That would be normal when you have a file with a "significant usage of eps images throughout the documents." That usually mean vector graphics which can't be significantly compressed.
You'd have to go into the program that created the EPS files (probably Illustrator) and rasterize the vector graphics at low resolution.
Where do these EPS files come from Photoshop or Illustrator?
There may be nothing wrong with EPS files technically, they are considered archaic in a modern workflow. Best to save as a .ai with pdf compatible file - or to save them as PDF x4a with Illustrator Editing Capabilities enabled.
But I don't think there's any need to run out and convert all your files - perhaps keep it in mind going forward.
EPS is really not the best format. If it's pure raster then PSD or TIFF would be preferred format, if it's Raster + Vector Shapes, Vector Masks, Text Layers then PDF is preferred over EPS (with photoshop editing capabilities enabled).
File sizes react differently depending on the content on the choice of compression. Heavy Vector files from Illustrator can cause Huge file sizes in PDFs.
See this article (and more importantly the comments!)
If you can provide a bit more info on your workflow and what settings you are using to save it would be great.
Vector EPS files can be very complicated or very simple. There’s really no way to answer your question since each file will be different.
That said, everyone has their own opinion of what size a file should be and you haven’t told us what your requirements are.
Hi Steve, would the option to export as an eBook work here - where they can select PNG for file formats.
They can then relink the images to the PNG folder output by the eBook?
It would be worth trying. It would require making the setting to keep the images at original dimensions, and they would have to expand the EPUB, and know where to find the PNGs. Unfortunately, they are not numbered in any logical way and in a large document might be hard to match to the original.
ah - I thought it would name the image the same as before.
Probably best to batch process them in Photoshop - then relink via folder.