Leica Elmar 9cm f/4 (4-Element Rigid)

Leica Elmar 9cm f/4 (4-Element Rigid)

The four-element rigid Elmar 9cm f/4 is the long-running slim telephoto that followed the short-lived large-barrel “Fat Elmar.” This profile covers the rigid Leica screw-mount lens introduced in 1933 and its Leica M-bayonet counterpart introduced in 1954. It excludes the Fat Elmar, the collapsible 9cm Elmar and the later three-element Elmar 90mm f/4.

The lens uses the classic four-element, three-group Elmar construction. Its modest f/4 aperture kept the optical unit compact, while the 90mm focal length provided portrait and distant-detail coverage without the bulk of faster Leica telephotos. Most examples are rangefinder coupled. Later rigid versions focus to 1m, while some earlier barrels and scales differ, so the engraved close-focus limit should be checked on an individual lens.

Production evolved substantially without changing the basic optical identity. Early screw-mount examples may have black-painted barrels with nickel or chrome fittings, older non-standard aperture scales and A36 clamp-on accessories. Post-war lenses gained coating, and later chrome screw-mount and M-mount examples commonly accept E39 filters. Several versions rotate the front section during focusing, which affects the use of polarizing filters and explains duplicated aperture markings on some barrels.

The bayonet version was sold under the codewords ELANG-M and ELGAM, with catalogue numbers including 11130 and 11830. ELANG also appears on screw-mount lenses, and Leitz reused or overlapped codes and catalogue numbers across production transitions. A codeword alone is therefore not sufficient identification. Optical construction, barrel form, mount and serial-number period should be considered together.

Optical qualities

Rendering

At f/4, a sound coated example gives good central definition with gentler contrast and less uniform corners than later 90mm designs. Fine detail and field consistency improve on stopping down, while the fifteen-blade diaphragm preserves a rounded aperture and smooth tonal transitions. Earlier uncoated lenses are more susceptible to flare and veiling contrast. Haze, cleaning marks and coating condition can influence results more strongly than small production differences.

The rigid barrel balances well on both Barnack and M bodies, although screw-mount cameras require a separate 90mm finder unless an appropriate accessory finder is fitted. On an M camera, the bayonet version or a correctly indexed LTM adapter brings up the 90mm framelines. Collectors should verify that the lens is neither the wide Fat version nor the collapsible or three-element successor before assigning it to this profile.