Targeting birds at a distance with OM-1 Mark II.
| Setting | Value | Description | | :— | :— | :— | | Mode | M | Manual Mode | | Focal length | 250 mm || | Aperture | f/7.0 | “Goldilocks Zone” is f/7.1 to f/8.0 at 250 mm | | Shutter Speed | 1/500 | Base speed for perched birds / slow movement. Can be dropped to 1/250s or 1/320s in low light. | | ISO | Auto | Camera handles exposure shifts in Irish weather | | ISO Base/Max | 200 / 6400 | Balance between signal and noise | | AF Mode | S-AF | Single AF (for precision through foliage) | | Subject Detection| Birds | AI-driven eye and body tracking | | File format | RAW ||
In West Cork’s challenging light, this mode prioritizes optical sharpness over low ISO. The 75-300mm lens is notoriously soft at its widest aperture (f/6.7) when fully extended to 300mm. Stopping down to f/8 forces the lens to resolve more detail, which is critical for bird feathers. While $1/500$ is sufficient for perched subjects, be prepared to scroll the front dial to $1/1600$ if the bird prepares for flight.