Kenko Soften Image Filter



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The Kenko "soften" filter simulates high clouds or light fog, softening the appearance of stars and other bright objects in astronomical photos. By spreading the light of point sources out (see star profile graphs at right), star saturation on a digital imager is reduced, allowing the true colors of the stars to be recorded.
Many astrophotographers find this aesthetically pleasing as well as useful particularly for wide-field photos where the bright stars of a constellation stand out compared to dimmer stars. Soften filters are available in the 77mm size and have a stronger effect at longer focal lengths.


Place your cursor in these examples to see the effect of the soften filter (javascript must be enabled in your browser). Exposures for each pair of photos was kept identical to allow comparison.