Sigma's weather-resistant (WR) ultra-violet (UV) filters prevent the bluish tone that generates when the weather is fine, by absorbing ultraviolet rays. It is effective in most situations, such as landscape, portrait & general photography on a sunny day. It is also an ideal filter for regular use as it is completely colourless so does not affect colour reproduction. With excellent water & oil repellent functions, the filter surface repels water drops & provides resistance to fingerprints. Even if they appear on the surface they can be easily removed. ...

The Sigma 77mm EX DG Circular Polarising Filter reduces the glare & reflections from glass & water & other non-metallic surfaces. It deepens blue skies, & saturates the colours. The Sigma circular PL filter is designed to give best performance with AF Cameras. The Sigma wide multi coated circular polarising filter is very thin, so it does not cause vignetting with wide-angle lenses. You can monitor the changes at different angles through the viewfinder as you rotate this filter. ...

Sigma's EX DG UV filters benefit from a multi-layer lens coating, developed to counteract the highly reflective characteristic of image sensors. With older style filters, light would reflect off the image sensor, bounce off the lens & filter elements & re-enter the image sensor, creating a ghost image. The multi-layer coating dramatically reduces this effect. In addition to this, an optimum, neutral colour balance is ensured, increasing the white balance accuracy of the digital camera. The Multi-Coated DG UV filter perfectly eliminates the harmful effect of ultraviolet light. The multi-coated UV filter can be used with both colour & black-&-white film & digital sensors. Suitable for protective use & general photography. ...

This is a spare or replacement Sigma lens cap for 77mm filter thread lenses. ...

Attachment ring to allow the Sigma EM-140 Macro Ring Flash to be fitted to lenses with a 77mm filter thread. ...

Sigma's weather-resistant (WR) circular polariser (CP) filters remove reflections on the water's surface & glass windows, & increases the contrast in landscape photography. This effect is often used to increase the contrast & saturation in blue skies & white clouds. With excellent water & oil repellent functions, the filter surface repels water drops & provides resistance to fingerprints. Even if they appear on the surface they can be easily removed. ...

The Sigma 77mm Protector WR filter is designed to protect the lens surface from dirt & dust as well as scratches. It is an ideal filter for regular use as it is completely colourless so does not affect colour reproduction. With excellent water & oil repellent functions, the filter surface repels water drops & provides resistance to fingerprints. Even if they appear on the surface they can be easily removed. ...

Sigma's weather-resistant (WR) ultra-violet (UV) filters prevent the bluish tone that generates when the weather is fine, by absorbing ultraviolet rays. It is effective in most situations, such as landscape, portrait & general photography on a sunny day. It is also an ideal filter for regular use as it is completely colourless so does not affect colour reproduction. With excellent water & oil repellent functions, the filter surface repels water drops & provides resistance to fingerprints. Even if they appear on the surface they can be easily removed. ...

The Sigma 8-16mm f 4.5-5.6 DC HSM Lens is an ultra wide zoom lens with a minimum focal length of 8mm, designed specifically for APS-C size image sensors, where it gives focal lengths equivalent to 12-24mm (35mm format) & an angle of view of Approx. 114.5-75.7 degrees. The Sigma 8-16mm features 4 low dispersion glass elements to compensate for colour aberration, while one hybrid aspherical lens & two glass mould elements give excellent correction for distortion & astigmatism. The Super Multi-Layer Coating reduces flare & ghosting while superior peripheral brightness ensures high contrast images throughout the entire zoom range. The Sigma 8-16mm f 4.5-5.6 DC HSM Lens incorporates an inner-focussing system & a Hyper Sonic Motor, ensuring quiet & high speed AF as well as full-time manual focus capability. With a minimum focusing distance of 24cm throughout the entire zoom range the 8-16mm lens allows the photographer to emphasise the subject by creating exaggerated perspectives. ...

The Sigma 8-16mm f 4.5-5.6 DC HSM Lens is an ultra wide zoom lens with a minimum focal length of 8mm, designed specifically for APS-C size image sensors, where it gives focal lengths equivalent to 12-24mm (35mm format) & an angle of view of Approx. 114.5- 75.7 degrees. The Sigma 8-16mm features 4 low dispersion glass elements to compensate for colour aberration, while one hybrid aspherical lens & two glass mould elements give excellent correction for distortion & astigmatism. The Super Multi-Layer Coating reduces flare & ghosting while superior peripheral brightness ensures high contrast images throughout the entire zoom range. The Sigma 8-16mm f 4.5-5.6 DC HSM Lens incorporates an inner-focussing system & a Hyper Sonic Motor, ensuring quiet & high speed AF as well as full-time manual focus capability. With a minimum focusing distance of 24cm throughout entire zoom range the 8-16mm lens allows the photographer to emphasise the subject by creating exaggerated perspectives. ...