I love your set. Looks very nice!

@JoshBirman

Жыл бұрын

Thank you!!

HA! I sit down to watch super stoked since I’ve been drooling over this lens and then I burst out laughing at the shoutout. Also thanks for the rad video. Gotta start saving for this beast. Can’t wait to see what you do with this lens on a wedding shoot!

@JoshBirman

Жыл бұрын

❤️ To be fair, I only rented the lens. So I have to save up for it too 😢

It got confusing really fast. Lol good video. I forgot about the speed booster EF Vs RF thing

@JoshBirman

Жыл бұрын

Yeah… it definitely gets a bit complicated 😂

Great song choice for the beginning! I liked the editing to the beat. You know so much about lenses it makes me say wow. What is the difference between EF and RF?

@JoshBirman

Жыл бұрын

Thank you!! The RF mount is Canon’s replacement for their older EF lens mount. Back in 2018 they began the transition and started phasing out the older EF lenses.

I'm using the RF24-70 on my C70 currently. Thought about the 15-35, but there is just something about having a 35-105 lens without having to switch lenses. But the IS is unbelievable, love it. I switch back to a Sigma 18-35 1.8 for open dancing/lower light.

@JoshBirman

Жыл бұрын

My dream is to have the RF 15-35 and the RF 24-70 and just exclusively use those on my C70.

@richardnayfilms2812

Жыл бұрын

@@JoshBirman Those would be awesome! Though I will say, the 1.8 vs 2.8 is definitely very nice to have when it comes time to open dancing and lower light receptions. 2.8 starts not being enough :(

@JoshBirman

Жыл бұрын

Fair enough 😄

Nice review and the zooming in and out getting dark and correcting itself is normal. If you zoom fast, you’ll see it. If you zoom slow and steady, you won’t be able to tell. 😁👍

@JoshBirman

Жыл бұрын

So weird, I wonder why it does that. Never seen another lens do that before.

@mrheng562

Жыл бұрын

@@JoshBirman , it’s the light traveling through all the differ lens elements to get to the sensor and camera adjustment while focal length changing. I can’t explain the physics, but that’s how I understand it. Light needs to catch up with the changing distance between lens elements. 😁👍

EF 24-105 mm f/4 IS II + the speed booster is the best run and gun combo for the C70.

@JoshBirman

6 ай бұрын

How’s the sharpness in that lens? I’ve got the Mark 1 and it kinda sucks 😄

@zaodekov

6 ай бұрын

I don’t shoot teat charts. Mostly people, interiors and events. For those purposes it is perfect.

The brightness change while zooming is normal, because even wide open, when you change focal it changes also the physical size of the aperture iris, otherwise if you zoom but the iris size wouldn't change, then the f-stop would change too, because they are directly correlated. Example, in a 50mm f2 you do 50/2 so wide open the iris size is 25mm, when you stop down to f4 the iris size is 50/4 so 12,5mm, and so on. If your lens is an imaginary 50-100mm f2 constant aperture, we already seen that at 50mm the iris size is 50/2=25mm then you zoom at 100mm but the aperture remains f2, so what happen to iris? The iris size gets bigger, 100/2=50mm, and it's logical if you think about it (focal length is longer, so light travels more distance inside the the lens to reach the sensor, and gets lost, so the iris needs to be physically bigger to have more light entering it, so same amount of light reaches sensor at 100mm like at 50mm, because we said that f-stop, so light reaching sensor, should be the same at all focal length of the zoom). So iris size is variable even if f-stops are constant in a zoom. The last thing also explains why the 24-70 is darker at 70mm; what I explained above is the ideal behaviour of a lens (iris getting bigger while zooming, to compensate for light loss; in the case of 24-70, wide open, iris opening passes from 24/2.8=8,57mm to 70/2.8=25mm), but "ideal" is not always quite reachable 🙂 so yes iris gets bigger at 70mm to accomodate more light, but due to project and physical constraints and limitation in the project, that iris size sometimes can't really reach 25mm, but maybe just 24,5mm or 24,8mm, just for example. So NOMINALLY your lens is still f2.8 at 70mm for the sake of simplicity, but actually could have become a f3 or f3.2 lens at 70mm, something like that. To put something you are surely familiar as a videomaker, let's say that usually zooms, even when they are professionals and have constant and not variable f number, will lose some tenths of T-Stop while zooming in. Or, and I close it 😀 they would lose tenths of t-stop while EXTENDING; so the 24-70 II you have loses light while zooming to 70mm because it extends that way (longer it is, more light it loses), but if you consider the old ef 24-70 which had a reverse zoom mech (it was longer at 24mm and shorter at 70), you probably would have found that the lens is darker at 24mm and brighter at 70mm, opposite to yours.

@ritrattoaziendale

11 ай бұрын

(with zoom video lenses that doesn't happen 🙂 because they're manufactured to have constant T stops across the range, and in fact they are sold with t-stops markings, and not f-stops. F-stop just describe the physical opening of the iris, which is not directly correlated, as we saw, to the effective amount of light reaching the sensor, that could be less due to lens length. But in photography nobody cares because you shoot one frame at a time. In video you shoot at least 24 frame per second and visualize them one after the other, so brightness changes are pretty evident. That's why video lenses describe their light transmission, t-stops, to the sensor, instead of just the size of their iris, which is described by the f-stops. Then, also primes change their brightness depending on the focus distance, because lenses move inside the barrel and change the travel of light. But that's too much even for me, I studied as accountant, not as an engineer! )

@javison_4

5 ай бұрын

use paragraphs bro

Why not the 16-35mm 4.0 IS with SB , would equal out. EF lenses do not have the STM focus motors , I believe the RF does

@JoshBirman

Жыл бұрын

That’s a good point! It would be a decent amount heavier and longer though, so I’d probably still go with the RF.

That’s exactly my problem. Can’t decide between sigma 24-70 with speedbooster and rf 15-35. It’s really complicated

@JoshBirman

Жыл бұрын

It’s such a hard decision

@smakujem3966

Жыл бұрын

@@JoshBirman I went with Canon 24-105 mk II. With adapter I have 2.8 aputure and most universal focal length. Not so popular option but I like it so far. And much cheaper then RF

@JoshBirman

Жыл бұрын

Nice! How are you liking it? I have the Mark I of that lens and it’s sadly not very sharp.

@smakujem3966

11 ай бұрын

@@JoshBirman I like it so far. Lighter, cheaper, and better IS than Sigma 24-70 2.8. And I didn't noticed huge sharpness diffrence between those two, without doing some crazy compasion test they look similar. So I'm content and I think this is the most universal lens for C70 right now on market. With that said I guess at some point it would be nice to go RF. Or R5C to get full frame with RF lenses but you loose ND and battery life. I guess you just need to know your needs very well.

Me sitting with my nifty-fifty and canon m50: "interesting..." Also, isn't cat-eye shaped bokeh pretty much inevitable on all lenses as light sources creep towards the edge of the frame? Curious as an example of the RF lens' edge bokeh wasn't shown. 🤔Sorry for spamming all the comments at once btw, I'm on a mini binge!

@JoshBirman

Жыл бұрын

Yeah, pretty much. I actually did show the RF’s edge performance. It handles it super well and only deforms the bokeh slightly.

@sundersquare

11 ай бұрын

@@JoshBirman but the RF edge performance you're looking at isn't really at the edge of the image circle as you aren't using full frame

The bird! 😂

@JoshBirman

Жыл бұрын

Definitely was not expecting that 😂

So what’s your verdict after 6 months ?

@JoshBirman

6 ай бұрын

I rented the 15-35 to make this video and planned to pick one up eventually. Unfortunately finances didn’t allow for it this year so I have yet to actually buy it 😞 I did use it again at a wedding recently and I’m absolutely in LOVE with the stabilization! The focal range does feel limiting though for someone like me who’s coming from a 24-70. I think will probably end up buying the RF 24-70 first, and use a speedbooster EF lens to get my really wide shots.

@doktorr23

6 ай бұрын

@@JoshBirman I already have the RF 15-35 that I use with my R5. I recently got the c70 and was thinking if I should get the ef 24-70 speed boosted so it’s more versatile. How is the autofocus on ef 24-70 ? Is it loud and jumpy ? Thanks again!

@JoshBirman

6 ай бұрын

@mustafaAli-ik2qe I think I covered most of your questions about the EF 24-70 in the video. Autofocus is roughly the same as the RF but quite a bit more noisy. Stabilization and sharpness are the key differences.

@doktorr23

6 ай бұрын

@@JoshBirman thanks again!

My only problem with RF is the few extra hundreds in price

@JoshBirman

2 ай бұрын

Yeah, they’re not cheap 😅

I don't know man... I need about five more shots of you sprinting at the camera before I can make up my mind. Also, if you could put on a gorilla suit, that would also be very helpful. 🙏

@JoshBirman

Жыл бұрын

Hahahaha 😂 I’ll keep that in mind for next time

@bigwinmedia5100

Жыл бұрын

@@JoshBirman 🤣. Just messing obviously. I love how you ran so fast but kept a straight face. 😂

@JoshBirman

Жыл бұрын

That’s what I get for running track I suppose 🤷🏻‍♂️

Consider the EF 85mm f1.4 IS for the long. Good IS and not $3K.

@JoshBirman

Жыл бұрын

A nice lens for sure, but unfortunately not the focal length I’m looking for.