It'll change throughout the night, but ultimately it just won't be 'as good' as it could be. Your stars won't be 'as tight'. If you can spring for an automatic focuser it is well worth the investment.
Chris
It'll change throughout the night, but ultimately it just won't be 'as good' as it could be. Your stars won't be 'as tight'. If you can spring for an automatic focuser it is well worth the investment.
Chris