View Full Version : Exposure in Minus Values?!??! Wat it means?

March 7, 2009, 07:48:41
dear all,

im using DFx 41AF02 camera. Normally the Exposure Settings comes line 1/32, 64, etc., but in my system its Showing in Negative (from -13 to +5).

wta does it means? its got changed suddenly..

please let me.

Thanks in Advance..


Stefan Geissler
March 9, 2009, 11:04:43
Hello Abdul,

There are three different interfaces for exposure available:

Register values:
From 4000 to 1, where the exposure time is calculated as 1/n = seconds, e.g. n=30 => 1/30 seconds
The register values may differ from manufacturers. The Sony camera's register values have a
completely different meaning, than our cameras.

Physical values:
-11 to 4, where the exposure time is calculated as 2^n = seconds, e.g n=-6 =>2^-6 = 1/64 seconds

Absolute values:
This is the interface with the widest range from 0.0001 to 30.0, resp. 0.0001 to 3600.0 for the
astronomy cameras. The exposure time is give as float value, e.g 0.3333 = 1/33 seconds.

You see the physical values interface.