ImageReasonSensor and Lens Resolution
Does this sensor have enough sampling for my crop?
Convert your sensor and pixel dimensions into pixel pitch and sampling density, then see exactly how a crop and an output size change the retained pixels and PPI.
Answer
Visualize
Calculate to see the retained-crop grid.
| Quantity | Value |
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Compare
| Crop | Retained pixels | Limiting PPI |
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Stress-test
Plan
Calculate a result to generate a copyable plan.
What pixel pitch can and cannot tell you
Pixel pitch is the physical spacing implied by a sensor's active dimensions and its pixel dimensions. It is useful for describing sampling density, but it is not a score for image quality. A pixel does not guarantee a resolved line from the lens, a stable camera, accurate focus, a cooperative subject, or a well-processed file. The point of this planner is to separate what the geometry can tell you from what still needs a photographic decision.
Enter the active sensor width and height, not a marketing crop factor, plus the actual pixel dimensions of the capture. The result shows pixel pitch and pixels per millimetre. Add a crop to see the dimensions and megapixels that remain. Crop is two-dimensional: cutting width and height to half retains one quarter of the original area and one quarter of the pixels. That is usually the number that matters when a small subject needs to fill a large output.
Add an output size only when you have one in mind. The planner will show the resulting pixels per inch from the retained crop. PPI is an input to output planning, not a verdict. A print viewed close needs more image detail than a print viewed from across a room, and the subject may not contain detail that the sensor sampled. Use the Print Resolution and Viewing-Distance tools to make that next decision.
For example, a 36 by 24 mm sensor producing 6000 by 4000 pixels has a 6.00 um pitch and 24 MP. A centered 50% by 50% crop retains 3000 by 2000 pixels, or 6 MP. At a 24 by 16 inch output that crop provides 125 PPI. That can be a useful starting fact, but whether it is suitable depends on output distance, sharpening, the photograph's subject, and how much detail the lens and capture actually delivered.
Use a manual comparison when choosing between systems or capture modes. Keep the assumptions visible. Do not use pixel pitch alone to predict noise, dynamic range, or sharpness. Those outcomes depend on sensor design, exposure, optics, motion, processing, and the way the photograph will be seen.
FAQ
- Does smaller pixel pitch mean worse image quality?
- No. Pitch describes geometry. Image quality also depends on sensor design, lens performance, exposure, motion, focus, processing, and output conditions.
- Why does a 50% crop lose 75% of pixels?
- A crop changes both width and height. Half width times half height leaves one quarter of the original area.
- Can this tell me whether a print will look sharp?
- It provides output PPI from the entered geometry. Use viewing distance and a proof print for the final judgement.