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Community photo entitled  by Dr Ski on 02/16/2020 at Valencia Observatory Garden

On 02/16/2020 07:30 am by Dr Ski | Valencia Observatory Garden

The Last Quarter Moon is 90° from the Sun.
This is where maximum light polarization can be achieved with a polarizing filter.

Canon EOS M100
800mm, f8
1/50s@ISO160
CPL filter