The Voigtlander Super Wide-Heliar Aspherical II 15mm f/4.5 is a great improvement on one of their best lenses, really a lens that put Voigtlander on the map for the Leica M mount shooters.  With sturdy, traditional high-quality Japanese construction and classic style, the Super Wide-Heliar's likely the most practical choice as your widest lens for use with Leica M8 cameras and future digital rangefinder Leica M mount offerings.  Fitted with a 52mm UV/IR rejection filter and coded as "WATE" to the Leica M8, you'll find that light falloff and cyan shifting are extremely well-corrected.

Made in Japan by Cosina (a small optics company who also manufactures Zeiss-branded lenses), the Super Wide-Heliar uses the same optical formula as its beloved predecessor and adds accurate rangefinder coupling, 52mm filter threads, and a modern Leica M mount (instead of the Leica screw mount).

This lens offers a f/4.5 maximum aperture, but unlike many lenses it performs nearly as brilliantly at f/4.5 as it will at friendlier apertures of f/5.6-11.0.  An optional dedicated viewfinder's available.  This lens triggers the 28/90mm framelines on Leica M bodies.

Features

• Now rangefinder coupled and with Leica bayonet M mount
• Accepts 52mm filters, very important for Leica M8 users
• An ideal performing ultra wide angle lens
• Tack-sharp even at f/4.5
• Sturdy metal barrel
• Fixed-position petite lens hood
• Supremely compact; just 1.5" long and only 0.35 lb
• 10-Bladed aperture diaphragm
• Full multicoatings upon every optical surface
• Made in Japan 

Specifications

Filter Size
    52mm

f/Stop Range
    4.5-22.0

Minimum Focus Distance
    1.6' (50cm)

Magnification
    No Specified by Manufacturer

Angle of View
    100° x 77° (WxH) w/ film cameras
    84° x 62° (WxH) w/ Leica M8

Groups/Elements
    6/8

Length
    1.5" (38mm)

Maximum Diameter
    2.3" (59mm)

Weight
    0.34 lb (156g)