KRL-06S +23 "Kraken Pro Series"

Lens Construction: 5 elements, 3 groups
Compatible Camera (Up To) Sensor Size: 36mm x 24mm (135mm Full Frame)
Camera Lens: 60mm-105mm
Diopter(Underwater Focal Length): +23 (43.48mm)
Working Distance: 27mm-36mm (from front of lens) 
Max Magnification: x4.2 (Area Ratio x17.64) with 105mm F2.8 macro lens
Glass/Coating: Optical glass/multi layer BBAR coating
Lens Barrel: Aluminum w/ type II anodizing
Mounting Thread: 67mm
Dimensions: ~71.7x60.3mm 
Weight (air): 593g 
Weight (water): 379g 
Depth Rating: 197ft (60m)

Below sample images are shot by Erik Lukas in Lembeh with the +23 on a Canon 5D MKIII + 100mm lens