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FWHM numbers not changing


ynot

Question

Hello all.

Can you assist a newbie and tell me why bye is not changing the values in FWHM mode.

Canon 50D ef 70 - 300 is usm lens.

I can focus using the step arrows but the values don't change.

HFD and StdDev numbers change.

Is it in the setup of camera.

Edit:- Sorry to sound like a complete idiot but i was trying to focus in a bright room.

Turned all lights off and double clicked on bright spot on a lamp and it worked all numbers changed as it should.

Happy now,,,, told you i was newbie at astrophotography.

Moving on in my lessons.

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