This is an instruction manual for Olympus lens ED90-250mm f2.8.
The document is a user guide for the Olympus ED90-250mm f/2.8 lens, designed exclusively for use with Olympus Four Thirds single-lens-reflex digital cameras. It details features such as dustproof and drip-proof construction, high imaging capability with three ED elements, and compatibility with optional teleconverters and extension tubes under specific conditions.
The guide covers practical usage instructions including attaching the lens strap, hood (LH-120B), and protection filter, as well as operating the focus limit switch and four focus stop buttons to control autofocus ranges. It also includes safety warnings regarding sun exposure and handling precautions before listing main specifications.
| Mount Type | Four Thirds mount |
|---|---|
| Lens Configuration | 12 groups, 17 elements |
| Iris Control Range | f/2.8 to f/22 |
| Shooting Range | 12.5 m (8.3 ft) to infinity |
| Focus Adjustment | AF/MF switching |
| Dimensions | Max. dia. 83 mm x Overall length 276 mm |
Yes, it can be used in combination with the optional EC-14 teleconverter.
Yes, it can be used with the optional EX-25 extension tube under specific magnification conditions.
No, this lens cannot be used in combination with the Olympus Macro Flash System.