If you really don't want to use PC and cloud for the transfer then you might try to connect your SLR via USB OTG cable to your N7.
Or the SLR's SD card via USB card reader and USB OTG cable to connect to your N7.
For to use USB OTG on an unrooted N7 you'll need the app 'Nexus Media Importer' from Play Store.
So your photos on the SLR's SD card will be readable on your N7 ... but truthfully, I don't know for sure if you can copy the photos.
Maybe worth a try.
I use a Transcend WiFiSD card in my camera. The associated app on my tablet makes it easy to transfer the files wirelessly. I use Photoshop Touch to do my editing once the files are there.