Breakthrough Photography - 49mm X4 Circular Polarizer Filter

Introducing the world's most advanced circular polarizer The moment you use the X4 CPL, you know you've never used anything like it. Featuring Breakthrough Photography all-new American made CPL film and an all-new brass traction frame features best-in-class design and durability. And that's just the beginning. Technology World's most color neutral CPL. Guaranteed Breakthrough Photography all-new and internally developed CPL film is at the core of the X4 CPL and they manufacture it right here in California. To achieve the worlds most color neutral performance, they had to develop a unique approach to manufacturing rather than selecting off-the-shelf CPL film common among filter manufacturers, which is designed and intended for LCD panels, not photographic optics. All commercially available CPL filters exhibit a yellow cast due to a gradual transmission increase starting around 600nm and then spiking at 650nm onward into IR. With Breakthrough Photography X4 CPL film they achieved a gradual transmission decrease from 600nm onward and instead of spiking uncontrollably near 650nm and far into infrared, the X4 CPL sees very controlled transmission into IR, without the curve spike. The real world result Warm and lively images without the apparent color cast. Transmission Curve Spectrometers are optical instruments that can detect spectral lines and measure their wavelength or intensity. Spectrometers can also be used to test the efficiency of an optical filter in order to evaluate color neutral performance. A perfectly flat transmission curve would yield a perfectly color neutral result and while there is no such thing as a perfectly neutral CPL filter (contrary to what other filter makers may claim) the X4 CPL is the most color neutral any CPL filter, guaranteed. When filter makers use off-the-shelf polarizing films originally designed for LCD panels, it produces a predictable transmission increase at 650nm onward and a spike in transmission around around 680nm and into IR. During Breakthrough Photography research into alternative manufacturing methods, they were able to solve this problem. As a result the X4 CPL sees a decline in IR transmission across the visible spectrum and is very well controlled throughout the IR range. Dynamic Range Expand your dynamic range in-camera Outdoor photographers frequently struggle with dynamic range, as the human eye has a dynamic range over 20-stops, while a mid-day outdoor scene (like the one below) may range between 15-18 stops. Professional camera systems range between 12-14 stops and during the last decade very little expansion progress has been made. You can sometimes recover detail in shadows if there's enough data there in post-processing, but you can't remove glare in post-processing and the removal of glare adds vibrancy, contrast and reveals details that are otherwise unseen. When you rotate a circular polarizer you will see it turn ON and OFF through the viewfinder, allowing you to control the amount of polarization necessary for your shooting situation. The higher in elevation you shoot, the more pronounced the polarization and the more dynamic range is increased as a result. Design A winning design proven by outdoor photographers Breakthrough Photography took all they learned from the success of the X3 ND and designed an entirely new circular polarizing frame, unlike you've ever seen before. And like the X3 ND, they specifically designed the X4 CPL as a workhorse CPL for field work, built to withstand extreme wind, salt water, dust and other abrasive conditions and elements where other filters may fail. And Breakthrough Photography guarantee each and every X4 CPL to perform with optimal optical clarity and color neutrality for 25 years even in the harshest of conditions. Weather-sealed Breakthrough Photography specifically designed X4 CPL as a workhorse circular polarizer for field work, built to withstand extreme wind, salt water, dust and other abrasive conditions and elements. Nano Coatings X4 CPL incorporates their state-of-the-art nanotec Nano Coatings Technology, which beads water and other elements rather than absorbing and smearing. 25 Year Support Breakthrough Photography stand behind each X4 CPL filter with their 25 Year Ironclad Guarantee with US-based phone, email and live chat support. World's sharpest CPL filter. Guaranteed The X4 CPL features SCHOTT Superwhite B270 optical glass, which is an ultra clear crown glass.

Sunpak’s line of filters help improve every imaging opportunity by improving image impact and quality. The Sunpak 49mm filter is meticulously crafted from the high-quality, multi-coated optical glass optimized for today’s cameras. And they are backed by a one-year warranty against defects in material and workmanship. Sunpak Digital Filters (UV) Ultraviolet/lens protection produces sharper, more vivid images and protects lens from scratches and dirt. This commonly used filter also reduces the effects of ultraviolet light and atmospheric dust and haze so that you can get improved contrast and color saturation from sunny landscapes, including mountain, marine and aerial scenes. Also used as a protection filter to keep the front lens element clean from dust, dirt, fingerprints and damage. The durable low-profile aluminum-magnesium alloy filter ring construction is ideal for wide-angle lenses and telephoto lenses.

Radiant white clouds against a deep blue sky or the deep colors of fall foliage don't happen by chance. B+W polarizing filters (polarizers for short) augment the purity of the intrinsic colors and increase color saturation and are among the most important filters for analog and digital photography.Because the filter mounts rotate, the polarization effect can be visibly controlled in the viewfinder or on the monitor display. Another effect of the B+W polarizer is to reduce reflections from non-metallic surfaces such as water, glass, and glossy paint. Objects and people behind surfaces such as shop windows and car windshields become visible again - a fascinating image enhancement without image processing! B+W polarizing filters are circular polarizers which are compatible with nearly all modern cameras when beam splitters are used in the light path for TTL exposure metering or autofocus. Exposure errors are therefore avoided. The multiplying factor with HTC is 2 to 3, which is equivalent to 1 to 1.5 f-stops. Other polarizers up to approx. 3 stops. Often regarded as the most important filter for photography.TipThe maximum polarization effect is achieved in landscape photography when shooting at an angle of 90 Degree to the sun. For an even effect in the picture, and because of uneven skylight polarization, your focal length should not be less than 28 mm in 35 mm format.Generally speaking, with the help of a properly oriented polarizer, reflections can be completely suppressed in an ideal situation. Here, the ideal situation means that the lighting and shooting angles are almost the same and correspond to the angle of maximum polarization, usually 30 Degree to 40 Degree .