I have just purchased one of your DC lenses but I am getting a black line around the edge of my pictures. Is the lens faulty?SIGMA’s DC lenses are designed to work on digital SLR cameras with an image sensor which is smaller than 35mm film (known as APS-C size). If you use one of these lenses on a film or full frame digital SLR, you will get a line (called vignetting) around the edge of the picture. Please use a lens from our DG range as these will be suitable.
Can you send me a printed brochure?
Where are SIGMA made?
Quality is important to us and we want full control of the entire production, which is why all our products are manufactured at our own factories in Japan. This is very unusual these days, as most companies have at least some of their products produced outside Japan due to cost considerations.
I would like to use a filter on my 15mm fisheye lens but I can only use a gelatine filter, why is this and where can I buy them?Due to the ultra wide angle shooting capabilities of lenses such as the 15mm, front filter use simply is not possible. It would damage the front element of the lens and cause heavy vignetting on the images.