The 150mm f/4.0 is a unique, special application lens offering variable soft focus and can be used as a normal application telephoto at smaller apertures. It is the prime lens for many portrait and wedding photographers because of its unusual and controllable soft focus effects using designed-in spherical abberation at apertures from f/4 to f/8 and a set of three diffusion discs. The combination creates soft focus images that appear sharp at the same time, eliminating the need for costly and time consuming retouching. At f/8 and smaller apertures, it renders completely sharp, normal images. Its 150mm focal length makes it ideal for small studio working distances.
Applications include portraiture, fashion, beauty, landscape and general photography.
|Construction||3 Groups/ 5 Elements|
|Angle of view||33°|
|F stop range||f/4 - 32|
|Closest Focusing Distance||2' 9.7" / 856mm|
|Dimensions (Length x Diameter)||3.3 x 3.7" / 84 x 94mm|
|Weight||1 lb. 12 oz. / 790 g.|
|Notes||Shutter Seiko #1 mechanical lens shutter, 1 1/400 sec., T (time), X contact (flash synchronization at all speeds)|