Canon C70 Speedbooster - Everything You Need to Know
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- Опубликовано: 11 июл 2024
- The 0.71X Focal Reducer from Canon is an incredible piece of equipment. Learn about how focal reducers work in terms of focal lengths, aperture, entrance pupil diameter, light transmission, depth of field, compatible lenses and misconceptions.
Canon 0.71x Focal Reducer - geni.us/bGG7U7X
A Problem with the Speedbooster Video - • A Problem with the Can...
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CAMERA GEAR:
Canon C70 - geni.us/kV6qgk
Canon R5 - geni.us/HxMj
Canon RF 15-35 2.8 - geni.us/IO46It
Canon RF 24-70 2.8 - geni.us/TtRw
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Table of Contents
0:00 - Intro
0:37 - How Speedboosters Work
3:11 - Light Transmission
4:27 - Depth of Field
7:34 - Crop Factor
8:22 - Which Lenses Work
9:12 - Image Quality
11:25 - Build Quality
12:29 - The Pros
14:09 - The Cons
15:36 - Conclusion
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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.
Brilliant video as usual.thanks
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.
FANTASTIC video dude! Hopefully RUclips recommends this video for every speedbooster search because this is the best on the topic yet!
Thanks Tyler! I hope so too!
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.
Glad to hear that this video was helpful for you. Thanks for watching!
Excellent summary. Really nicely produced video! Subbed, keep it up!
Thank you!
I ended up finding a great deal on an open box cannon speed booster for my C70. I'm trying to figure out the best lens to get for shooting myself indoors
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!
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.
@@Josh_SattinWon’t the speedbooster decrease sharpness and increase abberations?
Excellently explained problematic with clear examples. Canon EF 85mm f/1.4 IS USM must be extraordinary with such accessory.
85 f/1.4 reduced would be a 60mm f/1.0 so yeah it'd be pretty insane.
I wonder if a Matt box would have stopped the purple dot in the sample you showed. Have you gone RF? Thanks Josh
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!
How about the metabomes rf-ef speed booster? They have way more experience making focal reducers and have a great reputation with their optics.
you mention another adapter, is that a standard Eos R ef-Rf adapter like $120? i thought is didn't fit
I hope this works on the r7
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?
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?
Thank you. I personally have not tested that lens so I can't say for certain.
@@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?
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?
Thanks. Unfortunately you can only use this on a RF mount camera. The C200 has an EF mount.
@@Josh_Sattin There is a Ef To Rf lenses for C200?
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.
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.
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 ?
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.
@@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?
@@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.
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?
I’m interested in this too with the 70-2002.8 ii and 400/5.6
Seria possível em câmeras aps-c como R7???
Would it be possible on aps-c cameras like R7??
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?
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.
@@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.
@@PizzlesTechTime You’re welcome. Great combo!
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
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.
Oh boy.. thanks for the reply!
I have all RF lenses and the C70- Would I need to get EF lenses to use the speed booster??
Yes, RF lenses don't work with the speedbooster. EF only.
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.
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.
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.