DPI and BitDepth Settings in SDK

[BeckoningEagle]

I am using the following settings:

var options = new ScanOptions
{
AutoDeskew = true,
BitDepth = bitDepth,
Device = device,
Dpi = 200,
Driver = Driver.Wia,
PageSize = PGSize,
PaperSource = PPSource
};

Where bitDepth = BitDepth.Greyscale
PGSize = PageSize.Letter
and
PPSource = PaperSource.Feeder

When I scan it, the file created are 100dpi and 24bit depth. The image is Greyscale, but the actual bitDepth is 24 instead of 8. Am I doing something particularly wrong?

This is the actual scan part:

        //Scan the document
        var images = new List<ProcessedImage>();
        await foreach (var image in controller.Scan(options))
        {
            images.Add(image);
        }

        //Export the scanned document to PDF
        var pdfExporter = new PdfExporter(scnContext);
        await pdfExporter.Export(Path.Combine(txtbxSaveFolder.Text.Trim(), "ScannedDoc.pdf"), images);
    }

[cyanfish]

The scanner or WIA driver might not support 200dpi (see GetCaps). Grayscale JPEGs aren't generally supported in PDFs so they'll be encoded as 24 bit.