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The Sigma 14mm f/1.8 ART ...
#12
The f/1.8 makes a huge difference. Even at 3...5 metres away the DoF is not deep. And the higher the resolution the more a100% view shows missed focus although it doesn't look too bad at first look.


I was thinking about the focus abilities in artificial light. All of them do have kind of a frequency, be it 50 or 60 Hz or higher for fluorescent lamps (up to 200 Hz, I think). If the cameras refresh rate for the AF-module comes close to such a frequency or even synchronizes with, the worst what could happen is the camera only switches AF when the light also goes dark. The flicker reduction setting made me think about this frequency thing, but I don't know if the impact is big.
  


Messages In This Thread
The Sigma 14mm f/1.8 ART ... - by Klaus - 11-04-2017, 01:53 AM
The Sigma 14mm f/1.8 ART ... - by Klaus - 11-06-2017, 12:44 AM
The Sigma 14mm f/1.8 ART ... - by Brightcolours - 11-06-2017, 06:26 AM
The Sigma 14mm f/1.8 ART ... - by Klaus - 11-06-2017, 08:13 AM
The Sigma 14mm f/1.8 ART ... - by davidmanze - 11-06-2017, 09:24 AM
The Sigma 14mm f/1.8 ART ... - by JJ_SO - 11-06-2017, 09:53 AM
The Sigma 14mm f/1.8 ART ... - by Brightcolours - 11-06-2017, 10:00 AM
The Sigma 14mm f/1.8 ART ... - by davidmanze - 11-06-2017, 10:15 AM
The Sigma 14mm f/1.8 ART ... - by Klaus - 11-06-2017, 11:11 AM
The Sigma 14mm f/1.8 ART ... - by JJ_SO - 11-06-2017, 11:30 AM
The Sigma 14mm f/1.8 ART ... - by Brightcolours - 11-06-2017, 12:41 PM
The Sigma 14mm f/1.8 ART ... - by JJ_SO - 11-06-2017, 01:40 PM
The Sigma 14mm f/1.8 ART ... - by Rover - 11-06-2017, 03:25 PM
The Sigma 14mm f/1.8 ART ... - by wim - 11-07-2017, 12:53 AM
The Sigma 14mm f/1.8 ART ... - by Rover - 11-07-2017, 07:56 AM
The Sigma 14mm f/1.8 ART ... - by JJ_SO - 11-07-2017, 08:30 AM
The Sigma 14mm f/1.8 ART ... - by Brightcolours - 11-07-2017, 09:24 AM
The Sigma 14mm f/1.8 ART ... - by Rover - 11-07-2017, 05:27 PM
The Sigma 14mm f/1.8 ART ... - by JJ_SO - 11-07-2017, 06:02 PM

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