The field of view is now much closer to still photo mode. The Canon EOS R has about a 1.75x crop factor, and the EOS RP has a 1.64x crop factor (similar to APS-C). This is larger than cropped image circle of EOS-R (26.9mm) and than 4K video image circle on EOS-R (23.6mm). Even if lenses will cover this extended image circle without vignetting, you have expect bad resolution/blur at the edge of the frame. The field of view is now much closer to still photo mode. They'd have to cover 39mm instead of 36mm horizontal sensor size when speedboosted. HarryFilm; Dec 1, 2020; Lenses Replies 14 Views 5K. This adapter does not support the Canon R5 or R6. Filmmakers are now able to mitigate most of the 4k video crop factor of EOS R (1.75x) and EOS RP (1.63x) and reduce it to 1.24x and 1.15x respectively. Filmmakers are now able to mitigate most of the 4k video crop factor of EOS R (1.75x) and EOS RP (1.63x) and reduce it to 1.24x and 1.15x respectively. The Speed Booster will cover the entire sensor, but most lenses (particularly zooms and wide-angle blenses) won't. Canon has announced a new EF to RF 0.71x speed booster adapter. The Metabones Canon EF-RF mount T Speed Booster® ULTRA 0.71x is already available for $479 at B&H Photo | Adorama | Metabones. The Canon EOS R Speed Booster increases maximum aperture by a stop, and it supports Dual Pixel AF and video AF. Filmmakers are now able to mitigate most of the 4k video crop factor of EOS R (1.75x) and EOS RP (1.63x) and reduce it to 1.24x and 1.15x respectively. Increase maximum aperture by 1 stop. There are quite a few comparisons regarding the Metabones Speed Booster which you can look up if you want. My 50mm f/1.0 seems to autofocus faster on my EOS-R than on any of my SLRs or DSLRs, and most importantly it always focuses perfectly , especially at f/1.0 where this lens sees as much as the human eye — something which no f/1.2 or f/0.95 lens can do. Jan 11, 2021. swkitt. Filmmakers are now able to mitigate most of the 4k video crop factor of EOS R (1.75x) and EOS RP (1.63x) and reduce it to 1.24x and 1.15x respectively. ... 50 mm to 800 mm Fast all-Acrylic Super-Zoom Lens for Canon EF/EF-M, RF, Sony E-Mount and Fuji MF being beta-tested now! Also, the image circle covered by this speed booster should be ~29.6mm given the size of the C70 sensor (if my math is correct). The Canon EF-RF mount T Speed Booster® ULTRA 0.71x is able to able “ to mitigate most of the 4k video crop factor of EOS R (1.75x) and EOS RP (1.63x) and reduce it to 1.24x and 1.15x respectively “. The Canon EF-RF mount T Speed Booster ULTRA 0.71x will adapt a Canon EF lens to the EOS R series RF mount and effectively makes the lens 0.71x wider. Like the speed boosters from Metabones and similar items from Viltrox and others, it allows you to use lenses designed for a larger sensor on a camera with a smaller sensor while retaining a wider field of view and, as the name suggests, effectively increasing the light transmission. Metabones EF-RF Speed Booster® ULTRA 0.71x - to adapt Canon EF mount full-frame lenses to the new Canon RF mount. The new Metabones EF-RF Speed Booster ULTRA 0.71x, however, helps to reverse this problem. Sharper corners, less distortion, reduced vignetting. Canon EOS-R and EF 50mm f/1.0 L on Control Ring Mount Adapter EF-EOS R. bigger. It widens the view when EF lenses are used on the EOS R and EOS RP to 1.24x and 1.15x respectively when shooting 4K video. The Metabones Canon EF to Canon RF Speed Booster T Ultra allows full-frame Canon EF and third-party EF-mount lenses to be used on crop-frame RF-mount cameras like the Canon EOS R and EOS RP. Sharper corners, less distortion, reduced vignettingMetabones EF-RF Speed Booster ULTRA 0.71x - to adapt Canon EF mount full-frame lenses to the new Canon RF mount. Metabones EF-RF Speed Booster ULTRA 0.71x - to adapt Canon EF mount full-frame lenses to the new Canon RF mount. S. RF with Older EF Lenses. Camera Compatibility. Metabones EF-RF Speed Booster® ULTRA 0.71x - to adapt Canon EF mount full-frame lenses to the new Canon RF mount. Other features include: Optical.

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