Dorr DHG Neutral Density ND3.0 1000x Filter 72mm Burgundy The Sigma USB Dock allows

The Sigma USB Dock allows you to connect your Canon fit Sigma lenses to a computer in order to fine-tune and adjust parameters on their lens to suit their own preference

requiring just 1

Olympus PEN E-PL5

Increases the aperture by 1 stop

Dorr DHG Neutral Density ND3.0 1000x Filter 72mm Burgundy The Sigma USB Dock allowsThe ND3. 0 1000x filter extends the exposure time by factor 1000, which corresponds, to 10 f stops. Example: an exposure time of 1 1000s can change to 1s using the ND3. 0 1000x neutral density filter. As an effect of longer exposure time, you can for example "eliminate" people moving on squares or landscapes. Available in filter sizes 37mm, 40. 5mm, 43mm, 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm and 82mm.