Leica 90mm LM Ring Leica Mount Adapter L-Mount to M-Mount. This is a mount adapter that converts L-mount lenses to M-mount. The 90mm/28mm finder frame is paired, but since the 28mm frame camera body came out later, the engraving is "90mm" only. To prevent swapping, cancellations and returns are generally not accepted. Please check the condition of the item in the photos carefully before purchasing and make sure you are satisfied. Thank you for viewing.