OM-1 Mark II: Focus Stacking and RAW Workflow Guide
This guide details the technical workflow and file management strategy for using In-Camera Focus Stacking with the OM System OM-1 Mark II, specifically optimized for the Backscatter Smart Control (SC) ecosystem.
In the OM System, the combined composite image generated by the in-camera focus stacking process is always a JPEG. The camera’s internal processor does not currently output a combined RAW file.
2. The “RAW + JPEG” Strategy
To maintain professional flexibility, you must set the camera to RAW+JPEG in the settings menu. When you trigger a focus stack (e.g., 8 shots), the camera will save the following to your SD card:
| File Output |
Quantity |
Purpose |
| Composite JPEG |
1 File |
Instant verification of stack success on the EVF/LCD. |
| Individual RAWs |
8 to 15 Files |
The source frames containing full dynamic range for high-end editing. |
3. Professional Post-Processing Workflow
While the in-camera JPEG is excellent for quick review or social sharing, the professional macro workflow is:
- Capture: Trigger the stack using the OM-1 II and Backscatter HF-1.
- Review: Confirm the focus range covered the subject (e.g., from rhinophore to gills) using the composite JPEG.
- Import: Bring the individual RAW (.ORF) source files into your computer.
- Merge: Use specialized software like Helicon Focus or Zerene Stacker to combine the RAW files into a 16-bit TIFF or DNG. This provides the depth of field of f/22 with the optical clarity and dynamic range of a RAW file.
4. Hardware Requirements for Success
Successful stacking with strobes requires absolute lighting consistency across every frame.
- Smart Control (SC) Protocol: Using the BS-TR-OM1 trigger allows the camera to communicate digitally with the strobes, ensuring identical exposure for all 8+ frames.
- Recycle Speed: The HF-1 paired with Nitecore 21700 (20A) high-drain batteries is essential. It allows the strobe to fire 8 times in ~1 second without losing intensity.
- Strobe Power: Keep power at 1/4 or lower. This ensures the capacitors can recharge instantly for the next frame in the sequence.
5. Summary Checklist