The Macro-Elmar-M 90mm f/4 is a distinctive and compact lens in the Leica M-mount collection, recognized for its retractable structure and compatibility with the Macro-Adapter-M, facilitating close-up photography. It employs a straightforward yet efficient optical configuration consisting of four elements arranged in four groups, ensuring consistent sharpness and uniform illumination across various aperture settings and focusing distances. Additionally, a multi-layer anti-reflective coating has been applied to each element to minimize lens flare and ghosting, thereby enhancing contrast and color accuracy. The manual focus mechanism allows for working with subjects positioned as close as 2.6 feet, achieving a reproduction ratio of 1:6.7.

When paired with the optional Macro-Adapter-M and utilized on a camera equipped with live view, this lens can reach a minimum focusing distance of 16.1 inches, providing a reproduction ratio of 1:2. Furthermore, its retractable design ensures that infinity focus is preserved when the Macro-Adapter-M is in use.

• Four elements within four groups optical design delivers edge-to-edge sharpness and illumination throughout the aperture range.
  
  
• Retractable lens design (1.6"-long when collapsed) helps to maintain a compact form factor during traveling.
  
  
• A multi-layered anti-reflective coating has been applied to individual lens elements to minimize lens flare and ghosting for color-neutral, contrast-rich imagery.
  
  
• Manual focus design provides a minimum focusing distance of 2.6' with a maximum magnification ratio of 1:6.7.
  
  
• When paired with the optional Macro-Adapter-M, and used on a camera featuring live view, a minimum focusing distance of 16.1" is possible with a maximum reproduction ratio of 1:2. Additionally, infinity focusing is still possible when used in combination with the Macro-Adapter-M.