![]() ![]() Zoom lenses converted this way will become vari-focals by losing the focus setting as they are zoomed. Prime (as opposed to zoom) lenses often permit a simple resetting of the position of the focusing ring on helical inside. of decopperized FR3 1.5mm circuit board) can be added between the K-mount lens body and its bayonet plate. Such lenses will then focus beyond infinity and may contact the protective filter. Pentax K-mount lenses physically fit, but should only be mounted when the rear protrusions have been dismantled. This provides a not so obvious but very interesting option that most Canon EF-mount lenses will work seamlessly after exchanging the mount plate with the Sigma DSLRs, but without image stabilization. The Sigma SA lens protocol is a clone of the Canon EF protocol. Physically, the SA mount is identical to the PK mount with a reduced back-focus of 44.0mm (equals Canon EOS) as opposed to the 45.5mm of Pentax PK and M42. The camera uses the SA mount, for which only Sigma itself manufactures lenses. Another unusual feature is the fact that the infrared filter is fitted to the lens mount rather than the sensor and doubles as a dust protector, sealing the mirror and sensor compartment, and can be removed easily, to allow infrared photography. Unlike most consumer cameras, which use color sensors based on a Bayer color array, the SD14 uses a Foveon X3 sensor. Sigma has released sample images on their website. After production delays, Sigma announced the official release of the SD14 to be on March 6, 2007. The camera was announced on Augwith a "teaser" advertising campaign and was unveiled at the photokina trade show in Cologne, Germany on. It is fitted with a Sigma SA mount which takes Sigma SA lenses. The Sigma SD14 is a digital single-lens reflex camera produced by the Sigma Corporation of Japan. Optical, pentaprism, 98%x98%, 0.9x with 50mm lens at infinity. Programmed, shutter-priority, aperture priority, manualģ0 s to 1/4000 s, 2 min to 1/4000 s in extended mode 2652 × 1768 × 3 (14.1 million effective pixels, 4.69 megapixel output image size)ĬompactFlash(CF) (Type I or Type II) and MicroDrive(MD)
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |