Presolicitation: Hyperspectral imaging spectrograph based on the dyson design or other proven design operating at a very low (fast) f-number
In summary, the basic ingredients to creating starbursts are the following: a) a high f-number
(typically between f/11 and f/22); b) some object that blocks the sun (for example) partially; c) some darker object that creates a background for the starbursts to really come out in your photo; and d) a wide-angle lens.
The EF-mount design of Canon's Cinema prime lenses supports communication between camera and lens, enabling features such as display of the f-number
in the viewfinder, recording of lens metadata, and Peripheral Illumination Correction.
An exposure value (EV) is to combine a shutter speed and an f-number
to be the same exposure .
The book includes an extensive list of symbols and an appendix on f-number
There is in fact a further complication, as we have to work with inverses: the larger the f-number
, the smaller the aperture, but this need not concern us here.
2) Approximately twice as sensitive as a conventional front-illuminated CMOS image sensor by combining back-illuminated CMOS image sensor and bright lens with small f-number
The ratio of focal length to diameter of the mirror is typically referred to as the f-number