|Stars over "The Fortress" - Bryce Canyon NP ~ © Royce Bair (click to enlarge images)|
|Stars over "The Fortress" - Bryce Canyon NP - with a Tiffen Double Fog 3 filter|
The three brightest stars and planet appearing here are (L-R): Arcturus, Mars and Spica.
Canon 5D Mk3 • Rokinon 24mm f/1.4 • f/2.0 • 13 sec • ISO 3200 ~ © Royce Bair
The are two disadvantages I find with the Tiffen Double Fog 3 filter: 1. Some ultra-wide angle lenses, Rokinon 14mm and the Nikkor 14-24mm do not accept filters; and 2. there is a slight loss in sharpness when using the filter. This loss of sharpness is most noticeable in foreground objects. In the top two photos there is a line of snow cover on the formation. This snow line has lost some definition and contrast in the image using the filter. In the two cropped enlargements below, you can see some edge blurring in the filtered image. In an image that I took that had light painting of the formation, this blurring and loss of contrast was more pronounced. This problem is eliminated by taking two shots (with and without filtration), and combining the filtered sky with the unfiltered landscape in post, albeit with some extra work.
|Cropped and enlarged view of fog filtered image ~ © Royce Bair|
|Cropped and enlarged view of non-filtered image ~ © Royce Bair|