When it was launched in 1998 the TRI-ELMAR-M 1:4/28-35-50 mm ASPH. was another milestone in the history of M photography. For the first time Leica engineers had succeeded in uniting the most common focal lengths of the LEICA M system in a lens while retaining the high optical performance typical of Leica.
The mechanism of the TRI-ELMAR- M has been completely redesigned and is now even more reliable and simpler to use: for example, a shaped handle on the distance setting ring makes focusing easier and a scale on the lens displays the depth of field for all three focal lengths. The filter diameter has been reduced to E 49 for a better viewfinder image. The optimized zoom ring engages audibly and tangibly at every focal length now, thus preventing accidental readjustment of the focal length. A metal lens hood is available as an accessory that does not obstruct the viewfinder image. For the first time it is possible to use a polarizer on the TRI-ELMAR-M. By using an adapter an E 67 circular polarizer can be used that is set directly through the viewfinder. A matching UVA "slim filter" that prevents vignetting at 28 mm is available for the E 49 filter thread. The front lens cap (A53) that is also new reliably protects the lens. This means that the 340 g compact TRI-ELMAR-M in the high-quality Nappa leather case is ideally suited to travel, leisure and photojournalism.
The optical system of the TRI-ELMAR-M 1:4/28-35-50mm ASPH has been retained. The lens designed and manufactured in Germany comprises 8 lenses in 6 groups. In order to nevertheless be able to guarantee maximum optical performance for such a compact lens, two aspherical lenses were used. Furthermore, 5 lenses in the complex optical system are made of especially high refracting glass. The TRI-ELMAR-M 1:4/28-35-50 ASPH. is characterized by good to very good performance at all three focal lengths. Even when completely open, a high-contrast image with good detail resolution is achieved. The contrast can even be increased by stopping down at aperture 5.6. Because the performance is already good with maximum opening, the critical f-stop with this lens is between f-stop 5.6 and 8. At all three focal lengths, field curvature has been reduced to a minimum so that it is not visible in practice. At 35 mm and 50 mm vignetting is similarly low to that of the LEICA M fixed focal lengths, only at 28 mm artificial vignetting is slightly stronger only at 28 mm. Above f-stop 8 all three focal lengths of the TRI-ELMAR 1:4/28-35-50 mm ASPH. are free of artificial vignetting.
|Construction||6 Groups/8 Elements|
|Angle of view||76°
|F stop range||4-22|
|Closest Focusing Distance||3.3' (1.0 m)|
|Maximum Magnification||1:31 @ 28mm
1:26 @ 35mm
1:18 @ 50mm
|Filter Size||E 49|
|Dimensions (Length x Diameter)||2.7 x 2.2" 67.8 x 55mm|
|Weight||0.75 lb 340g|