n MNASSA : Monthly Notes of the Astronomical Society of South Africa - DSLR photometry. How many darks?

Volume 74, Issue 3_4
  • ISSN : 0024-8266



The effect of the number of dark frames subtracted from a light frame on the signal to-noise ratio (SNR) of stars is investigated. The conclusion is that applying a single dark frame gives a substantial improvement in the SNR of stars, while applying additional dark frames gives only a very small improvement.

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