This Kase K9 100x150mm Master Filter Holder Kit contains a Kase K9 100mm Filter Holder, a Kase 100 x 150mm Wolverine Solid Neutral Density 1.8 Filter, a Kase 100 x 150mm Wolverine Solid Neutral Density 3.0 Filter, a Kase 100 x 150mm Wolverine Soft-Edge Graduated ND 1.2 Filter, a Kase 100 x 150mm Wolverine Soft-Edge Graduated ND 0.9 Filter, a Kase 100 x 150mm Wolverine Reverse-Graduated ND 0.9 Filter, as well as a Kase 90mm Magnetic Circular Polarizer Filter that is designed to avoid vignetting when used with a wide-angle lens. The neutral density filters can be used individually or in combination to improve the results of your photography by preventing overexposure, along with the circular polarizer which serves to prevent distracting reflections or glare.

Utilizing a modular filter slot system, the filter holder allows for the convenient use of up to three, 100mm-wide, 2mm-thick filters such as the included Kase Wolverine neutral density filters, along with the included circular polarizer. The slot system can also be reconfigured so that the kit's filter holder accommodates up to three separately available 100mm-wide, 1.1mm-thick filters along with the circular polarizer filter. While in use, the circular polarizer filter magnetically fits within the filter holder system so that it can be quickly installed, removed, or switched with a different Kase 90mm magnetic filter depending on the subject or changing lighting conditions.

Constructed for durability while remaining lightweight, use of the K9 100mm Master Filter Holder Kit is easily accomplished by first screwing one of its included 77 or 82mm adapter rings onto a lens or step-up ring with corresponding front filter threads. A 67-82mm step-up ring as well as a 72-82mm step-up ring for use with the 82mm adapter ring are also included for lenses with 67mm or 72mm front filter threads, respectively. After being fitted onto an adapter ring, the filter holder's locking knob helps to provide a reliable, yet adjustable connection that allows the holder to be rotated 360°, which benefits the use of graduated neutral density or other filters that are enhanced by varied positioning. The included circular polarizer filter can then be placed within the filter holder assembly, followed by 100mm-wide filters that are either 2mm or 1.1mm-thick.

The adapter rings accommodate the magnetic circular polarizer within the filter holder system. When combined with both the adapter ring and filter holder, the circular polarizer filter can be rotated to adjust its effect. An external dial on the filter holder integrates with the polarizer's geared filter ring, allowing for the independent rotation of the circular polarizer filter in order to adjust the intensity of the polarization effect. Two pairs of screw-in guide blocks are included. When installed, one guide block pair creates three slots for 100mm-wide, 2mm-thick filters while the other guide block pair creates three slots for 100mm-wide, 1.1mm-thick filters.

The Kase 100 x 150mm Wolverine Solid Neutral Density 1.8 and 3.0 Filters provide a respective 6 and 10-stop exposure reduction. Their 1.8 and 3.0 densities creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By increasing your aperture or slowing your exposure time, you can control depth of field and convey movement more easily. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters.

The Kase 100 x 150mm Wolverine Soft-Edge Graduated ND 0.9 and 1.2 Filters both help to darken specific areas of an image, such as bright skies, while allowing for a normal, unaffected exposure in the other regions of the image. Each of these filters are densest at the edge and taper to clear by the middle, with a soft-edged line of transition between the dense and clear areas. Neutral density filters with a soft-edged line of transition are able to filter the sky while minimizing their effect on the land. They are particularly useful where the transition between sky and foreground is indeterminate, such as images featuring mist, fog, or the tops of trees. Neutral density filters do not affect the coloration of the image and these respective filters provide up to a 3 and 4-stop reduction in light from entering a lens.

The Kase 100 x 150mm Wolverine Reverse-Graduated ND 0.9 Filter can be applied to darken bright skies, specifically during a sunrise or sunset, while allowing for a normal, unaffected exposure in the other regions of the image. This filter achieves its effect with a 0.9 band of density above its center region that provides up to a 3-stop reduction in light from entering a lens. The band extends in both vertical directions and tapers to approximately a 0.3 density and a 1-stop reduction in light at the edge above it. Directly below the 0.9 band of density, it tapers to clear, with a hard-edged line of transition before the clear area.

The placement of a 0.9 band of density with a clear area directly below allows the 100 x 150mm Wolverine Reverse-Graduated ND 0.9 Filter to match the positioning of the sun when it is at, or immediately above, the horizon. In such instances, the sun can appear closer to the center of an image as opposed to the upper edge, and an increase in brightness is created that is more prominent on both sides of the sun than above it. This pattern of brightness corresponds to the density pattern on the 100 x 150mm Wolverine Reverse-Graduated ND 0.9 Filter. The hard-edged line of transition in this reverse-graduated neutral density filter is useful for hard transitions between the sky and land, while the 3-stop to approximately 1-stop gradation is applicable to multiple regions of brightness within the sky.

Kase Wolverine filters are constructed from tempered, optical glass for shock resistance. To prevent internal ghosting and reflections, while further enhancing clarity and color fidelity, each glass surface includes multiple layers of anti-reflection coatings. These coatings also offer greater protection to the filter substrate and help it to stay clean for longer than with uncoated filters.

To store and transport the Kase K9 100mm Master Filter Holder Kit, a rigid, leatherette pouch is provided. It features a secure, buckle closure as well as a shoulder strap that can be used to keep its contents within immediate reach.

Kase K9 100mm Filter Holder Filter Holder, Adapter Rings, and Step-Up Rings

• Durable, lightweight filter holder allows for the convenient use of up to three separately available 100mm wide filters that are either 2mm or 1.1mm thick and an included Kase 90mm Magnetic Circular Polarizer Filter
• One pair of included screw-on guide blocks creates three slots for 100mm wide, 2mm thick filters while another pair of included screw-on guide blocks creates three slots for 100mm wide, 1.1mm thick filters
• Use of the filter holder can be easily accomplished by first screwing an included 77 or 82mm filter holder adapter ring onto a lens or step-up ring with corresponding front filter threads
• A 67-82mm step-up ring as well as a 72-82mm step-up ring for use with the 82mm adapter ring are also included for lenses with 67mm or 72mm front filter threads, respectively
• Filter holder locking knob helps to provide a reliable, yet adjustable connection that allows the filter holder to be rotated 360°, allowing the use of graduated neutral density and other filters that are enhanced by varied positioning

Kase 90mm Magnetic Circular Polarizer Filter

• Circular polarizer filter magnetically fits within the filter holder system and can be quickly installed, removed, or switched with a different Kase 90mm magnetic filter depending on the subject or changing lighting conditions
• Polarizer filters help to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface, clears up haze in distant landscapes, and provides more saturated, vivid colors
• Does not disrupt auto exposure or focus features, is constructed from Schott B270 Superwhite glass for enhanced clarity and color fidelity
• Multi-coated to prevent internal ghosting and reflections and features scratch-resistant, mold-resistant, and hydrophobic coatings on each glass surface to protect the filter substrate and result in an improved beading effect when in contact with water or oil for greater cleaning efficiency
• 2x filter factor reduces exposure by 1 stop
• Designed to avoid vignetting when used with a wide-angle lens and can be independently rotated to adjust the intensity of the polarization effect

Kase 100 x 150mm Wolverine Solid Neutral Density 1.8 and 3.0 Filters (6 and 10-Stop)

• Compatible with a Kase 100mm Filter Holder or other filter holders that can accommodate 100mm wide, 2mm thick filters
• 1.8 and 3.0 neutral density filters darken the entire image, allowing you to photograph with a longer shutter speed or wider aperture than normally required
• Providing a respective 6 and 10-stop exposure reduction, these filters allow you to control depth of field and convey movement more easily
• Filters do not affect the overall coloration of the image
• Attenuates infrared light to maintain color neutrality and suppress color casts due to increased exposure times
• Tempered, optical glass construction for shock resistance
• Multi-coated to prevent internal ghosting and reflections
• Scratch-resistant, mold-resistant, and hydrophobic coatings on each filters' glass surfaces protect the filters' substrates and result in an improved beading effect when in contact with water or oil for greater cleaning efficiency

Kase 100 x 150mm Wolverine Soft-Edge Graduated ND 0.9 and 1.2 Filters (3 and 4-Stop)

• Compatible with a Kase 100mm Filter Holder or other filter holders that can accommodate 100mm wide, 2mm thick filters
• Darkens bright areas of an image, such as skies, while leaving the remainder of the frame unaffected
• Provides up to a respective 3 and 4-stop reduction of light in selective areas
• Soft-edged lines of transition between the filters' dense and clear areas
• Useful for images where the transition between sky and foreground is indeterminate, such as images featuring mist, fog, or the tops of trees
• Filters do not affect the overall coloration of the image
• Attenuates infrared light to maintain color neutrality and suppress color casts due to increased exposure times
• Tempered, optical glass construction for shock resistance
• Multi-coated to prevent internal ghosting and reflections
• Scratch-resistant, mold-resistant, and hydrophobic coatings on each filters' glass surfaces protect the filters' substrates and result in an improved beading effect when in contact with water or oil for greater cleaning efficiency

Kase 100 x 150mm Wolverine Reverse-Graduated ND 0.9 Filter (3-Stop)

• Compatible with a Kase 100 x 150mm Filter Holder or other filter holders that can accommodate 100mm wide, 2mm thick filters
• Effectively darkens bright skies, specifically during a sunrise or sunset, while allowing for a normal, unaffected exposure in the other regions of the image
• 3-stop band of density that tapers to approximately a 1-stop density at the edge above it, while directly above a clear area
• Creates a neutral density pattern that matches the positioning of the sun when it is at, or immediately above, the horizon
• Density pattern corresponds to the brightness pattern of the sun when it appears at or is closer to the horizon as opposed to a higher angle, which creates an increase in brightness that is more prominent on both sides of the sun than above it
• Hard-edged line of transition between the 3-stop band of density and the clear area below it is useful for hard transitions between the sky and land
• 3-stop to approximately 1-stop gradation is applicable to multiple regions of brightness within the sky
• Filter does not affect the overall coloration of the image
• Attenuates infrared light to maintain color neutrality and suppress color casts due to increased exposure times
• Tempered, optical glass construction for shock resistance
• Multi-coated to prevent internal ghosting and reflections
• Scratch-resistant, mold-resistant, and hydrophobic coatings on each glass surface protect the filter substrate and result in an improved beading effect when in contact with water or oil for greater cleaning efficiency

Content List:

1 x Kase K9 100mm Entry-Level Filter Holder Kit

1 x Kase K9 100mm Filter Holder Kit

1 x Kase 90mm Magnetic Circular Polarizer Filter

1 x Kase 100 x 150mm Wolverine Solid Neutral Density 1.8 Filter (6-Stop)

1 x Kase 100 x 150mm Wolverine Solid Neutral Density 3.0 Filter (10-Stop)

1 x Kase 100 x 150mm Wolverine Soft-Edge Graduated ND 0.9 Filter (3-Stop)

1 x Kase 100 x 150mm Wolverine Soft-Edge Graduated ND 1.2 Filter (4-Stop)

1 x Kase 100 x 150mm Wolverine Reverse-Graduated ND 0.9 Filter (3-Stop)

1 x Storage Pouch