The tighter focal on RF lens is very likely due to the distortion correction or breathing correction in the camera as the sigma doesn't have any supported lens correction from canon.

That lens is gold on the full frame R5 C.

The way I was taught, parfocal is the idea that you zoom in, focus, and then can zoom out and things will remain in focus, but not necessary that it works the other way around, like you tried. I wish I had a lens that was, then I'd go try it right now.

Great video. I've been using this lens a lot and love it on my R3 and R5c. I miss the wide end on my c70 like you mentioned. If there is a full frame c70 in the future this would be the perfect combo.

Nice review. To hold focus, you need to zoom all the way to the subject and focus. When you pull out, it holds focus. This is how parfocal cinema zooms and ENG lenses work. No parfocal lens will work the other way around. Cheers!

Lol, the reason the 24-105 seems tighter than your other lenses, is because it’s longer! So the front element is literally sticking out further and is thus closer to the foreground objects you placed there. Perspective is determined by the front of the lens, not where the camera/sensor is. So if you’re backed into a wall, that matters, but it’s still capturing a 24mm field of view from the perspectives of the front of the lens.

Loved hearing your perspective on this lens. I'm not primarily a video shooter, but we do about 30-40% video work at the marketing agency I work for. There are some limitations of this lens, but the "one and almost done" description is truly a perfect way to talk about this one. I can absolutely say that it's the one lens I know for a fact I pack on every job now. Be it photography or video, this immediately became my primary lens for everything I do. So, in that sense, I have to say that I'm extremely pleased with my ownership. One thing I would like to point out about the 24-105 f/2.8 is the potential for the lens to perform POORLY on a RED Komodo. I don't know how RED has been with support for Canon lens profiles in camera, but this lens relies HEAVILY on distortion correction and that "electronically parfocal" feature works brilliantly on my R3/R5/R6II bodies - much more convincingly than your C70 demonstrated in this video. I imagine it will struggle on the Komodo without proper support for it. Distortions in the 24-35mm range are severe. With the Super-35 crop, the mechanical vignette shouldn't be a problem, but the distortions are great enough that straight lines will still be impacted inside the smaller FOV. I had to tell a friend to hold off or rent one because I'm just not sure how it will perform on that camera. Almost like Canon designed this lens to only work on Canon cameras....hmmmmmmm. haha jk

Can't wait to get my hands on this one day! I think for weddings this thing is going to rock!

C70 course has been super helpful. Recommend to anyone with the camera

Thank you for roominating on this very question, as a KX user I too have been wondering if I’d miss having a “real” 24mm FoV but I also know that the 35mm basically lives on my R5 AND my KX because I love the focal compression of 35mm. And it has basically been enough. I also know that more often than not, I’m finding myself wishing I had a little more zoom than a little more wide. So I guess, between your video and this comment, I’ve answered my own question. But all this talk has helped me turn down my hype level i’ve been dealing with over this lens. 😅

thnaks for the gimbal test, very interesting! 🙂 enjoy your content.

I haven’t used it yet for video but I have used it heavily for wrestling and basketball on my R3. All I can say is wow! It is fast, sharp, and on the R3 it points and shoots like it was made specifically for indoor sports.

Great video, as always. Adding to cart.

That first comparison between the sigma 24 and canon 24 was jaw dropping. Glad you showed some other examples. Great video👍

I've been very interested in this lens. My current setup is C70 + Speedbooster + EF 24-105 f4, which on the Speedbooster is f2.8 so I'm unsure what features I'd get for my money. Parfocal was a point of difference but your video confirmed that's not really a thing. To me, I see big price tag, loose wider end, longer and heavier (I travel a lot for work). The aperture dial sounds nice but

I just got this 2 weeks ago. I am still mainly a photographer but moving into video ore and more. Very re-assuring to hear from someone established, that the small fortune I invested was a good decision. You hit a lot of points I was thinking about e.g gimbal use.

For parfocal tests you should zoom in, get critical focus on an element, zoom out - if that element is still in focus when you've set focus and zoomed out and / or back in then it's parfocal equivalent (or as canon's marketing term implies "electronically parfocal")

as a C70 shooter for a independent school, I also find myself bouncing between talking head, doc style interviews and classic -roll and sports coverage. Would love more from you around shoot sports using the C70 and how you approach the rig, the day, just everything.

Nice review! Thinking about snagging it for the Komodo!

Nice video. Balancing the gimbal with the lens set halfway through it's focal range will help you're gimbal be more consistent at every focal length.

Awesome review and will definitely be buying this lens very soon (and in preparation for the full frame RF cine camera that MUST be coming soon... right)? One note: For the tighter 24mm FoV on some shots and not others, that looks exactly like the amount of crop that would be applied if you have the digital stabilization enabled on the C70. That might be the cause.

Thanks for this I've been waiting for some impartial usage based info on using this lens on the C70. It is that wide end that is giving me pause. I've been using the CN-E 18-80 adapted on a few doc shoots and really liking it. Very similar size and weight to this but it is f4 of course but you do get 18 at the wide end which would make it a one and done lens BUT it is slower...gah, always a trade off. The quality is better than all the EF stills lenses I've used though. This new 24-105 looks great it's just that wide end, but I might be over thinking it when it comes to practical use.

That lens is dope but if you have a c70 I would just get the canon speed booster and the ef 24-105 f4 it turns into a f2.8 anyways well exposure wise and you get a full frame field of view.

sold my c70 for an fx3 due to canon's lack of super 35 RF (stabilised) lenses. a 16-55 2.8 and they would have had me for life!

Dope video as always!😎

This just reminds me that I want a FF C70 with a viewfinder 😊

I have the 24-105. Love it. That parfocal-ish is really cool. Great looks. I have it on a C70 now but I have an R5c too, if needed. I just like the DGO image too much to not try to make the C70 work. I always have my Ring set to Kelvin. Great vids sir.

The focus breathing pretty much explain why the Sigma is wider when focusing closer.

I'm shooting with sony for several years, but this lense really grabbed my attention. Using the tamron f2-2.8 35-150mm for nearly 2 years now, which is the E-Mount "equivalen" I suppose. Great lense, but also prettty heavy with 1.1kg. For photo work this one is a beast, but when I filmed videos where I was closer to ppl / the action I switched to the sigma f2.8 24-70mm because the 35mm are to narrow when filming in a car. Really hope that sony makes his own f2.8 24-105mm lense. but I heard that it isn't possible because of the e mount / lense-sensor distance being so short.

3:28 with complex lens design(internal/external zoom/ floating elements etc), unless manufacturer starts to label it, it is impossible to tell exactly where does the fov vertex starts. But judging by the length of the 24-105, it is much further away from the camera body which is why you see the FOV seems narrower.

The EF to RF Speed booster has been great, but I hardly use it now as I'm now mostly on RF lenses. Now I'm feeling the need for a RF to RF Speed booster for the C70 and the other crop sensor R bodies.

A good alternative is to get the EF 24-105 f/4. Pair it with the speedbooster on your C70 and now you have a f/2.8 lens with the full focal range

I know these "impossible" modern lenses like this rf24-105 2.8 and rf28-70 f2 (as well as many many others) all rely on in camera corrections to produce an image. Is that is what is causing the difference in crop on the Sigma vs Canon at 24mm? Would be interested to see your results if you turn off in camera corrections?

So what I found out is that the lens is very wide but at the wide end on full frame you can see some of the lens from the inside. It might not actually cover the entire sensor because in lightroom when you disable lens distortion correction you can see a bit more and in a few shots I believe I saw heavy vignetting or parts of the lens on the corners.

really hoping sony does the same... i would love that zoom rocker at some point for crash zooming action sports/ sports content for sure!

finally dude.... :D was waiting for your review on this lens.. Im working on optimizing my setup from 1x c70 + 1xR5c+ 1xR3 to getting another C70 to get same image A and B cam. EF L series lenses.. 70-200 2.8 + 16-35 F2.8 + 24mm F1,4 + 50mm.. Small rig cages on both C70´s and 2x Rapid 75 tripods from Sirui.. 3 Avenger turtle base C - stands in a rolling bag from avenger and aputure lights galore.. sound equiptment and tentacle timecode + recorders.. and bla bla bla.. But damn how I would just freaking love to have an actual lens with that range (24-105 f2.8) with an EF mount.... or to have canon make a speedbooster that is RF to RF :P I hate that part så damn much... Canon should make a 15-65mm f2.8 :P pretty please... still focused around video with declicked aputure and all.. But I mean we will soon see the R1 and a new full frame C500 mark 3 with ND and RF mount..and the RED lineup has just given us Global shutter X cameras now.. Canon has to soon come out with just a match to the sony FX 3 and FX 6 regarding to sensor size. At least when they make that lens I think.

interesting to hear you have problems with your rs3 pro when zooming other lenses. the motors are so strong we have never noticed an issue. normally try to balance around 35-40mm on a 24-70

Hey, thanks a lot for making this. Can we see your film somewhere to see even more footage and what do you do with the c70 in the rain? In many doc shoots I have experienced that you can not trust on sunlight and the c70 is not splash water resistant right?

This lens release caught my attention hard. Thanks for providing real world use. I’m on a Sony system and would love a comparable offering for emount. I feel like they hit it out of the park with the internal zooming, aperture ring, af and stabilization. Still blows my mind that canon makes this amazing lens but doesn’t offer a full frame production camera to pair it with.

You mentioned shooting a wide variety of project types, and that is basically a dream of mine. It feels like 99% of people tell you to pick a niche and not do too many things, but you are proof that it doesn't have to be that way. Could you make a video explaining how you got to where you are and what your marketing and advertisement looks like? Thanks!

I agree with you (I think). If I was on a full-frame camera, this would be a go-to lens. But not on my C70. I need something wider, especially when filming artisans, doctors, and the like. I end up switching between a 15-35 and 24-70, and wishing there was something like the old EF-S 17-55 f2.8 but with an RF mount and L-level construction. Back in the C300mk1 days, many of us got good work done with that lens (despite its mediocre construction and other limitations). When I asked a couple people at Canon why they didn't offer an "L-level" version of that lens, they both said that the lens division wouldn't make an L lens for APS-C cameras. Sigh. I hope that's no longer the case. There's the Canon CN-E 18-80 T4.4, and the Fujinon MK 18-55 T2.9, both of which I've used (and basically liked). But I REALLY want Canon to release (or allow Sigma, Tamron, et al to release) a lens that's f2.8, at least 18mm wide, reaches to at least 70mm, and has good autofocus (and isn't priced over US$10K like a true cine zoom). I tell ya: The lack of such a lens is one of the things that keeps me looking at Sony and wondering.... Thanks for working with this lens and sharing your thoughts.

Use the Tamron G2 24-70 2.8. It's great and the Vibration Reduction works great paired with the C70

Great Video which grip is that those at 15:08? been looking to add something like that for when i get my C70

Great video. Based on your review it's not time for me to buy this particular lens. If the C70 was full frame this lens would be more attractive. If you press Auto Iris while rolling is the aperture adjustment declicked?

4:30 I bet the reason it looked tighter on the 24-105 is that the lens is so damn long it made the lens closer to the subject

if you had the sigma on the focalreduser(speedbooster) then that accounts for the difference. the sigma becomes a 16-47mm lens hence it is wider.

In regards to 3:13. My guess is canon is having to do some serious digital lens correction to pull off acceptable edge performance for such a fast and long zoom. But having said that, they would have to do less on their crop sensors bodies.

How did you do the sound effect on the intro music? I love that dj-ish rewind effect

My old Canon EF-S 17-55 IS USM is parfocal too when I focus when focus to subject happen after all the way zoom in. Also old and super cheap Canon EF-S 10-18 IS STM is parfocal in that way. But true cinema lens is parfocal in any situation for example DZOfilm 18-90 T/2.8 or Laowa Ranger 28-75 T/2.9

I wonder if the wider field of view with the sigma has to do anything with lens corrections not being applied. Or even with the canon lens and digital IS applied ? Just a thought. Also it could be that the sigma lens breaths a lot more as shown by your tests

okay I love this sense and I used the EF version of it for years but did anyone else catch the FLY at 9:55

Tamron 24-70mm g2 has 5 stop of IS similar to rf 24-70 but only $500 paired with a speed booster hard to beat

What autofocus settings you find work best with the sigma 24-70? I thought the ibis on the lens wasn’t working or something like that… at least I’m not the only one that finds it jerky!

haha now that NIkon owns RED I'm not sure about the RF mounts but I still agree - this lense will age well

its because focal length is a measurement from the optical center of the lens... this means ALL lenses are potentially wider or tighter to some degree if other factors in the optic are in the way. Thats why wide angle glass is typically smaller( more compact) at say 16mm vs say a long prime at 200mm is larger its a distance thing. Not a measurement of FOV but the actual glass to the focal plane

Great video mate! I been seating on the fence for weeks now. Perhaps you can end my pain I have cano R3 , loving it. Im torn between buying only this lense ( 24-105 F2.8) , OR get two combination of lenses : canon 24-70 f2.8 + canon 70-200 F2.8. I shoot hybrid photos and videos. The idea of having one lense is amazing, no need to change anymore and carry less. But the size of the new Z lense is just big and might be heavy to carry for hours on my shoulder as I walk around. what would u do in my situation ? :)

Eric could you do a video about balancing the C70 on a gimbal, which ones work, and what lenses you'd recommend? I've tried to use the C70 on an RS2 with an RF 24-70, but it's impossible to balance and keep balanced while doing any movements.

I have the RF 24-70 F2.8 and other RF lenses. You are welcome to borrow them for your reviews! I'm in Boston/Cambridge as well

Background compression shifts when perspective shifts - i.e. when you physically move closer or further away from a subject. This does not have anything to do with focal length or FOV. So it's interesting to me that the perspective *does* change when you swap lenses, which makes me think something is happening optically under the hood that effectively emulates moving physically closer to the subject without moving the camera body/sensor plane. Unless you did accidentally move the camera a smidge closer when you swapped lenses, which could also explain it. ;)

If you use it on a gimble I would set it some where around the halfway point 40mm. Should be good to go. I want this lens. I currently have the RF 24-70 which lives on my camera. My concern is the weight but it is only about a 1lb more. Hmmmm

thanks for this

Any chance you left on electronic stabilization in your test? It would crop.

Got any tips on where I could find one in stock to order here in the US? Been hunting to pair with my C70s…

Thanks for this video! I’m a week in a loving it! I did a video of popping it on the s60 slider, worked surprisingly well!

It's 36-157 on a 1.5 crop. Perfect for 85% of every shoot.

Do you ever experience a spot on the center of your frame when you use the speed booster? I had purchased one and in some light conditions I notice the less contrast spot in the middle. Any advice?

always had the same exact issue with the 24-70 Sigma, finally selling it lol

This is the review I needed, thank you. Were you using the 24-105 for the Q&A at the end? The focus hunting (eg at 17:25) is something I've been fighting with my C70 since I got it. I have all EF glass, so I'm always on the speedbooster, and I've wondered if RF glass would fix that issue. When we are shooting follow-doc style, I get burned by that focus hunting because there is no "take 2." Frankly, I've found the C70's autofocus to be disappointing - in a particularly egregious way. It works great about 85-90% of the time, just enough to create a false sense of security. But I find those momentary hunting "blips" sneak in and ruin otherwise good shots. For follow-doc I mostly live on the EF 24-105 and DJI RS3. I've had (well lit) scenes where the camera just refused to hold on to a face, no matter what I did. And I've had seated interview shots on sticks where it would decide to hunt in the middle of the shot for no apparent reason. I find this infuriating frankly, and it makes me envious of the guys on Sony's. As a workaround, I've mapped the AF to a button on the front of the camera (under the lens mount) and I can usually get it to find the subject long enough to then turn off AF and hope for the best. I'm old enough to be aware that these are first-world-problems, it feels bratty to complain about this mind-blowing technology. Growing up was all manual all the time. The frustrating part for me has been living in this "uncanny valley" of almost perfect, where I can rely on it until the unpredictable second that I can't. Anyway, would appreciate your thoughts on it, and if you've noticed a difference in the AF performance between EF speedboosted and RF lenses.

is the focus breathing issue. the more close up you focus. the tide framing you will get. is the same goes to macro lens.

Does it make a tick tick tick sound when focusing, like all of their RF L series lenses (as ridiculous as that is)? Thanks.

EF-S 17-55mm F2.8 is a very underrated lens, especially on Canon C300 Mark II, it covers UHD but not 4K at the widest on this camera. It’s as sharp as a knife and very quick to focus, effectively an L lens. It’s pretty wide on a Super35 sensor and pretty cheap used. Hope this helps someone. Regards, Charles

do you feel the C70 is a bit soft for product shots?

the difference in field of view is a very weird result please dive deeper into this as im also eyeballing the 24-105 for my c70 as well

when one 24 is wider than another 24!.. a) one brand may be telling lies b) some stabilisation or lens correction algorithm might be cropping. c) a non 'xxx insert title' (parfocal?) lens will change focal length through the focus range. Your 'wide gv' didnt show much difference while your interior tests did. Maybe one of the '24mm' lenses is 24 at infinity and 27mm at 36inches. while the other is 24mm at infinity and 25 at 36inches. Trying the XF605 vs my r6 and rf 24-105 the r6 is much tighter until I turned of all stabilisation. My r6 (when all stab is on) is so cropped Im thinking to use a 16-35 instead of a 24-70 for my 'street' work. (Ive not tested if 'engage crop mode' is an assignable button.. but that would play big on lens choices) With a c70 and RF you loose the speed boost and FOV.. so an EF 24-105 (any brand) is surely better for the C70 than a rf 24-105 2.8 - which would be great on an R5c or R6. (which are not great video cameras.. no nd etc) Alll the canons Id 'like' to own C500, C70 dont make best use of this lens. Im may get a C500 used in two years, a rfC500ii not for 5 years. Fullframe and 6400 you get narrow dof and low light. So this lens seems to be a kind of undeeded technological marvel if you are shooting on a mirrorles fullframe. With a RFC500ii it will be part of the best RnG setup ever!

Could the field of view difference be because the RF 24-105 2.8 is physically longer than the sigma 24 prime? Just an idea but maybe it’s because the RF lens sticks out more so it’s closer to the subject ending up in less field of view. Curious to hear everyone’s thoughts!

11:23 that's not a fly, that's a bird! They breed em big in Boston Mass haha

The real question is, can you control the zoom inside the camera?

@SoundItOutFilms I noticed you removed some of the plastic covers for the inputs on your C70... is that irreversible? can you put them back in??

Regarding the field of view issue, I thinks it you are being tricked by the longer lens and the different placement of elements and lenses withing. Try comparing it on a larger shot, an entire room or maybe even outside somewhere. Cheers for allways making excellent videos!

field of view looks different simply because the lens is physically longer

The “range” of this video is just focus breathing. That’s why when close it was less wide but farther away it was almost the same.

The bottle getting out of focus just has to do with the AI object selection algorithm. All cameras have trouble with that. For us as humans, it’s obvious that the bottle at 24mm is the same bottle at 105, but for the software, it’s not obvious that it’s “the same object”. Way different than face or eye tracking, computers have been trained for years to be able to recognize what’s a face in all different kinds of lighting, angles, and focal lengths. Either way you are right, big difference between mechanically parfocal and electronic parfocal.

Could the difference in focal length be related to the IS?

I’m half way through so maybe you’re going to explain it still but why don’t you get a 15-35 2.8?

the 24mm in the 20-105 is narrower because the lens is longer and the distance from the 24mm to the subject is less than in the 24-70 ef

I'm interacting with your channel!

what exactly is a Z lens

Hix, it should be 1,300 G i/o 1300 KG! :-)

Your “establishing shot” you show at around 5:10 is not that far from where I live. If you’re ever up in NH working again and need a second shooter, please let me know. I’m a canon C70 and R5c user myself with a fair selection of RF glass and good selection of lighting as well. And my name is also Eric so… you know, lol. Just putting it out there.

Vivek!!

Amazing you got so close to a former US president

Brian Chippendale?

why the Z in the name?

12:06 1300 kilograms sure does make for a heavy lens 😆

Who/what organization is hiring you for those political events? I'd love to do more work like that, but have no idea who is pay for that job.

Terrible vignetting at 24mm and crazy distortion. The RF 24-70mm 2.8 is better.

Canon can claim its parfocal because canon is okay with being dishonest. haha. AF based parfocal isn't true parfocal. Canon isn't the only company making this claim with AF based parfocal lenses though. Maybe one day the tech will get to a place where its AF based parfocal is seamless enough to not make a difference, but we definitely aren't there yet.

I've been very interested in this lens. My current setup is C70 + Speedbooster + EF 24-105 f4, which on the Speedbooster is f2.8 so I'm unsure what features I'd get for my money. Parfocal was a point of difference but your video confirmed that's not really a thing. To me, I see big price tag, loose wider end, longer and heavier (I travel a lot for work). The aperture dial sounds nice but