EXIF data - Why is so much is missing in LRx but in RAW / DNG / CR2 images

Question

I've seen the limitations in the EXIF data as shown in LR. I've seen the comments that it would be SO useful to sort / filter by all the EXIF data available in LR.
However LR shows a small proportion of the information that is available in the Meta data but there is missing EXIF data, that is of use to users, not every day, but it is there and with the aforementioned improvement of searching / sorting / grouping / stacking, I'd like this data to be accessible.
I was looking to find all the correctly exposed images in sets of 3 auto bracketted images -2, 0, +2 from todays shoot but this info is not listed in LR
So I looked in PhotoGrok, and it told me that the image I was looking at was AEBBracketValue -2, ie 2 stops under exposed in a set of auto bracket.
It also told me my camera was 37º when I was shooting in Cape Town this morning. It most certainly was not that warm outside.
My reason for finding the correctly exposed images in the sets was to see if they had sufficient exposure data to be used as one image rather than combining the 3 bracketted images using fusion / enBlend software to rescue the shadow detail and highlight detail in my shoot.
If you do play with PhotoGrok, you see more info than may be / is / could possibly be useful. But it does list a great deal.
I do get the basics
exposure
aperture
focal length
35mm equivalent
focal distance
hyperfocal distance
colour balance
AEBBracketValue
and the list goes on.
More importantly, this data has been extracted by LR from Canon 5DII CR2 files to DNG, so LR can see all this info.
Anyway, that is my request.
There is limited EXIF data displayed in LR, there are requests for sorting / searching / listing / stacking by more of the meta data that LR accesses.
I would like to see much more of this data available to be sorted / searched / stacked, so I can find amongst all the EXIF data, the AEBBracketValue = 0, ie correctly exposed images.
Rob Cole  - Does your anyfilter access more of this info?
Hillrdg- you asked me to give my motivations for making suggestions, so I''ve taken your advise on board and to substantiate my argument.
yes, there is a workaround - It is to sort all the photos by capture time or file number and arrange them into 3 images in a grid view and just select the correct column, but this is slow. More importantly, this request is about vastly improving access to EXIF data and for other uses of the vast amount of EXIF data available in images.
hamish NIVEN Photography

Answer 1

EricInsalaco wrote:
Now I was under the impression Preview/Versions only take up a miniscule space on the HD since they don't FULLY copy the master file, they more create a bridge between the two that amounts to a few MB. Is it possible that it's taking up a much larger amount than intended here (a la the same basic mail attachment problem, but with Preview)? If so, what directory would that be located in?
Apple's documentation on Versions and what is kept in the Versions database is misleading, in my experience, though others will argue to the contrary.
In any case, all the Versions files and the database that keeps track of them are in an invisible folder in the root directory called
.DocumentRevisions-V100
The easiset way to check its size is to show invisible files by pasting the following command in Terminal:
defaults write com.apple.finder AppleShowAllFiles TRUE; killall Finder
press 'return' on the keyboard.
Now navigate to the hard disk in Finder and you should see DocumentRevisions and its size.
To turn off invisible files, use the same command as above but replace TRUE with FALSE.
Message was edited by: softwater