Not Block 50, but I thought I'd share some nice F-16 pictures:
F-16C Block-52+ 'Zeus' by Bas Weijers, on Flickr
F-16AM RNLAF passing Volkel Tower by Bas Weijers, on Flickr
Flare Display by Bas Weijers, on Flickr
In the clouds by Bas Weijers, on Flickr
Light the fires by Bas Weijers, on Flickr
F-16AM Static by Bas Weijers, on Flickr