windows 7 - Trying to package a directory of images into a pdf

I have large image directories that I want to quickly package into a single pdf for portability across pretty much all devices. Following the instructions of other questions I have tried a variety of tools in conjunction with cutePDF to unsatisfactory results. I need a solution that:

• I can quickly tag a directory as the source of images


• The images are in alphabetical order by filename.


• The pages of the pdf are the size of the images. This is the biggest issue, pretty much everything I try shoves the images into a standard paper size. It either crops or shrinks it to fit, regardless of size, ratio, or orientation of the image.

Any thoughts? It will need to work on win 7.