The underwater focal length is 90mm (+11 diopter) with high magnification. The maximum shooting magnification at the shortest distance is approximately 2.23x (4.98x area ratio) when using a 100mm class macro lens for full-size SLR cameras.
This lens increases the magnification of your subject by shortening the shortest shooting distance. The magnification effect is not possible on cameras with extremely short shortest shooting distance.
High magnification, yet ensures a long working distance that is not previously used. Working distance at the shortest shooting distance is 69mm than the subject side lens face of this lens when using a 100mm class macro lens for full-size SLR cameras.
Combined with a compact outer diameter, it allows the light of strobe and light to rotate across the subject, even at the shortest shooting distance.
Designed specifically for underwater use, it compensates for aberrations throughout the entire focus and achieves high contrast and crisp images regardless of the shooting distance.
(*4) This is an underwater lens designed specifically for underwater optics. The image will not expand even if you use this lens on land, causing distortions and vignetting around the screen.
The use of high-refractive glass makes it compatible with a wide range of 100mm macro lenses for a compact but large aperture full-size SLR cameras to compact digital cameras. The compact lens body allows for greater freedom of writing and contributes to a variety of expression.
3 lens configurations in 2 groups. Chromatic aberration correction lens (Achromatic lens) is used inside to correct chromatic aberration. Additionally, a non-reflective coating is applied throughout the lens to reduce flare/ghosting throughout the optics.
By screwing the lens outer thread option, the lens adapter ring for UCL-67/90 can be added to the ION M67 close-up lens "UCL-165M67" and "UCL-330" can be added to the lens circumference. It also supports even higher magnification shooting.