Canon 's RF 14-35mm F4 L IS USM is advertised as a more affordable and lighter alternative to the flagship wide-angle zoom lens RF 15-35mm F2.8 for RF mounting. We have been shooting with it for a few days, and so far we have a very good impression of this compact ultra-wide camera.
RF 14-35mm F4 provides the widest focal length range among current Canon zoom lenses. In terms of maximum field of view, it even surpasses our high-end counterparts, the more expensive 15-35mm f2.8. 14mm The difference between 15mm and 15mm is not big, but there is still a difference. For photographers who don’t need the extra photoresist provided by 15-35mm, we suspect that the lighter and more compact 14-35mm will prove very charming.
RF 15-35mm weight reduction is considerable. The weight of the RF 14-35mm is 540 grams (1.2 lbs) and the weight is 840 grams (1.85 lbs). Although nominally it has a similar optical structure, it includes 16 elements in 12 groups (including three UD elements and three aspheric elements-one more aspheric element than 15-35mm).
Unsurprisingly, Canon engineers prefer digital correction in the design of this lens, especially to control the distortion under the wide-angle setting (distortion correction is mandatory in the camera and cannot be turned off). The theoretical trade-off of this method is that compared to the design of optical distortion correction, may lose corner sharpness; however, it is not that simple in practice. No optical distortion correction can provide freedom of optical design, such as correcting other aberrations or optimizing certain aspects of image quality. In fact, it is not uncommon for lenses that rely on digital distortion correction to outperform similar lenses that require less correction afterwards in terms of corner sharpness.
At the same time, compared to 14 mm and wider lenses designed for DSLR, the physical advantage of mandatory digital correction in this mirrorless lens design is its small size and light weight (and support for traditional screw-in filters). mirror).
Although lighter and cheaper than 15-35mm, the dust and moisture resistance of 14-35mm F4 is the same as other L-line lenses in the RF range. In this picture, you may only see the rubber gasket that seals the lens/camera interface.
RF 14-35mm F2.8L IS USM is a bit unusual for an ultra-wide-angle lens. It has an optical image stabilization function that can effectively reach 5.5 stops (according to CIPA). When paired with cameras with sensor-based stabilization (currently EOS R5 and R6), the stabilization effect will be increased to the rated 7 gears. Although the wider angle of view allows longer unstable exposures anyway, the option of handheld exposure up to 1/2 or even a full second at the widest angle setting of the lens is very useful for fans of low-light or long-exposure photography. Attractive (and convenient when a tripod is not practical).
Autofocus is processed by Nano USM focus motor. According to our experience using this lens on EOS R5 and R6 bodies, it is almost instantaneous and almost silent when shooting still images, and it is very Smooth. If necessary, the “by-wire focus” manual focus ring can be used for manual control. The front of the lens barrel is a control ring, which is very common in Canon RF series now. This can be customized to achieve various functions, including exposure compensation or manual aperture control.
At all focal lengths, the minimum focal length is approximately 20 cm (~8 inches), and the (impressive) maximum magnification of 0.38 times is achieved at 35 mm settings. Although 14mm provides a very wide angle, 14-35mm has a traditional threaded filter ring,The 77mm filter can be accommodated without an adapter.
provides a slender hood to help reduce the risk of glare from off-axis light sources. The hood can be flipped and stored. Without the hood, the RF 14-35mm is less than 4 inches in length, making it a truly compact choice, just like the EOS RP and R5 or R6 at home. At a suggested retail price of $1699, it is not completely "cheap", but it saves $600 compared to the faster and larger 15-35mm F2.8.
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