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.
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.
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
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
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.
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.
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?
You are right i was looking for a comment and wanted to write the same thing. He forgot to add that. He makes it sound like you get 17mm which is not entirely true, it is only before accounting for the sensor readout.
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 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.
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.
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?
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.
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.
I enjoy watching your videos but unfortunately you calculate inaccurate. The sensor crop needs to be included in the mm otherwise people will think it is wider than it actually is misleading them. If you write 17 mm sensor crop not added it would be ok. But you give people a false impression when the actual focal length will be almost the same to a full frame, definitely not more.
