More specifically, a file submitted uploaded from a Form?
Using a script in Workflow, you can use the resources found from this question on Stack Overflow to figure out how to do what you are asking.
http://stackoverflow.com/questions/58649/how-to-get-the-exif-data-from-a-file-using-c-sharp
If it came in through Forms then it is considered like any other document inside of Laserfiche.
Anyways, If you open in an image using a program that will tell you this information, you will be able to get that information. Otherwise, as far as I know, there is not other way inside of Laserfiche's Native Client
Yeah, I have a client that wants to use that as a token value in WF to be made available to other activities. I tried to tell them it was very unlikely, but thought I'd check here first!
This is not an impossible task at all. EXIF data exists inside the metadata of the image. If you read the technical information on wikipedia (http://en.wikipedia.org/wiki/Exchangeable_image_file_format) you may find that it points to the area of the metadata you need to find and should be able to be interpretted by a SDK script/script inside of workflow. You then could go ahead and store that into a custom metadata field of your choosing so it is accessible in the repository.
I personally would think that to allow there files to be used with another type of template besides a template for all image files, it may be best to have a workflow act on all files that have no searchable text (because its an image it should be mostly without text to find the majority of them) and if it contains no text then you have workflow fill the document text with the EXIF data for retrieval later and it would still be searchable inside the repository. This also would limit the amount of entries that do not have searchable text