Pancake lens wide angle lens series voigtlnder skopar lens mount leica m lens speed 25 focal length 35 mm construction prime lens area of use night photography indoor photography action photography landscape photography news photography focus manual focus af motor no internal af motor closest focusing distance 70 cm lens construction groupselements 57 minimum aperture 22 max aperture 25 length 23 mm lens diameter 55 weight 134 g include