I purchased the Leica 28mm f2 APO SL lens a long time ago. And for the past few years, it has been my most used lens. The special image quality of an apochromatic lens is really something to behold. Plus, there’s the solid build quality it offers too. And recently, the brand offered a firmware update to the lens to make it even better. So we’ve updated our Leica 28mm f2 APO SL lens review.