear polarisers.

Q: 6. What is the difference between the NXT and the NXT PLUS filter?

A: The plus it multicoated to reduce ghosting and flares and it has top knurling to provide a more textured grip when mounting or removing it from a lens.

Q: 7. Please can someone tell me what NXT stands for in Hoya NXT polarizer filters?Thanks for tour kind attention, regardsYves T

A: It does not have any actual meaning. It is simply the designation for the next series of filters that can only be found in the US.

Q: 8. Is this fully compatible with the Acute 2R 1200 power pack?

A: No, the following heads are designed for the following models. Profoto D4 Air Profoto Pro 8a Profoto Pro B3 Profoto Pro B4 Profoto Pro-10 Profoto Pro-11

Q: 9. This filters works in 16-50 samsung nx500 lenses?

A: Yes, these filters will fit the 16-50mm.

Q: 10. Does this filter rotate?

A: Yes, the circular polarizer rotates. it enable you to add contrast to colors outdoors, and remove the majority of unwanted reflections form non-metallic surfaces such as water or windows. Keep in mind that if you have a powerful light source 9such as the sun) in the frame, it will eliminate any polarization effects.