When I convert a scanned PDF to DWF the file size balloons as much as 5 times. Whether I print to DWF using the DWF writer for 2D printer driver or open the PDF in Design Review 2013 and save as DWF or DWFx makes no difference.
Is there a better way or are we stuck with multimegabyte files when I could stick with PDF and keep it under 1Mb per file?
There is no relationshhip between those file types: it's content and your output (and perhaps even the lackluster driver being used to create the other format) that controls files sizes.
Scanned PDFs are a huge collection of points (your drawing plus "noise". DWF triesd to create Vector files, so each point is actually a point, taking up code space in the file definition. A billion points bulk up file size more than one continous line of the same length.
My understanding of the DWF format is that it is based on the ISO 29500 Open Document format which is basically a ZIP file collection of objects which can include graphics such as PNG, BMP, etc. Seems to me a PDF to DWF conversion would be mostly just a repackaging, not something requiring a 5:1 size expansion, Are you saying it is really trying to convert raster data to vector? Are the PDF graphics being converted to a graphics memory hog format like BMP instead of something more efficient like PNG? If so then I'll just stick with PDF. I had hoped I could use DWF to leverage the built in markup capabilities of Vault and Design Review without having to switch to Acrobat during change order reviews.