← All calculators
Browse all 23 calculators
About this calculation: inputs, formula and confidence

How many frames must I capture?

Turn a desired accepted integration into a capture count and rejection allowance.

Planning estimate

Formula

SNR ∝ √T

Comparable-frame SNR improves with the square root of accepted integration.

Where to find the inputs

  • Target integrationImaging goal
  • Sub-exposureSub-exposure calculator
  • Rejection ratePrevious session statistics
  • Existing integrationPrevious session statistics

Related

Optimal Sub-exposure →Exposure & SNR →Storage Volume →

Total integration planner

Turn a depth target into a capture plan.

Convert desired accepted integration into frame counts, a rejection allowance and remaining time.

Purpose and method

What this calculator does

How many frames must I capture? Turn a desired accepted integration into a capture count and rejection allowance.

In words: Comparable-frame SNR improves with the square root of accepted integration.

Change a value and the result updates immediately. The square-root comparison assumes comparable sky, transparency, framing and calibration quality across the combined data.

Working geometry

Integration accumulation

Accepted sub-exposures accumulate into total integration while a rejection allowance increases capture time.

accepted sub-exposurestotal T

Inputs

Integration target

Unit: h
Unit: s
Unit: %
Unit: h

Calculated now

Capture requirement

Accepted frames needed
160
Frames to capture
178
Rejection allowance
18
Planned capture time
8.90 h
Remaining accepted time
6.00 h
SNR relative to current stack
2.00 ×

Governing equation

Stack signal-to-noise scaling
SNR∝√T

In words: For comparable calibrated frames, signal-to-noise improves with the square root of total accepted integration time.

Show the working

The calculator applies the equation above to the values currently entered, without rounding until this display.

Accepted frames needed
160
Frames to capture
178
Rejection allowance
18
Planned capture time
8.90 h
Remaining accepted time
6.00 h
SNR relative to current stack
2.00 ×

The square-root comparison assumes comparable sky, transparency, framing and calibration quality across the combined data.