Best video on this topic ever. The Sigma 18-35 will work except you don’t get a full circle view until 24mm or so. From 24 -35 it does work.

Great in depth information. I want this as B cam along my C200 as an A cam. Finally get the full potential with full frame, as you said, with all my EF lenses I already own.

Brilliant video as usual.thanks

Excellent summary. Really nicely produced video! Subbed, keep it up!

@Josh_Sattin

Жыл бұрын

Thank you!

FANTASTIC video dude! Hopefully KZread recommends this video for every speedbooster search because this is the best on the topic yet!

@Josh_Sattin

2 жыл бұрын

Thanks Tyler! I hope so too!

@DuffTV

2 жыл бұрын

Hi Josh, hey mate here in Australia the Canon speedbooster is hard to find, what's your take on the Metabones brand?

As someone who’s about to pull the trigger on the C70, I appreciate the time you put into this. Definitely gave me food for thought. Keep up the excellent work sir.

@Josh_Sattin

2 жыл бұрын

Glad to hear that this video was helpful for you. Thanks for watching!

I wonder if a Matt box would have stopped the purple dot in the sample you showed. Have you gone RF? Thanks Josh

How about the metabomes rf-ef speed booster? They have way more experience making focal reducers and have a great reputation with their optics.

Did you have a matte box on or any kind of shade? The camera angle seems to be shooting lower than eye level and tilted up. Thanks!

You are so close to explain it well. I thing, instead of focal length and f-stop, just the enter pupil affect DOF. So only enter pupil and distance changes DOF in case of lens. But becouse longer focal length to stay the same f-stop needs bigger enter pupil ;). Greate tutorial

Your stuff is always clear and concise: thanks! I have been close to getting a C70, but the head of my prior camera course claims it's not truly a full-frame camera. As a creator of independent docs, maybe I'll wait for the anticipated C90, which is rumored to be full-frame with raw. Enjoy your presentations!

@Josh_Sattin

2 жыл бұрын

Thank you so much. Some would argue that S35 is the proper sensor size for cinema cameras. Most of the super high end cinema cameras are in fact S35. But yes, the C70 is not a full frame camera.

@dukebozikowski3801

10 ай бұрын

@@Josh_SattinWon’t the speedbooster decrease sharpness and increase abberations?

you mention another adapter, is that a standard Eos R ef-Rf adapter like $120? i thought is didn't fit

Excellently explained problematic with clear examples. Canon EF 85mm f/1.4 IS USM must be extraordinary with such accessory.

@walktroughman1952

7 ай бұрын

85 f/1.4 reduced would be a 60mm f/1.0 so yeah it'd be pretty insane.

Do you not have to add the crop factor back in? 24mm x 0.71 = 17mm full frame equivalent then the 1.5 crop factor gets you to a 25.56mm equivalent. Right?

How's the edge IQ with ultra-wide lenses? I used speedbooster with EF-S lenses on MFT bodies and was disappointed with that aspect. A lot of different aberration degrading image.

Super video :) Will the Canon C70 + Tamron SP 24-70mm f/2.8 Di VC USD G2 (Canon) work 100% with the Canon EF-RF 0.71x Mount Adapter?

@Josh_Sattin

Жыл бұрын

Thank you. I personally have not tested that lens so I can't say for certain.

@videofocusart

Жыл бұрын

@@Josh_Sattin Just bought it today and so far so good :)

Nice video. I have a little: Is it possible to disable the focal reducer on this adapter so It can act like a basic adapter?

@Josh_Sattin

Жыл бұрын

Nope. But, you can easily swap this out with the basic $100 Canon EF-RF adapter.

Superb video! Do you know if there is a possibility to mount it on C200?

@Josh_Sattin

Жыл бұрын

Thanks. Unfortunately you can only use this on a RF mount camera. The C200 has an EF mount.

@sergium6317

Жыл бұрын

@@Josh_Sattin There is a Ef To Rf lenses for C200?

@Josh_Sattin

Жыл бұрын

No. You can only use EF lenses on and EF body. There is no way to adapt a RF lens to a EF body because of the flange distance.

Damn! I wish there was Full Frame version of the sigma art 18-35. That would be such a popular lens.

@Lizardheim

2 ай бұрын

Closest is their 24-35 F2 for fullframe

Hi Josh, could you use this speedbooster for photography on maybe an R7? I would think, that it is better quality than the ones from metabones or viltrox?

@mvp_kryptonite

Жыл бұрын

I’m interested in this too with the 70-2002.8 ii and 400/5.6

@dioniziocarvalho861

4 ай бұрын

Seria possível em câmeras aps-c como R7???

@dioniziocarvalho861

4 ай бұрын

Would it be possible on aps-c cameras like R7??

I hope this works on the r7

New c70 user here. I’ve attached the speed booster along with a meike 35mm t2.1 lense and I’m experiencing vignettes. It does reduce when I use digital stabilization in cam but I’m wondering if I’m doing something wrong. I’ve worked similar systems with Sony cameras and have never experienced vignettes unless using a wide angle lense

@Josh_Sattin

Жыл бұрын

I am assuming that you are using the S35 and not the full frame version of that lens. You need to use full frame EF lenses when using the speedbooster.

@decepticrom

Жыл бұрын

Oh boy.. thanks for the reply!

Josh I ended up trading in my micro 4/3 camera and ponying up $4,000 for a C70. All of my RF glass is way to cropped to shoot inside. I'm guessing I'm now going to have to buy EF with one of these speed boosters? Or is there a wide-angle lens I'm super 35 with autofocus I should look at?

@Josh_Sattin

Күн бұрын

Congrats on the C70! It depends on how wide you need. The Sigma 18-35 is my favorite S35 lens. There is also the Tokina Atx-i 11-20 2.8 which I've heard good things about.

@PizzlesTechTime

Күн бұрын

@@Josh_Sattin Thank you so much Josh as always. Very classic case gear addiction and overspending. I love my R5C even more Now that I got the C70 but I think together they will be unstoppable.

@Josh_Sattin

Күн бұрын

@@PizzlesTechTime You’re welcome. Great combo!

I have all RF lenses and the C70- Would I need to get EF lenses to use the speed booster??

@Josh_Sattin

Жыл бұрын

Yes, RF lenses don't work with the speedbooster. EF only.

very well explained. I forgot so much. Covid slowed my C70 usage :( Just remind me. My 24-70mm 2.8 RF is actually a 36mm-105mm in my C70 ?

@Josh_Sattin

Жыл бұрын

A 24-70 is always a 24-70 no matter which camera it is mounted on. If you want to get the full frame equivalent then the C70 has a 1.46x crop factor in DCI and 1.53x in UHD.

@laurencegrant2882

Жыл бұрын

@@Josh_Sattin Your loosing me now ! I thought my C70 was a crop sensor (not 35mm FF) So my 24-70 stays the same on C70?

@Josh_Sattin

Жыл бұрын

@@laurencegrant2882 If you are not using the speedbooster then multiply by the crop factor to get your full frame equivalent. The lens itself doesn’t change.

the way your tell your math is a bit weird ('cause you multiply the 0.71 buy the focal length or the lens and not by the cropped focal length with the s35 sensor which will be 75mm from a 50mm FF) but i finally understood. but i dont think its right to move the camera closer to subject because the frame you get with 50mm FF w/o the speedbooster is a cropped image, it its not a real 50mm but more like a 75mm ish.

@Josh_Sattin

Жыл бұрын

I would rewatch the video again. The sensor size does not change the focal length. A 50mm lens on a full frame or APSC camera is still a 50mm lens. When you add a focal reducer on to the lens, it changes the focal length of that lens, independent of the size of the sensor.

@glassworkscreative

Жыл бұрын

No, he is correct. A 24mm FF lens doesn’t become 17 with the speed booster. The speed booster negates the crop factor of the S35 sensor that normally would only use the center of the full frame lens, narrowing the angle of view, making a 24 something like 36mm in full frame equivalency for angle of view. The speed booster takes in the entire full frame lens’ light and focuses it down to the super 35 sensor giving you both your full 24mm focal length back and an extra stop of light (but not a stop less DOF). Your math is correct but the practical application of a speed booster isn’t. If you put a 50mm FF lens on the C70, it acts like a 75 in terms of field of view, the speed booster rectifies that back to 50.