The museum I work for as a photographer, does in fact "archive" photographs that are/have been produced by the museum staff over the years. This mainly happened as a result of the earlier images being produced, and cataloged in as accessioned items to keep track of them--from the late 1800s to the 1970s it was this way. The various photo dept's since then, set up an archive of sorts, of the record shots on 4x5 having the same accession numbers as the artifacts, so in a sense these are "archived" as well. The other types of photos produced are kept as longterm records also, and are under the record retention type rules as well. These earlier photos run into the tens of thousands and are actually stored in the artifact storage rooms. They are legally accessioned as "artifacts".
In archives--usually besides the paper items, the bulk of the holdings will actually be in the "reformatted"--copywork--materials. Either microfilm or sheet film. On a daily basis, this is where books, newspapers, photos etc are copied onto film and that is what is "archived". The same is true for libraries, where they look more at distribution of copies of the images over the one "artifact". An original in one of these three situations might be put in storage and/or displayed, it might be copied and then the original stored, or it might be copied & the original gotten rid of somehow.
The choices we make for film or digital really come down to how the final thing will be used or reproduced. In some ways, it's still better to shoot 4x5 film, because with most digital cameras besides the high end scanning backs, you can't just shoot once & file it away. Interpolation becomes a real issue when you deal with having to output exhibit graphics at very large sizes. Sometimes all you get is a digital image to work with though--and you have to make do. I had to get a file printed 100% at 300 dpi once, and then shoot it on a 4x5 camera on chrome film--drum scan that and have a 4x6 foot lighjet made. The original file at 300 dpi was smaller than a 4x5 sheet. Not great to work with, but such is life with digital cameras being used in the real world to make images now. Recently we shot a 15th century map on 4x5 and had that drum scanned for a large graphic--the final file was over a gig in size. I also did some banners that were 12-16 feet tall, that required us to shoot copynegs & make prints for drum scans because the files were so large. We also had to make cibachromes off 35mm slides & drum scan those for this project as well. One reason for that was that the originals were all "archived" in that they couldn't leave the premises--the labs doing the output were outside, so some sort of either scan or hard copy had to be sent in lieu of the "artifacts". It's these "legacy" type files that are found in collections that are very hard to deal with.
Another thing we shoot quite a bit of are large textiles like quilts and flags. The flags can be very large, 20 feet or more in length, and these really need to be shot on 4x5 or larger film. The flags are often shot either before conservation or after, or both. They're often very fragile--will be shot only once and then stored. So, this is an example of where you need to do the best you can right then, or else you'll have to live with whatever images you get for a very long time. I can see a similar parallel to shooting lower res digital images for record shots--this is something that happens with digitization projects, because if you shoot for access only, you can't use those files for reproduction. Or if you shoot a baseline resolution too small, you're restricted in final ouput size as well.
The two approaches are to shoot a lot of images quickly, at lower resolutions for thumbnail access , or to shoot for a standardized baseline resolution as the master file, usually always an unsharpened TIFF. The access files then fall into different ranges under the master. When you shoot for the master files/access type project--takes a lot of file space. It's this type of digitization project that one would be able to market services probably to smaller museums without photographers. The other type of project would be that around digitization of a certain collection as a way to make it more accessible.
An extreme example for me would be a project we worked on several years ago--the originals were these large paintings done on canvas that were very long and rolled up. they have a 3D element in puppetry and all sorts of weird little things like that. There are like 60-70 panels, in sizes of 6x13 feet or so, on rolls--they're so fragile right now, the conservators estimated they couldn't be tilted anymore than 10 degrees. So it became a massive overhead, copystand job. The museum made a structure to support and unroll these for a conservation assesment, that had a proposed scaffold built over the top with a 4x5 camera on it as well as grid of speedotrons. Underneath, was a bellyboard type system that would allow conservators to move out over the top to work on the paintings, without actually touching them. The whole project became very expensive--and as a result it never happened. There are only 2 other known examples of this type of artwork in the US--one other museum had used disposable cameras for theirs, by standing off to one side & shooting them. At our museum, we were charged with making 1:1 reproductions of these, so the minimum size we could use would have been 4x5. 8x10 would have been better. Now it's a moot point--but if we do this in the future, this will be a place where a scanning back might be applicable.
That's probably an extreme example, but I wanted to share some of the different things museum photographers actually do. As to what they require--think of it in terms of commercial photography and labwork when it comes to physical exhibitry. If it's online only, then the requirements might actually be more in the realm of multimedia work to be honest. Immersive imaging, shooting objects in the round etc.
Hope this makes some sense, good luck at any rate.
K Thompson
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