ColorBox + Loupe Demonstration

Without loupe (width and height at 25% to force scaling)

Grouped Photo 1

Grouped Photo 2

Grouped Photo 3

With loupe (width and height at 25% to force scaling)

Grouped Photo 1

Grouped Photo 2

Grouped Photo 3

With loupe (but since images are already full size, the loupe will not be called)

Grouped Photo 1

Grouped Photo 2

Grouped Photo 3