All guests at your event use their camera app to 

• Take lots of photos of your event
• Save the photo to their own device
• Save to your event's website
• See them live on the big screen slide show as taken
• View them later

During the event

Slide show

Create a QR code for your event so guests use their own cameras to send to your site, and big screen slideshow. 
They will have a copy of their own photos saved to their camera.

Don't worry the show will not be on big screen BUT anyone with a device connecter to the web can view the slide show. A second QR code is used for access.  Off venue friends can view the slide show any where in the world live. 

During and after the event you can access and manage the photos in your own gallery.
Anyone can view the slideshow. any time or any where if you provide them with your gallery web address
They can
Download photos.
Share on social media or send by email