Finally, Zhong Yi Optics announced a speed booster (they are calling it Turbo Adapters) for Nikon mirrorless cameras. You can use this speed booster on the Nikon z50 camera as well as the Nikon z FC camera. They have announced three of them. So, now you can use your F-Mount lens as well as EF Lenses with DX Mirrorless cameras, the third one is for Mount42 (The M42 lens mount is a screw thread mounting standard for attaching lenses to 35 mm cameras, primarily single-lens reflex models. source wikipedia)
Now the big question is what the speed booster will do to your camera what new features will be present inside the speed booster
- One of the most important things is that it reduces the crop factor, so you can easily use your Nikon f Mount lenses with a DX mirrorless camera system without facing any crop. That’s great news.
Now I read it very clearly since it’s one of the most important features of any Speed booster that you will use in your DX mirrorless camera
- With the help of a new speed booster, you will get a clear one-stop aperture advantage with the lens you are using.
For example, you are using a 50mm 1.8 of mount lens in your DX mirrorless camera. While using the 50mm f 1.8 lens you will not face any 1.5 X crop factor. So, you will have a bit wider coverage and your camera will act as a full-frame camera since more light is getting into the sensor with the help of a speed booster. And not only that the resulting aperture will be reduced to f 1.4 to 1.2.
The only big issue is the speed booster doesn’t have AF contact pins, which means you will not able to use the autofocusing mechanism of your lens while using this speed booster. So you can work with the old age manual f Mount lenses very effectively year but unfortunately, the autofocusing mechanism will not work with the latest lenses.
Get Zhong Yi Optics Turbo Adapters for Nikon DX Mirrorless from B&H Store | Amazon.com
[With the help of a new speed booster, you will get a clear one-stop aperture advantage with the lens you are using.]
Yes, but not by making the lens aperture faster, as that is physically impossible. A f1.8 lens do not become an f1.4 or f1.2 lens by slapping a speedbooster on it. Neither will it transmit as much light as those apertures.
A f1.8 lens is a f1.8 lens, as the aperture is determent by how much light can pass through the lens, no matter how many speedboostes you put behind it.
What happens is, is that if you have a lens designed for FF it projects the light that enters it, in a circle which is wide enough to cover the whole frame of an FF sensor (24x36mm).
If you put it on a crop sensor camera, like an APS-C, that have a smaller sensor (like 23.5×15.6mm), the lens will still project an image circle big enough to cover the FF sensor.
This means that a lot of the light exiting the lens does not hit the smaller sensor on an APS-C camera and is therefore waisted.
A speed booster contains an optical element, which take that big image circle of the FF lens and project it down to the size of the APS-c sensor. All the waisted light is now hitting the sensor too.
This waisted light amounts to roughly 1 stop.
Thanks so much for sharing this information.
But while using Metbones speed booster you literally get a stop more aperture advantage
How Does a Speedbooster Work ?
https://youtu.be/aPIoVuerdcM
Why we see change in aperture value
For example is your will use a Canon 50mm F1.8 lens with metabones speed booster on M50 Camera the resulting MAX aperture you will get F1.2
1.2 (resulting aperture) X 1.6 (crop factor) = 1.9 [Approx]