Sigma CAN 35MM دليل المستخدم

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Lens Compatibility with Digital SLR Cameras
CAN 35MM SLR LENSES BE USED ON DIGITAL CAMERAS?
In most cases, the answer is yes. If you have a lens for a fairly recent 35mm SLR camera, it can be used on a
new digital SLR from the same maker. (See the information below under the various camera brands for specific
details about using existing lenses on new cameras.) If the 35mm camera lens produces good, sharp, contrasty
images on film, it will produce good digital photos, too. One big difference is

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The surface of a CCD or CMOS sensor in a camera is shinier than film emulsion, so there can be more light rays reflecting off the sensor, back thru the lens. Digital-only lenses have more extensive coatings on the back sides of the lens elements to absorb this stray light and preserve image contrast. CANON In the late-1980s, Canon introduced the EOS 35mm camera system with autofocus and the latest electronic technology. Canon lenses for EOS cameras are marked EF on the front, such as “EF 28-85mm

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Perhaps the most backward-compatible camera brand, a new Pentax digital SLR camera will accept a lens made for one of the first Pentax K bayonet-mount 35mm cameras back in the mid-1970s. If the lens has auto aperture control (Pentax KA) and autofocus (Pentax KAF) capability, those features will couple to the D-SLRs controls. A Pentax digital SLR will even accept old Pentax screw-mount lenses made for cameras in the 1960s and early ‘70s, provided a Pentax Lens Mount Adapter B is used. Pentax is n