Canon RF bayonet
The Canon RF bayonet is a lens bayonet connection for Canon 35mm system cameras of the EOS R digital camera system . The information between the camera and lens is only transmitted digitally.
Lenses with an EF or EF-S bayonet can be connected to an EOS-R camera using an adapter; the reverse is not possible due to the smaller flange focus . The EOS-M bayonet introduced by Canon in 2012 is incompatible with the RF bayonet in both directions.
RF bayonet
introduction
The RF bayonet has been around since September 2018, when it was presented with the first Canon EOS R camera, the EOS R , at the photokina in Cologne, together with four lenses:
- RF 24-105mm f / 4L IS USM
- RF 28-70mm f / 2L USM
- RF 35 mm f / 1.8 MACRO IS STM
- RF 50mm f / 1.2L USM
construction
The RF bayonet is a further development of the EF bayonet. It has more electrical contacts and a shorter flange focal length. However, EF lenses can be connected to EOS-R cameras with a passive adapter that compensates for the distance and loops through the contacts. The RF bayonet has a flange focal length of 20 mm and a diameter of 54 mm, while the EF bayonet has a flange focal length of 44 mm and a diameter of 54 mm.
service
On the top of the camera, the RF bayonet has a red line; this must be opposite the red line on the lens when it is attached. Then the entire lens is rotated clockwise until it clicks into place. A button on the housing is pressed to unlock.
Some RF lenses can only be dimmed electrically, i.e. only if the electrical contacts are connected to those of the camera. This means that either an adapter is required if the lens is operated in the retro position , or the lens must be removed from the camera while the dimmer button (not available on all EOS cameras) is held down. Then the lens remains dimmed when it is removed.
All RF lenses can also be focused manually with an adjustment ring. The autofocus mode is switched with a slide switch on the lens. With conventional RF lenses, the setting ring is mechanically decoupled when it is set to manual focus and can be moved freely. Lenses with full-time manual focus can also be focused manually when they are switched to autofocus. This allows corrective action to be taken after the camera has focused.
Data transfer
The data is transmitted digitally between the camera and the lens using a serial protocol. Canon has not published the pin assignment or the data transfer protocol used . For third-party lens manufacturers, this represents a hurdle that can only be overcome by reverse engineering .
Cameras
Currently (July 2020) there are five Canon cameras with RF bayonets, all with full-frame sensors :
Lenses with RF bayonet
From Canon
lens |
Max. Light intensity |
introduced | macro | USM |
Stepper motor |
IS |
Filter diameter |
Lens diameter |
Lens length |
Weight | source |
---|---|---|---|---|---|---|---|---|---|---|---|
RF 15-35mm f / 2.8L IS USM | f / 2.8 | 2019 | No | Yes | No | Yes | 82 mm | 88.5 mm | 126.8 mm | 840 g | |
RF 24-70mm f / 2.8L IS USM | f / 2.8 | 2019 | No | Yes | No | Yes | 82 mm | 88.5 mm | 125.7 mm | 900 g | |
RF 24-105mm f / 4L IS USM | f / 4 | 2018 | No | Yes | No | Yes | 77 mm | 83.5 mm | 107.3 mm | 700 g | |
RF 24-105mm f / 4-7.1 IS STM | f / 4-7.1 | 2020 | Yes | No | Yes | Yes | 67 mm | 76.6 mm | 88.8 mm | 395 g | |
RF 24-240mm f / 4-6.3 IS USM | f / 4-6.3 | 2019 | No | Yes | No | Yes | 72 mm | 80.4 mm | 122.5 mm | 750 g | |
RF 28-70mm f / 2L USM | f / 2 | 2018 | No | Yes | No | No | 95 mm | 103.8 mm | 139.8 mm | 1430 g | |
RF 70-200mm f / 2.8L IS USM | f / 2.8 | 2019 | No | Yes | No | Yes | 77 mm | 89.9 mm | 146 mm | 1070 g | |
RF 100-500mm f / 4.5-7.1L IS USM | f / 4.5-7.1 | 2020 | No | Yes | No | Yes | 77 mm | 93.8 mm | 207.6 mm | 1530 g | |
RF 35 mm f / 1.8 MACRO IS STM | f / 1.8 | 2018 | Yes | No | Yes | Yes | 52 mm | 74.4 mm | 62.8 mm | 305 g | |
RF 50mm f / 1.2L USM | f / 1.2 | 2018 | No | Yes | No | No | 77 mm | 89.8 mm | 108.0 mm | 950 g | |
RF 85mm f / 1.2L USM | f / 1.2 | 2019 | No | Yes | No | No | 82 mm | 103.2 mm | 117.3 mm | 1195 g | |
RF 85mm f / 1.2L USM DS | f / 1.2 | 2019 | No | Yes | No | No | 82 mm | 103.2 mm | 117.3 mm | 1195 g | |
RF 85 mm f / 2 MACRO IS STM | f / 2 | 2020 | Yes | No | Yes | Yes | 67 mm | 78 mm | 90.5 mm | 500 g | |
RF 600 mm f / 11 IS STM | f / 11 | 2020 | No | No | Yes | Yes | 82 mm | 93 mm | (199.5) 269.5 mm | 930 g | |
RF 800 mm f / 11 IS STM | f / 11 | 2020 | No | No | Yes | Yes | 95 mm | 101.6 mm | (281.8) 351.8 mm | 1260 g |
In 2020, two extenders, one with 1.4 × and one with 2 ×, were introduced.
RF85 mm f / 2 MACRO IS STM on Canon EOS R6
RF800 mm f / 11 IS STM on Canon EOS R5
From other providers
In February 2019, the Korean lens manufacturer Samyang Optics was the first to announce two of its own lenses for the RF mount. These are operated completely manually and do not transfer any data, nor do they have any contacts for it.
Manufacturer | lens |
Max. Light intensity |
Autofocus | source |
---|---|---|---|---|
Samyang | 14 mm | f / 2.8 | Yes | |
Samyang | 14 mm | f / 2.8 | No | |
Samyang | 85 mm | f / 1.4 | Yes | |
Samyang | 85 mm | f / 1.4 | No | |
Venus Optics | 12 mm | f / 2.8 | No | |
Venus Optics | 15 mm | f / 2 | No | |
Venus Optics | 25 mm, Macro 2.5-5 × | f / 2.8 | No | |
Venus Optics | 100 mm, Macro 2 × | f / 2.8 | No | |
7artisans | 60 mm, Macro | f / 2.8 | No | |
Meike | 50 mm | f / 1.7 | No | |
Meike | 85 mm | f / 2.8 | No | |
Zhongyi Optics | 50 mm | f / 0.95 | No | |
Kipon | 24 mm | f / 2.4 | No | |
Kipon | 35 mm | f / 2.4 | No | |
Kipon | 50 mm | f / 2.4 | No | |
Kipon | 75 mm | f / 2.4 | No | |
Kipon | 90 mm | f / 2.4 | No | |
Lensbaby | 28 mm | f / 3.5 | No | |
Lensbaby | 45 mm, tilt | f / 3.5 | No | |
Lensbaby | 56 mm | f / 1.6 | No | |
Lensbaby | 85 mm | f / 1.8 | No |
Individual evidence
- ^ Wadim Herdt: Canon EOS R - "R" like mirrorless . In: Hans Stübinger; Dirk Waasen (Ed.): Color Photo . tape 11/2018 , November 2018, ISSN 0343-3102 , p. 6 .
- ↑ The revolution in the full format segment: Canon presents mirrorless full format cameras with a new RF bayonet. In: canon.de. Canon, September 5, 2018, accessed February 6, 2019 .
- ↑ EOS R System White Adapter. (PDF) In: canonrumors.com. canon USA, September 5, 2018, accessed February 6, 2019 .
- ↑ The lens guide. In: objektiv-guide.de. July 9, 2020, accessed July 10, 2020 .
- ↑ Canon Germany: Specifications and Features - RF 15-35mm F2.8L IS USM. Retrieved on August 29, 2019 (German).
- ↑ Canon Germany: Specifications and Features - RF 24-70mm F2.8L IS USM Lenses. Retrieved on August 29, 2019 (German).
- ↑ Canon RF 24-105mm f / 4L IS USM. Retrieved February 7, 2019 .
- ↑ Canon Germany: RF 24-105mm F4-7.1 IS STM. Retrieved on February 13, 2020 (German).
- ↑ Canon Germany: Technical data & functions for the RF 24-240mm F4-6.3 IS USM lens. Retrieved on July 9, 2019 (German).
- ↑ Canon RF 28-70mm f / 2L USM. Retrieved February 7, 2019 .
- ↑ a b Canon Germany: Canon expands its RF lens range with the RF 70-200mm F2.8L IS USM and the RF 85mm F1.2L USM DS - Canon Press Center. Accessed December 1, 2019 (German).
- ↑ a b c d e new releases 2020. In: canon.de. Canon, accessed July 9, 2020 .
- ↑ Canon RF 35mm f / 1.8 IS Macro STM. Retrieved February 7, 2019 .
- ↑ Canon RF 50mm f / 1.2L USM. Retrieved February 7, 2019 .
- ↑ RF 85mm F1.2 L USM. Retrieved May 9, 2019 .
- ↑ Press contact, Project Manager PM & Marketing / Product Manager: Samyang announces first lenses for Canon RF: 14 mm F2.8 and 85 mm F1.4 available from May. Retrieved February 28, 2019 .
- ↑ Samyang AF 14mm F2.8 RF. Samyang Optics, accessed February 21, 2020 .
- ↑ Samyang MF 14mm F2.8 RF. Samyang Optics, accessed February 21, 2020 .
- ↑ Samyang AF 85mm F1.4 RF. Samyang Optics, accessed July 3, 2020 .
- ↑ Samyang MF 85mm F1.4 RF. Samyang Optics, accessed February 21, 2020 .
- ↑ LAOWA 12 mm f / 2.8 Zero-D. Retrieved February 21, 2020 .
- ↑ LAOWA 15 mm f / 2 Zero-D. Retrieved February 21, 2020 .
- ↑ LAOWA 25 mm f / 2.8 Ultra Macro 2.5-5X. Retrieved February 21, 2020 .
- ↑ LAOWA 100mm f / 2.8 2x Ultra Macro APO. Retrieved July 3, 2020 .
- ↑ 7 Artisan's 60mm F2.8 macro. Retrieved February 21, 2020 .
- ↑ Meike MK-50mm F1.7. Retrieved February 21, 2020 .
- ↑ Meike MK-85mm F2.8. Retrieved February 21, 2020 .
- ↑ Mitakon Speedmaster 50mm f / 0.95 III. Retrieved February 21, 2020 .
- ↑ a b c d e KIPON releases ELEGANT series lenses. Retrieved February 22, 2020 (English).
- ↑ Lensbaby Trio 28. Retrieved February 22, 2020 (English).
- ↑ Lensbaby Sol 45. Retrieved February 22, 2020 (English).
- ↑ Lensbaby Velvet 56. Retrieved February 22, 2020 (English).
- ↑ Lensbaby Velvet 85. Retrieved February 22, 2020 (English).