Canon officially announces the long rumored RF mount Cinema Prime Lens set

#21
mennonac said:
Why are these lenses all the same size
Click to expand...

Because when you change lens on your rig you don't have to re-position the follow focus, accessories, and the camera balance on the tripod; all cinema lenses series share the same size, shape, and very often a very similar weight. It's how you do it in the movies; rigs are much more complicate then in photography.
 
  • Like
Reactions: 1 users
Upvote 0
#22
"These lenses will allow for RF mount protocol transmission, and just like the EF-Mount Cinema Prime Lenses, operators can control magnification, chromatic aberration correction, peripheral light correction, and a dual-pixel focus guide via camera body operations. In addition, the new lenses also feature lens distortion correction."

Any idea why RF protocols would be an advantage for cinema lenses? AF wouldn't be applicable and the others listed are also on EF lenses - right?
 
Upvote 0
#25
Hector1970 said:
Out of curiosity, do they work well for photography? Any particular special rendering an ordinary RF lens wouldn’t give.
Click to expand...
I've never used one, but I'm sure they are excellent for photography if you are willing to use manual focus. They should have little or no focus breathing. It must be great for focus bracketing...
 
  • Like
Reactions: 1 users
Upvote 0
#28
Hmmm, this is strange. I wonder if these are just the CN-E lenses (based off EF mount L primes) rehoused with RF mounts and therefore do not have the new optics and coatings featured in the latest RF stills glass. Because it's extremely odd that Canon hasn't even announced some of these focal lengths in RF L versions yet.
 
Upvote 0
#29
David - Sydney said:
"These lenses will allow for RF mount protocol transmission, and just like the EF-Mount Cinema Prime Lenses, operators can control magnification, chromatic aberration correction, peripheral light correction, and a dual-pixel focus guide via camera body operations. In addition, the new lenses also feature lens distortion correction."

Any idea why RF protocols would be an advantage for cinema lenses? AF wouldn't be applicable and the others listed are also on EF lenses - right?
Click to expand...
If we ignore the EF600 and EF400 that were introduced together with the EOS-R, the RF lenses have the following features that EF lenses don't have:
  1. Faster communication, including sharing of sensor (e.g. accelerometer/gyro) data with the body
  2. Storing the aberration and distortion parameters in the lens instead of the body
The first one isn't useful for CN-R, since they lack both AF and IS, but the 2nd item is a much bigger deal. With EF lenses you have to load the correction data into the body yourself, RF lenses do that for you. As we've seen, for lenses that distort things in a novel way (24-105STM, 24-240) a firmware update for the body is needed to handle those parameters.
I suspect the big thing for video users is focus breathing correction, lenses can be much cheaper if the body handles focus breathing.

And if you're an EF-M user: Yes, EF-M supported in-lens storage of correction parameters first. And even better: the Sigma EF-M lenses provide proper correction info, so no weird onion rings in the EVF or video footage!
 
  • Like
Reactions: 1 user
Upvote 0
#30
koenkooi said:
And even better: the Sigma EF-M lenses provide proper correction info, so no weird onion rings in the EVF or video footage!
Click to expand...

Even EF Sigma Art lenses (dunno about Sport & Contemporary lines, but I tend to believe it's the same) provide correction info on all Canon bodies (DSLR, M, R), or at least the correction (if not provided by the lens) is already baked-in onto the bodies.
 
  • Like
Reactions: 1 user
Upvote 0
#31
Walrus said:
Even EF Sigma Art lenses (dunno about Sport & Contemporary lines, but I tend to believe it's the same) provide correction info on all Canon bodies (DSLR, M, R), or at least the correction (if not provided by the lens) is already baked-in onto the bodies.
Click to expand...
I suspect it's neither, for EF Sigma spoofs Canon lens IDs, which leads to the onion rings showing in the EVF/jpegs/movies, because the corrections the camera tries to use for the matching Canon lens won't match the focal length, as reported by the Sigma lens.
I suspect the onion rings are asymptotes of the algorithm, it tries to be clever instead of rejecting the corrections.
 
Upvote 0
#32
Exploreshootshare said:
I’d love it if canon would release seven f1.4 prime lenses for Rf Mount all at once never gonna happen, but imagine having

- 20mm F1.4
- 24mm F1.4
- 28mm F1.4 (for CR guy)
- 35mm F1.4
- 50mm F1.4
- 85 mm F1.4

All the sudden becoming available all at the same time :)

Apparently, six would do (because 14mm F1.4 would be a whole different lens and doesn’t fit the lineup). so, common Canon
Click to expand...

I am all in on the 20mm F1.4 and anything wider and fast (14mm F1.8 would do). Alternatively, a good 14-24mm F2.8 would also fit the bill. Canon has never served this end of the lens lineup very well and good alternatives were always available from Samyang, Rokinon and Sigma. I really wish Canon would either lift the RF lens mount embargo or release some fast ultrawides for the RF mount.
 
  • Like
Reactions: 1 user
Upvote 0
#33
koenkooi said:
I suspect it's neither, for EF Sigma spoofs Canon lens IDs, which leads to the onion rings showing in the EVF/jpegs/movies, because the corrections the camera tries to use for the matching Canon lens won't match the focal length, as reported by the Sigma lens.
I suspect the onion rings are asymptotes of the algorithm, it tries to be clever instead of rejecting the corrections.
Click to expand...
No spoofing, the camera knows exactly what is the lens attached; it is very well know that Canon conceded the in-camera corrections and (EF) AF algorithms to the recent Sigma's (and only to them; not to Tamron, not to Tokina). The only thing not available to Sigma is the DLO.

IMG_4677 copia.jpg
 
Upvote 0
#35
koenkooi said:
If we ignore the EF600 and EF400 that were introduced together with the EOS-R, the RF lenses have the following features that EF lenses don't have:
  1. Faster communication, including sharing of sensor (e.g. accelerometer/gyro) data with the body
  2. Storing the aberration and distortion parameters in the lens instead of the body
The first one isn't useful for CN-R, since they lack both AF and IS, but the 2nd item is a much bigger deal. With EF lenses you have to load the correction data into the body yourself, RF lenses do that for you. As we've seen, for lenses that distort things in a novel way (24-105STM, 24-240) a firmware update for the body is needed to handle those parameters.
I suspect the big thing for video users is focus breathing correction, lenses can be much cheaper if the body handles focus breathing.

And if you're an EF-M user: Yes, EF-M supported in-lens storage of correction parameters first. And even better: the Sigma EF-M lenses provide proper correction info, so no weird onion rings in the EVF or video footage!
Click to expand...
Appreciate the detailed response... but circling back, for these CN-R lenses, does RF protocols assist? I am assuming that they (for that price) aren't distorting things like the 24-240, 24-105STM, 14-35/4 and hopefully they would be par focal so not focus breathing issues.

Adding focus breathing compensation for all wider lenses would be awesome for the vlogging community as it is very distracting watching the videos.... they would be better fixing a manual focus distance instead to avoid it.
 
Upvote 0
#36
Looking at the photos of the new lenses, I was a little disappointed. I was hoping for something more like a shorter body or something that set the RF line really apart. These are the same as the EF version just with a permanent RF mount. I've been holding off on getting any more cinema lens having heard this rumor for the last two years. Seeing this announcement and looking at the specs, it feels like getting the EF versions is all-around better since they are cheaper ($1000.00 in some cases), you can add EF-to-RF adapters that have built in filters, and they would be backwards compatible with legacy cine cameras like my c200.
 
  • Like
Reactions: 1 users
Upvote 0
You must log in or register to reply here.

Similar threads

Canon Rumors
Canon Announces New EOS C400 6K Full-Frame RF Mount Cinema Camera and RF-Mount CINE-SERVO Lens
Replies
27
Views
2K
Ozarker
Ozarker
Canon Rumors
The Canon Cinema EOS C80 and Cinema EOS C400 to get native Adobe.io Cloud Integration in future firmware update
Replies
0
Views
335
Canon Rumors
Canon Rumors
Canon Rumors
Canon Announces 27x Portable Broadcast Zoom Lens and Next-Generation Digital Drive Unit
Replies
1
Views
988
Berowne
Berowne
Canon Rumors
Canon adds six filmmakers to the Explorers of Light program
Replies
1
Views
988
dirtyvu
D
Canon Rumors
Canon officially announces the EOS R1 and EOS R5 Mark II
Replies
236
Views
13K
frankchn
F
Top Bottom
Back
Home
Forums
Media
Menu