The super-elmar-m 21mm f/3.4 asph Leica is a wide angle lens for FF and APSC formats produced since 2011 and still on the market. The focus is only manual and takes place through the ring activated by a lever practice for a more precise excursion also there is also no image stabilization. The minimum focus distance is 0.70 meters and the field amplitude is 91 degrees making it quite pushed but not to the point of becoming excessive. The speaker is supplied and made in solid metal. The weight and dimensions are quite small, this makes it easy to use even for long session. The images reproduced are very clear and there are no major defects: chromatic aberrations and distortions are almost absent and the colors are bright and realistic. The invoice is of excellent quality and gives this complaints and durability. The yield is excellent at any opening and all strokes. The super-elmar-m 21mm f/3.4 asph Leica is a lens suitable for professional and amateur photographers who are looking for a high performance lens that can give unique and extremely faithful shots. This support is of medium -high range and the possible investment fully justifies the expense. To increase a photographic kit with a not excessively high expenditure, this could be an excellent compromise