Hoya Sq100 Filter System

Hoya's Sq100 Square Filter System aims to give photographers the means and freedom to fully express their creativity and to realize their artistic goals to the fullest. The system features a sophisticated filter holder kit and a line of high-quality filters, making it a recommendation for advanced and professional photographers in the field of landscape and cityscape photography.

Many advantages to a square system
Adapter rings for various sizes allow the photographer to use the system with a wide range of lenses with all kinds of thread sizes. This makes the square filter system a great long-term investment, as it is not necessary to buy the same filter multiple times for different sizes. As square filters are usually larger than the front glass element of the lens, the chance for vignetting is reduced to a minimum, even when stacking filters. Stacking filters is more effective with a square filter system as it can carry up to three square filters in addition to the polarizer. Switching filters is faster and easier than with stacked round filters. Filter holders can be rotated, giving the photographer the option to reposition the line of graduated ND filters. The line can also be adjusted vertically with a filter holder.

Start with the Holder Kit
The Sq100 Holder Kit includes a holder, a polarizer and two geared adapters that fix the polarizer inside and attach it to the lens. The holder's compact design with a precise slot system can carry two square filters in addition to the polarizer with an optional slot for a third square filter (included in the kit). The body is made of aluminum for optimal durability while being still light in weight. A black gasket on the edge of the inside holder ring as well as a gapless design of the slots minimize light leak. The holder with the attached filters can be rotated, giving the photographer more creative opportunities, such as adjusting the border angle of a graduated ND filter.

Circular polariser filter  
The circular polarizer can be rotated inside the frame for perfect reflection and saturation control. With its large diameter of 86mm, the polarizer filter won't cause any vignetting with most lenses. Hoya's special water repellent multi-coating is applied to the polarizer's optical glass, making cleaning easy and stress-free. For using the polarizer, screw it into the geared adapter and attach the geared adapter to the lens. When attaching the Sq100 holder to a lens with an 86mm filter size, use the 86mm-86mm geared adapter. When using the system with an 82mm filter size lens, use the 86mm-82mm geared adapter. For other lens sizes, use the adapter rings which are available in all common sizes. The polarizer adopts a high transparency polarizing film for fast shutter speed. This translates to no less than nearly 1/2 stop more light entering the lens while yielding the same polarization effect. An absolute must for shooting in low light conditions.

Add HD and CRAFT Sq100 filters
The Sq100 Square Filter system offers the HD series of premium 2mm thick IRND square filters for long exposure shots along with the CRAFT series of other effect filters for creative photography. These filters are made from chemically reinforced clear optical filter glass. IRND nano coating on both sides minimizes any noticeable colour cast. Hoya's ACCU-ND technology ensures a truly neutral colour balance. They also have a water repellent and anti-reflection coating. And are stackable without cast or distortion. There are three Sq100 neutral density filters (all 100x100mm). HD Sq100 IRND8 (0.9) filter reduces light to the equivalent of 3 f-stops, for a motion effect on a bright sunny day, or to reduce the depth of field in very bright settings for a soft bokeh. Middle density HD Sq100 IRND64 (1.8) filter reduces light to the equivalent of 6 f-stops, adding motion blur. HD Sq100 IRND1000 (3.0) filter reduces light to the equivalent of 10 f-stops, for dramatic creative shots based on extremely slow shutter speeds. There are three blender type soft-graduated ND filters for balancing the luminosity of bright areas with dark areas in the image. Both of these are sized 100x150mm, giving the user more possible options for positioning. HD Sq100 IRND8 (0.9) GRAD-S filter gives 0-3 stops light reduction, while HD Sq100 IRND16 (1.2) GRAD-S filter gives 0-4 stops light reduction. The CRAFT Sq100 Starscape Filter (100x100mm) cuts city light pollution for a beautiful night sky.

Other accessories available
Hoya offers a range of adapter rings, starting from 46mm, to use the Sq100 square filter system with various lenses. The Sq100 Pouch 6X is a multi-pouch that carries up to 6 filters for the photographer's convenience.

Explore the Hoya Sq100 square filter system here