Luminous Landscape Forum

Raw & Post Processing, Printing => Digital Image Processing => Topic started by: Chris_Brown on February 17, 2011, 08:43:05 pm

Title: Sub-second Time
Post by: Chris_Brown on February 17, 2011, 08:43:05 pm

In the EXIF data of my files there's a parameter called "Sub-second Time", "Sub-second Time Digitized" and "Sub-second Time Original". What are these parameters? Can they be changed? If so, how does that affect the image?

Title: Re: Sub-second Time
Post by: Gary Brown on February 17, 2011, 09:23:13 pm

They hold fractions of a second for each of the corresponding date/time fields.

Title: Re: Sub-second Time
Post by: howardm on February 17, 2011, 11:02:11 pm

they are defined in the EXIF standard but I dont recall ever seeing them actually used (ie. filled in) by the camera

Title: Re: Sub-second Time
Post by: Chris_Brown on February 18, 2011, 05:37:43 pm

Quote from: Gary Brown on February 17, 2011, 09:23:13 pm

They hold fractions of a second for each of the corresponding date/time fields.

???

Title: Re: Sub-second Time
Post by: John.Murray on February 20, 2011, 10:27:44 pm

Chris:  Many cameras are now capable of shooting multiple exposures per second - the date/time fields in the original exif specification only went to seconds.

http://www.exif.org/Exif2-2.PDF

A big document -  at the end are recommendations for what can (should) and cannot be changed