35mm f/0.9 | Tested and Explained: Physics of Speed Booster and Crop Factoring

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Link to the previous video:
   • f/0.9 For $350? - FD To E Mount Speed...  

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Note:
*The speed booster is currently unavailable for DSLR cameras due to the flange distance.
The lens opening is determined by the opening of the iris inside of the lens, not by the front element.
In the tests, I should have compensated for the concentration in light with ISO. This explains why the speed booster setup gave a brighter image than other setups in these settings.
We usually use the diagonal measurement to compare sensor size.


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