The phenomenon of the increasing light smog not only affects the quality of night-time city and architecture photography, even scientific astro photography is almost impossible in urban ballroom as much as no more. The large mirror telescopes therefore stand on mountain peaks, islands or in human-empty areas without noticeable light pollution. Normal professional and amateur photographers can now use the Rollei Astroklar round filter to reduce the unwanted effect of light pollution and give their photographs more contrast and clarity. The Rollei Astroklar round filter reduces the unwanted yellow and orange components of the light largely thanks to a special coating and ensures that even different structures and transitions are reasonably displayed and do not "tear". The night and starry sky, partially or only sparsely illuminated building panoramas gain significantly in contrast and drawing, even extremely far away and barely visible stars can appear clear and clear on the astro photo. Choose between four common lens diameters for astro and city photography - the Rollei Astro Clear Round Filter is available in 39, 40, 5, 49, 52, 55, 58, 62, 67, 72, 77, 82, 86, 95 and 105mm. Due to the special anti-light smog coating, your recordings are somewhat cooler, the blue and green percentage is understandably exceeded. In order to counteract if necessary, you should perform a manual white balance when working with the astroclear filter. Our recommendation: choose a colour temperature between +700K and +1500K of the white balance without filter to obtain authentic colours in the end result.