Here is experience from many years of astronomical practice:
General contrast gain on the moon, off its terminator Enhances contrast in Jupiter's and Saturn's cloud bands Enhances surface details on Mars In large aperture telescopes you may see cloud details on Venus. Good comet filter - boosts contrast in the comet's tail
Well-suited for observing Venus in telescopes of 150mm aperture or larger. It makes the dark clouds in Venus' atmosphere visible. Boosts structures in Saturn's rings You may also use this filter on Mercury under good seeing conditions in large telescopes.