Sigma 210101 18-35mm F1.8 DC HSM Lens for Canon - Black

Product Information

Attach the Sigma (or any APS-C lens) to the R5, and the camera automatically enables Movie Cropping. This is effectively doing for video the same thing as the aforementioned Aspect Ratio by applying a 1.6x crop. Canon EOS R5 Movie Cropping automatically set to “Enable” with Sigma 18-35mm attached Is this worth getting on the 7100? Need a general zoom lens for my 7100 before I get some of the single focal prime lens. Because it actually is a true 18-35mm focal length. The field of view is different on FF and APS-C but the focal length stays the same. The sigma just doesn't cover the image circle required for FF. does this lens works with the sony a6000, with autofocus and all the other features? or does it needs an adaptator for the a6000?

Sigma 210306 18-35mm F1.8 DC HSM Lens for Nikon - Black Sigma 210306 18-35mm F1.8 DC HSM Lens for Nikon - Black

The pictures below illustrate the focal length range from wide to telephoto (on Canon APS-C, 1.6x). The 18-35mm covers a modest 2x zoom range. In this set of evaluations, we’ve compared the Sigma zoom with the highest performing full-frame primes of the same focal lengths – 18mm, 24mm and 35mm. While it might seem a little unusual, the lenses (all high speed models) reflect the state of the art in that format and when mounted on an APS-C DSLR offer the same angle of view (at each focal length) as the Sigma. With a minimum focusing distance of 28cm and a maximum magnification ratio of 1:4.3, this lens is excellent for close-up photography.The Sigma can focus down to around 12cm in front of the lens - making the 18-35mm a pretty flexible all-round lens. Photo by Barnaby Britton Because an f1.8 APCS lens on an APSC sensor DOES gather the same total amount light as a f2.8 FF lens on a full frame. The APSC lens focuses all that light on a smaller circle, the FF lens focuses it on a larger one. But they both gather about the same number of photons in the same time. This would give a 13-25mm F1.3, which, when mounted on a Four Thirds sensor would be equivalent to a 26-50mm F2.56 lens on full frame.

Used Sigma 18-35mm f/1.8 DC HSM ART - Canon EF-S Fit - MPB

But because the R5 can shoot 8K video, Movie Cropping applies a 1.6x crop to an 8K image. This creates a 5.1K image, which is then downsampled to 4K. This is what Canon calls “4K Crop” video. ISO in the digital era (in an attempt to mimic ISO, DIN and ASA from the film era), is a per-unit-area perspective. But if you view the output images at the same size, then a per-image perspective is also pertinent.Despite its limitations when shooting stills, the Sigma 18-35mm f/1.8 is surprisingly great for video on the R5. Here’s why. Large f/1.8 aperture Sigma has a long history as a lens maker, having been founded over 50 years ago. In the film era it was best known for relatively inexpensive lenses that undercut the camera makers' own equivalents in terms of price. But this has changed over the part decade or so; while other companies have shifted manufacturing to cheaper locations such as China and Thailand, Sigma has stubbornly refused to move from its factory in Aizu, Japan. This means it can no longer compete in the same way on price alone, and it's therefore switched its focus towards higher-value offerings. Oversampling 5.1K to 4K is apparently less taxing on the camera than 8K to 4K, so the R5 does not heat up or require periodic cool downs as it does when shooting “4K HQ” video. The only limitation with “4K Crop” then is the R5’s 30 minute record time limit, which is standard in all their non-cinema cameras. Downsides of the Sigma 18-35mm f/1.8 The 18-35mm is remarkably sharp even wide open at F1.8, and in the wider half of its range (18-24mm), there's no measurable increase on stopping down (i.e. the lens is effectively diffraction limited). At the longer end (28-35mm) there's a slight improvement in sharpness on stopping down to F4, but in practice it's unlikely to be especially noticeable. For an F1.8 zoom, this is little short of astonishing. The HSM (Hyper Sonic Motor) ensures a silent, high-speed AF function. Optimizing AF algorithm, smoother AF is achieved. It also enables full-time manual focusing capability which allows sensible focus adjustment by simply rotating the focus ring.