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. 2021 Feb 18;217(2):29. doi: 10.1007/s11214-021-00795-x

Fig. 27.

Fig. 27

An analysis of measured MTF vs temperature with autofocus. Left: Derived average Nyquist MTF values as a function of temperature from a series of auto-focused frames at 100 mm at a target distance of 3 m. With the appropriate correction in focus motor position, the highest achievable MTF remains constant as a function of temperature. Right: Plot demonstrating the required change in best-focus motor position as a function of temperature