I am scanning a large library of old photographs using Silverfast and a Nikon Coolscan V. Some files I scan into the Silverfast archive format '64bitBit HDRi RAW' so I can process them later.
I recently installed Lightroom to try it out to help with photo management . However, I have found it is corrupting the HDRi RAW files so that the dust and scratch application of Silverfast (iSRD) no longer works. All my archive files have been corrupted, I assume Lightroom has been doing a background search of all my photo's. This has cost me several hours of scanning work, I now must rescan the archive files.
In a search on line and I found one article which mentions Lightroom changing the file metadata and thhis causes a problem for Silverfast.
Has anyone come across this problem? Is there a solution?
I think these files are designed to be used in the Silverfast software. As I understand it they are not conventional raw files but unprocessed scans which can later be adjusted in Silverfast rather than doing everything at the time of scanning. I don’t use that scanning software personally but I’m guessing you would need to output a 16 bit tiff file for editing in Photoshop, Lightroom or ACR. Do Silverfast not have a support desk or help forum?
You are correct and I use Silverfast for processing their unique raw files. I installed Lightroom primarily for library management and editing of JPEG and ordinary TIFF files. What is really upsetting is that Lightroom appears to have scanned my entire hard drive in order to catalogue the files and in doing so corrupted the Silverfast raw files.
I have also contacted Silverfast to ask about this problem.
That probably isn't the case because Lightroom doesn't modify your files at all. Any changes made to images in Lightroom are stored in the catalog. Lightroom is a parametric editor which means that it does not directly modify the master images in any way.
I don't know if your issue is solved or not, but I wanted to report a similar problem here, so that user can be warned. I confirm that you should never edit or make any modification to silverfast raw files (HDRi) at all with anything else than Silverfast. Even changing the date attributes using Windows explorer (i.e. right-click / properties) will corrupt the file, I had several hundred scans that got corrupted that way and I was very angry a silverfast. The fact that just changing the date attribute on a file in Windows explorer is corrupting the file leads me to the explanation that Silverfast is the culprit and the only explanation I could find is that they are not using the TIFF file format in a standard way.
Concening your issue with Lightroom, my guess is that some metadata was written to the files and that created corruption. In Lightroom Classi there is a parameter in Edit/catalog settings -> Metadata wher is says "write data or time change in proprietary raw files" and if it's checked it may be that Lightroom is writing to your original files as soon as you chage a parameter.