Nauticam Mid-range Focus Optimizer 1 (MFO-1)
Nauticam's Mid-range Focus Optimizer is designed with several objectives in mind: first, it eliminates the focus hunting that plagues many macro lenses by limiting the focusing range to infinity, allowing the lens to lock onto subjects more quickly and consistently. Second, it provides a small magnification bump for those subjects that are just a bit too small to fill the frame, even when shooting at 1:1. Third, it improves overall image quality by minimizing aberrations and correcting some of the optical problems that arise when shooting underwater through a flat port.
Together, these improvements make the MFO-1 a indispensible tool for achieving faster, more reliable focusing, greater subject magnification, and sharper, cleaner macro images underwater.


© Matthew Sullivan
Compatibility Chart

Mid-range Focus Optimizer 1 (MFO-10 Specifications
| Dimensions |
OD 70mm x H 26mm |
| Weight in air |
218g |
| Buoyancy in water |
Negative 150g |
| Magnification (*1) |
1.2x |
| Working Distance (*1) |
12.5cm - 114cm |
| Body Construction |
Hard-anodized aluminum alloy |
| Lens construction |
3 elements in 2 groups |
| Lens Coatings |
Anti-reflection coating |
| Mount thread diameter |
M67 |
| Depth rating |
100m |
*1 Tested with Nikon AF-S VR Micro-NIKKOR 105mm f/2.8G IF-ED