The Leica 28-35-50 Tri-Elmar is a somewhat small lens; almost identical in size as the prior 28-35-50 Tri-Elmar. The methods that let Leica keep the lens small was to limit the maximum aperture size to f/4 and to make a special combined lens hood and filter holder due to the front element protruding beyond the front side of the actual lens housing so they installed a bright red ring, saying, don't put me face down on the table or you're going to have made a costly mistake. As the included lens cap overlays the front side of the included special lens shade, there's fundamentally no cause to ever take the shade off allowing the red ring to forever remain hidden.
Leica Tri-Elmar-M 16-18-21mm f/4 Asph Red Ring
T
he focal length selection ring has an accurate feeling; and it's much better than the one the original Tri-Elmar. This appears to be due to a simpler link device for the frame line selector and focus coupling is needed in this new fabrication.
Optically, this new lens employs a pair of aspherical elements, and the internal focusing employs floating lens elements. For the depth of field scales there are engravings for each focal length of the lens, and the focusing device and aperture ring and have the unrivaled Leica silkiness that photographers and finely made equipment lovers will savour.
Leica Tri-Elmar-M 16-18-21mm f/4 Asph Cutaway
This Tri-Elmar is a true zoom lens and and can be used to shoot at virtually any focal length, and not limited to the 16-18-21mm markings. This is simple enough to discover for yourself. Way cool, particularly when used in conjunction with the Wide Angle Finder M that additionally allows in between settings.
Revised "6-bit" coding has been applied to this lens, allowing the digital M camera to optically read this information thus identify the particular lens being employed. The camera may then (alternatively) utilize a "final stage" software correction for vignetting
(for RAW images no changes are made and only the lens being utilized is
recorded)
Jan 28, 2011
Features
• Includes "6-bit code" which allows the digital M8 camera to identify which
lens is being used
• 2 Aspherical lens elements
Item Includes
• Leica Super Wide Angle/Wide Angle Tri-Elmar-M 16-18-21mm f/4 Aspherical Manual
Focus Lens (6-Bit, Updated for Digital) with Universal Wide-angle Viewfinder
• Front Lens Cap
• Rear Lens Cap
• Screw-On Lens Hood
• Soft Leather Case
• 3-Year Limited Warranty
M Mount Adapters
The Leica M mount was introduced in 1954 at the same time as the Leica M3. It's been the mount of choice on every Leica M series thru the present day Leica M7 film camera and Leica M9 digital camera
and Lenses.
The M Mount was also the mount used for Minolta's CLE rangefinder, on the Konica Hexar RF, on the later versions of the Voigtlander Bessa family
and Lenses, the mount for the Rollei 35RF, also quite recently on the newest Zeiss Ikon
Rangefinder and Lenses..
Benefits of Lens adapters is versatility, and saving money with the continued use of the preferred lenses you already own.
Drawbacks of lens adapters is the inconvenience, no electronic connection between the adapted lens and your camera body
A couple of factors are necessary for a lens adapter to work properly. First, the camera body "lens registration" space or the expanse between the mount of the lens to the sensor or film surface. Two, the "throat size" of the mount or the mount diameter. An adapter flanked by the body of the camera and a lens from different brands, this registration distance of the adapted lens must be larger than the registration distance on the body; plus the lenses throat-size must be less than the throat size on the body mount.
M lenses can be adapted to Canon EOS, Nikon, Micro Four
Thirds, and Sony Nex Cameras.
