transliterating:

The lighting is hard and full of contrasts. There is nothing - or very little ***progression*** in the focusing.

consulted links:

David Busch's Sony Alpha NEX-7 Guide to Digital Photography
https://books.google.com/books?isbn=1133601340
David D. Busch - 2013 - ‎PHOTOGRAPHY
Focus Pocus Although some cameras added autofocus capabilities in the 1980s, ... gadgets were often used to help the photographer achieve correct focus. ... ***to remember the progression perfectly, so that autofocus can lock in much more*** ...

Making Sense of the Odd Progression of the F-Stop Scale?
www.school-of-digital-photography.com/.../making-sense-of-t...
Nov 26, 2013 - ***Camera lenses are marked with f/stop numbers that work in stop values where numbers in the progression represent doubles and halves***. ... In photography, infinity focus is when the lens forms a sharp image of an object.

re:-- ***Manual Control Progression***: Canon PowerShot Talk Forum ...
www.dpreview.com/forums/post/27534633
HenryUK wrote: ***Old manual film cameras had both manual setting of exposure and focus***. The dedicated shutter speed dial and aperture ring made setting quick ...

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Note added at 3 hrs (2015-07-23 20:03:10 GMT)
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f-number - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/F-number
In photography, stops are also a unit used to quantify ratios of light or exposure, ..... A practical example of this is, that when focusing closer, the lens' effective ...