Informal review: Zeiss ZM Biogon 21mm ƒ/4.5 Wide-angle Lens in Olympia (Oly 16)

21mm ƒ/4.5 Biogon lens with hood. The Leica M2 body is from 1967.

My New Biogon Lens

Dear Readers, once again, I failed to curb my GAS (Gear Acquisition Syndrome). I bought a Zeiss ZM* 21mm ƒ/4.5 C Biogon lens for Leica M mount. 

Decades ago, I had a 20mm ƒ/5.6 Russar lens, a pioneering optical design from the Soviet Union. It worked well, but I sold it in the early-2000s when I was reducing my photography stuff. 

But I missed a really wide view for 35mm and had eyed this Biogon for a while. LensRentals sent an email about a 20% off sale, and they offered one of these lenses. That was too good to resist. The lens looked absolutely new, and, I assume, they seldom, if ever, rented this particular unit. After ordering a 21mm Leitz viewfinder from Tamarkin Camera, I was ready to go. (I recommend both LensRentals and Tamarin Camera for good condition equipment and honest service.)

Zeiss made two 21mm lenses for the Leica M mount, this ƒ/4.5 C (Compact) model and an ƒ/2.8 version. The C lens is a compact gem and is intended for use on film cameras. It is almost distortion-free, meaning that straight lines remain straight. It takes 46mm filters, which are larger than the 39mm filters for my other Leitz lenses. The rectangle hood clips on the outside of the lens, and if you use filters, they must be the correct 46mm diameter to fit inside the hood.   

Finally, you need a 21mm external viewfinder to see what the lens covers. The built-in finder on my M2 camera has frame lines for 35mm, 50mm, 90mm, and 135mm lenses, but it is much too inaccurate to try to guess the coverage of a 21mm lens by looking at the edges of the viewfinder. The best external finders come from Leitz (Leica), Zeiss, and Voigtlander. The Leica unit was the only one with an offset shoe such that the mounted finder does not overhang the shutter speed dial (see the photo above). 

T400CN Examples, Olympia, Washington

One October morning with misty light, I walked around downtown Olympia. Here are some examples of how this 21mm lens can take in the big picture. Please click any photo to see it enlarged.

View south on Capital Way (21mm ƒ/4.5 Biogon lens, 1/15 sec.)

Capital Way sidewalk

Art alley parallel to 4th Avenue

Olympia Federal Savings parking lot (1/30 ƒ/5.6). Note the straight lines.

Mid-century architecture, Olympia Federal Savings bank

Olympia has a good selection of mid-century architecture. The city must have enjoyed a period of prosperity after the war, resulting in a burst of commercial construction. Some of this architecture has aged well, but some of it looks dismal.

Legion Way view west (1/30 ƒ/5.6)

Sylvester Park from Dancing Goats Coffee

Capital Way sidewalk

5th Avenue

Olympia's downtown core is grungy and dirty. I wish the city would do a serious cleaning, pressure wash the sidewalks, remove graffiti, remove the homeless, and install more effective street drains. It is disgraceful considering it is the state capital. 

Morning on East Bay

Many mornings, especially after a storm, the light on East Bay is just magic. This is my view during my morning coffee.

Fuji Acros 100 Film

Washington State Capitol (May 3, 2024)

State of Washington General Administration office building from Columbia Street SW

This 1956 office building is an example of International Style architecture, emphasizing horizontal lines and severe lack of external ornamentation. 

"The building was designed by prominent Tacoma architect, A. Gordon Lumm, in the International style distinctive for its horizontal cubical form and spare ornamentation. Its exterior minimalist appearance and interior architectural flexibility, including movable aluminum wall panels, demonstrate a growing aesthetic for modular space able to easily accommodate changing space and technology requirements."

This sounds like an early form of the cube farm. The building has been unoccupied since 2018 because the wiring, plumbing, and structure no longer meet building codes. Six years later, I do not see any work on demolition. Some planning documents state it will be replaced by a parking lot and restroom???

1970 (approx.) postcard of General Services Building.

This is a postcard from the University of Idaho's Northwest Historical Postcards Collection. The building did not look too bad back then. 

Summary

I am thrilled with my 21mm Biogon lens. It is high contrast and distortion-free. Resolution is remarkable on fine-grain film. It is compact enough to easily fit in a camera bag with the rest of the Leica kit. You need to be careful in framing to avoid converging lines, such as in the photograph of the General Services building. It is fine wide open at ƒ/4.5. You need the correct 46mm screw-in filters, but the mounts can be regular thickness (slim-mount not necessary). And you need the correct Zeiss rectangle hood. 

Summary: Highly-recommended!

* The Zeiss ZM lenses are made for use on Leica-M mount camera bodies. Most lenses are made in Japan, but a few are from Germany. Many reviewers state that the ZM lenses are as good optically as genuine Leica lenses, but are much less expensive. The 21mm ƒ/4.5 Biogon that I bought is out of production, so if you want one, grab one now. 

The 50mm ƒ/1.5 Sonnar is a modern version of the classic large aperture Sonnar lens, first made a century ago. I already have one Sonnar lens, a 1962-vintage Soviet 50mm ƒ/2 Jupiter-8. These Sonnars produce a different "look" than most contemporary 50mm lenses. 

The Zeiss ZM 25mm Biogon lens has a superlative reputation. But I won't buy one, I promise...... 

(Coming soon: 21 mm scenes in Athens and Istanbul.)