Can be attached on a housing/lens port equipped with standard M67 screw mount

“XD Mount" for one-touch lens attachment and removal
The newly developed "XD Mount" enables one-touch lens attachment and removal. The "XD Mount" on a lens provides high durability, thin design without compromising lens optical performance and speedy lens attachment/removal in combination with XD Mount on housing side which has reasonable price and anti-slip lock function.
 
Features
The UCL-67 XD underwater close-up lens is designed to deliver high magnification yet superior image quality best suited to full frame SLR macro lenses of focal length 60mm - 100mm with comfortable long working distance enabling easy lighting. The lens also supports mirrorless as well as compact system.
 

Compatible Lens
A telephoto macro lens with a minimum focus distance longer than 20cm is recommended (*1)(*2)
Using short minimum focus distance lenses will reduce the magnification.

(*1) Vignetting may be observed depends on the distance between master lens and lens port glass and/or UCL-67 and lens port glass.

(*2) Only usable when the focal length is between 60mm and 100mm range at 35mm film equivalent. Beyond this range, there will be vignetting at the wide side and deteriorated image quality at the telephoto side.
 
Powerful magnification with underwater focal length 67mm (+15 diopter). Maximum magnification of the UCL-67 with range of 100mm macro lens for full frame SLR is 2.76x (area ratio: 7.65x) at the minimum focusing distance. (*3)
 
While the UCL-67 delivers high magnification, it still offers long working distance. When using with 100mm range macro lens for SLR, working distance is 52mm (83.4mm from housing port surface) at minimum focusing distance (*3).
Together with its compact size, the lens supports friendly lighting even at minimum focusing distance.

(*3) When using for AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED.