INON LENS MACRO +3
Highly versatile screw type "M67 Mount" compatible.
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The UCL-330 is close-up lens providing 330mm focal length (+3 diopter) where shooting distance is 330mm from lens surface when camera’s focus position is set to infinity, which is half power of the UCL-165M67. Especially useful for super zoom digital camera when shooting a shy subject with best suited distance and magnification.
The lens is constructed of two plano-convex high quality optical glass elements with inner coating to suppress optical aberrations more effectively comparing to a lens using just one double-convex element, and bring out optimal performance of combined master lens.
The lens body has screw mount on its front end to stack other UCL-330 for even higher magnification macro imaging. Off course the UCL-165M67 can be stacked as well for further close-up shooting. The threaded part has a slit to drain water from gap between two lenses to easily separate combined lens underwater.
More information
Inon's own site [here]