Apertia · Library
Focus-stack plan
A thin-lens plan using distances from the sensor plane. Real lens behaviour, focus breathing and computational photography are outside this model.
Inspect every frame’s covered interval
State the near and far targets, sensor, actual focal length and aperture. The native planner proposes successive focus distances and reports the coverage interval for each frame. The important result is whether those intervals cover the complete requested range.
The planner stops at 40 frames. Reaching that cap is not equivalent to completing the stack: the output retains an explicit coverage state and any uncovered target interval, including an unbounded far target where applicable.
Plan the capture and review the sequence
Real focus movement, lens breathing, motion and the stacking software can affect the combined image. Compare the proposed intervals with your actual capture and inspect the merged result. This worksheet does not align or merge photographs.
Method and reference context
A thin-lens plan using distances from the sensor plane. Real lens behaviour, focus breathing and computational photography are outside this model.
Results
Example calculation
Focus-stack plan: worked out from the values already filled in the form above.
Inputs
- Sensor: Full frame
- Focal length: 50
- Nearest sharp point: 1,500
- Far target: Finite distance
- Farthest sharp point: 6,000
- Aperture: 8
Result
- Requested range covered: Yes
- Frame limit reached; target still uncovered: No
- Uncovered target extends to infinity: No
- Focus distance: 1,725.86635 · Near: 1,500 · Far: 2,035.18737 · Far limit is infinity: No
- Focus distance: 2,490.28335 · Near: 2,035.18737 · Far: 3,216.28352 · Far limit is infinity: No
- Focus distance: 4,576.59351 · Near: 3,216.28352 · Far: 7,986.78488 · Far limit is infinity: No
Related tools
Plan a shot · Geometric blur diameter (mm) · Horizontal angle of view (°)