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ExposurePlot, the Exif Lens Length Analyzer - Reads exif info from jpeg files

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The program

ExposurePlot is a freeware utility that -for instance- shows a graph of the focal lens length you used in your photos. Shutter speeds, ISO's and apertures will be also presented in the graphs. Exposureplot reads only jpeg files, a file format that most digital cameras use or in some way can create besides the raw files.


 arrowExposurePlot 1.16 

Version 1.14 can be found at the version history


"Certainly saves money in the long run by not buying lenses I didn't need"

exposureplot screenprint 1 exposureplot screenprint 2 exposureplot screenprint 3 exposureplot screenprint 4 exposureplot screenprint 5 exposureplot screenprint 6

Shooting habits

The program might tell you more about your shooting habits than you realize. The gathered data can help you to decide what type of gear, camera or lens to purchase in the future.

You can find out which lens length you actually did use on that trip to the mountains, might save you some weight the next time.

First DSLR

Exposureplot can be a big help for upgraders from a compact zoom to a first DSLR, just let Exposureplot analyze the jpg files from your camera. Examine the graphs to find out the aperture and lens length you used most.



Exposureplot reads the exif data from jpeg files in a folder and creates graphs for lens length and other camera related tags like ISO and shutter speed. The program can search through subdirectories as well.

The filter can help you to get info from a specific camera. Just add Make and Model into the filter text fields, see the help in ExposurePlot for more info about this filter.

maker note

Note if you are using Wega2 than you don't need this program, ExposurePlot is available in Wega2.

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Most asked question:
Q: I don't have that lens length:
A: If you crop an image, some programs alter the focal lens tag in the EXIF, the e.g. 800mm you see could be a cropped image made with a shorter lens.

Version History

Version 1.1.6
Minor update for ExposurePlot, The equivalent file had some upper-lowercase errors and therefore could ignore sometimes added camera tags.

Version 1.1.5a
√Źn some rare cases the latest Exposureplot 1.0.5 did create a "None of the jpeg files contained EXIF info" error, it seems a problem with the navigation bar in some Windows versions, hopefully this minor update to 1.0.5.a will fix that, if you still have this error download version 114 or download Wega2 and use the ExposurePlot option from the tools menu.

Version 1.1.5
Compiled on Windows 7
Added the option to view jpg images in the path list (just as in Wega2, but not optimized)
Navigation/path panel adjustments for Windows 7.
Some minor bug fixes

Version 1.1.4  arrowDownload ExposurePlot 114 
Last version compiled on a Windows XP computer, use this one if you have troubles with higher versions
Added 35mm equivalent for the Olympus E- series
Minor bug fixes

Version 1.1.3
Maker Note filter added, in some cases this can help filtering on usable Maker Tags e.g. used lens type.

Version 1.1.2.c
Bug fix, read jpeg extensions now.

Version 1.1.2b
Minor update, ExposurePlot help file converted to html help, the help now works on Vista.

Version 1.1.2a
thm (thumbnail) extentions will now be treated as a jpeg file.

Version 1.1.2
Minor update - Tree panel lock fixed, dExif 1.0.3d implemented.Double click on status panel toggles mm modes

Latest dExif unit from Gerry McGuire implemented in this version
v1.0.3d - Bug fixes: fix the last fix! Oops!
v1.0.3c - Bug fixes: stop recursive EXIF directory entries
v1.0.3b - Bug fixes
* Fix problem with extended Canon tags being listed twice
* Fix comment problem with corrupting Digitizing Date Time
* Restore ClearSections( ) call

Version 1.1.1
Added option to use the real lens length, request from many users, easier to use, no need to enter 1:1 anymore ;-)
Added a small status window, shows type of analysing: 35mm equivalent - real length - calculating 35mm equivalent, the background color indicates if you need to reanalyse.
Some checkboxes where disabled at some point, this has been fixed.
Some minor bugfixes.

Version 1.1.0
Bugfixes 35mm equivalent from Olympus cameras supported again.
Equivalent file rename bug (cam_equiv.exp to cam_equiv.txt) at first install fixed.

Version 1.0.9
Added extract ISO values from maker tags "CCD ISO" or CCD SENSITIVITY (e.g. Canon G6/Casio).
Minor bugfixes.

Version 1.0.8
Option to add/customize cameras without 35mm equivalent info in the exif.

Version 1.0.7
Renamed to ExposurePlot
Charts overview added
New charts for ISO, Aperture and Shutter speed added.
Custom filter for camera make and model added, you now can filter for a specific camera or camera model.
Save charts to bmp format.
Focal mm, file path make and model now as text available.
Workaround for the unusual ISO location in the Exif with some Nikon DSLR cameras.
Supports now jpe extensions.

Version 1.0.6
Testversion (not released)

Version 1.0.5
Debug mode added.
Sometimes there seem to be unexpected results, by using Ctrl+D the debug mode becomes active, Focalplot will (after analyzing the folder) write or update the file fp_debug.txt to the program folder.
The lines in fp_debug.txt will have, steps value - exif equivalent value and path+filename
00034 - 35,00 mm - D:\images\img20333.JPG

Version 1.0.4
Olympus EXIF info, the 35mm equivalent is now calulated on a 43.2mm diagonal. Thanks to Frank Ledwon for his contribution.

Version 1.0.3
In some parts of the world Focalplot didn't show the correct lens length, they where two digits to long, this is fixed now. Some other improvements made.
Thanks David J Taylor for his advice.

version 1.0.2
Some language errors corrected.

version 1.0.1
Added an "always calculate" option, in the rare cases there are faults in the EXIF info.

version 1.0.0
First release


Windows 95/98/98SE XP Home/Professional Vista/Win7/Win8
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