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This offers greater flexibility, speed and creative control when composing a shot - especially when mounted on a tripod.Īdditionally, the Sigma’s “35mm equivalent” focal length range of 27-53mm is standard and well-suited for most video work. You may zoom in-and-out without physically moving your camera setup. Unlike a prime lens with a single focal length, the Sigma is variable. This mistake has been corrected.) Variable focal lengths (Note - an earlier version of this review incorrectly assumed f/1.8 on this lens was equal to f/1.8 full frame. This makes the low-light performance of the Sigma similar to Canon’s excellent 24-70mm f/2.8 for less money. In terms of light gathering capabilities, the f/1.8 aperture is roughly equivalent to f/2.8 on a full frame lens. This translates into a brighter image and less noise when used wide open. The Sigma-35mm has a large, maximum aperture of f/1.8. Sigma 18-35mm f/1.8 for videoĭespite its limitations when shooting stills, the Sigma 18-35mm f/1.8 is surprisingly great for video on the R5. But for me, 18 megapixels is a big drop in resolution, so I would not use the Sigma 18-35mm f/1.8 for my own still photography. That’s more convenient than how the Canon 5D Mark IV functions, but the net result is still a low resolution image (18 megapixels instead of 45, the native resolution of the R5 sensor).įor wildlife photographers who need additional reach, or photographers who only publish images online, 18 megapixels may be enough. The R5 is effectively cropping the image for you. Sigma 18-35mm f/1.8 on the Canon EOS R5 (1.6x Crop Aspect Ratio) The net result is an optically-zoomed, clean image without any vignette (see below). APS-C lenses automatically enable “1.6x (crop)”. The R5 recognizes the Sigma 18-35mm’s crop factor and automatically changes its Cropping/Aspect Ratio setting to “1.6x (crop)”. The Canon EOS R5 is, however, smarter than the 5D. Sigma 18-35mm f/1.8 on the Canon 5D Mark IV Once cropped in post, the image then has the same field of view as a 27-53mm full-frame lens. Images contain massive amounts of vignette. On older DSLRs like the full-frame Canon 5D Mark IV, you can see what’s happening (see below). This translates to an effective 27-53mm focal length range on full-frame cameras. To find the full-frame, “35mm equivalency” of the APS-C Sigma 18-35mm, you multiply its focal length by crop factor (which is 1.6 for Canon cameras). SIGMA 18-35MM - FIND USED ON EBAY Sigma 18-35mm f/1.8 for photography
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