Time in File Header

[smithn00]

Is the date/time recorded in the image header exposure start of midpoint?

 

TIA

[admin]

Is the date/time recorded in the image header exposure start of midpoint?

 

TIA

 

What do you mean by midpoint?

[astroman133]

Ned,

 

The timestamp in the file name for an image was never any kind of midpoint, whatever your definition.  In 3.1.3 it is the time when the exposure started, but in previous versions of BYE it was based on the time, at the end of the image capture process, that the image file was created.

[smithn00]

By "midpoint" i mean the midpoint of the exposure.

I am not referring to the time stamp in the file name but to theDate/Time line in the RAW file data.

[admin]

Hi Ned,

 

It as Rick said in his post.  In 3.1.3 the date/time stamp is taken at the start of the exposure. 

 

In all previous version before that it was taken at the end of the exposure.

 

Hope this helps,

[smithn00]

I must not be explaining myself clearly.

The camera creates a multi line "header" attached to each image.  It contains lots of information about the camera and its state at the time the image was taken.  DPP calls it Shooting Time.  I would just take a long exposure and note the time and compare it to the header but I don't have the camera handy.

[admin]

Oh, the exif data.  All of that information is coming from the camera... except for the fields that starts with Backyard, I put those in.

 

The Shooting Time value is most likely based on the in-camera date/time.

 

Regards,

[astroman133]

Ned,

 

If I understand you correctly, the parameters that you are talking about is the EXIF data. You can look at the EXIF data for an image in BYE in Preview Mode by clicking on the "cube" button that is just to the right of the previewed image. BYE adds several parameters, but the name indicates that the data was written by BYE.  The rest of the parameters are written by the camera.  There are several date/time parameters among the values that are written by the camera.  Of course they are based on the camera's clock date/time.

 

None of them is called "Shooting Time".

 

Since I have never really been concerned with them, I can't tell you off the top of my head how those times relate to the start or end of the exposure.

 

Your best bet is to take some test images, look at the EXIF data and compare them to the camera's time.

[s3igell]

Also be aware that all Image Catalog Apps and Image Processing Apps have their own routines for handling EXIF Data, and many of these Apps can actually be Installed as the Source from which Windows gets its Data when displaying the Images.  (Actually, the Apps usually offer to be Registered as a Plug-In which will seamlessly Take Over the Display Function whenever Windows needs to display a Thumbnail or EXIF Data - meaning that it isn't even Windows that is doing the Displaying...)

 

So, the data which you are referencing could even be labeled with a name like "Shooting Time" by the Plugin - all without anything specific on BYE's or Window's part...

 

The best thing to do is to become more familiar with the EXIF Data contents - BYE's "Cube" EXIF Display is a good Utility that doesn't inject any "labeling changes".  And also to be aware of the Apps you have Installed on your PC, and the Capabilities and Permissions that you've allowed them...