Contax 21mm f/2.8 Zeiss Biogon T* Lens for G-Series, Titanium {55} with Finder (for G2, Modified G1 Body)

Zeiss Biogon T* 21mm f/2.8 for Contax G, titanium finish with dedicated finder

The Biogon T* optical design earns its reputation in wide-angle work: symmetrical construction keeps distortion low and maintains edge-to-edge rendering that flattered the G system's film plane. At 21mm with a f/2.8 maximum aperture, this lens sits at the wider end of the G mount's native lineup, giving street and documentary shooters meaningful coverage without switching systems. The 55mm filter thread means standard circular polarizers and UV filters fit without adapters.

The included dedicated 21mm viewfinder is not an accessory afterthought, it's a practical necessity. The G system's built-in finder does not frame 21mm, so the dedicated finder attaches to the body and is what you'll actually compose through. Without it, shooting at this focal length on a G body becomes guesswork. This lens is compatible with the Contax G2 and with modified G1 bodies. The titanium finish gives it a build character consistent with the G system's construction standards, and it pairs visually with the G2's own profile. For anyone already invested in the G system, the 21mm Biogon is the wide-angle option the system was built around.

Who It's For

Street photographers shooting in tight urban spaces get the 21mm field of view with a f/2.8 aperture that handles low light without forcing a tripod. Documentary and travel shooters who want a wide lens compact enough to carry all day will appreciate that the G system's autofocus-capable body keeps the workflow moving. Film photographers building a G-mount kit who need a genuine ultra-wide option will find the Biogon T* optical design delivers the rendering that made Zeiss glass sought after on medium-format and 35mm systems alike. The included dedicated finder makes this a complete, ready-to-shoot package.

Key Features

• Zeiss Biogon T* optical design with symmetrical construction
• 21mm focal length with f/2.8 maximum aperture
• Includes dedicated 21mm viewfinder for accurate composition
• Contax G mount compatible with G2 and modified G1 bodies
• Titanium finish with premium build quality
• 55mm filter thread for standard accessories

FAQ

Why do I need the dedicated 21mm finder if the Contax G2 has a built-in rangefinder?

The G2's built-in finder does not frame 21mm focal length. The dedicated 21mm finder that comes with this lens is essential for accurate composition and focus confirmation at this wide angle.

Is this lens compatible with both G1 and G2 bodies?

It's compatible with the Contax G2 directly. For G1 bodies, compatibility requires modification to the body, so you'll want to verify your specific G1 is set up for this lens before purchasing.

What filter size does the 21mm Biogon use?

55mm filter thread. Standard circular polarizers and UV filters fit without adapters.

What's the optical advantage of the Biogon design at 21mm?

The symmetrical Biogon construction keeps distortion low and maintains edge-to-edge rendering across the frame, which matters on film where edge softness is unforgivable.

Does the titanium finish affect handling or durability?

The titanium finish gives the lens a premium feel and durable construction quality consistent with the G system's build standards. It's a material choice that reflects the system's overall design philosophy.

Is the 21mm Biogon the only wide-angle option for the Contax G system?

This is the wide-angle lens the G system was built around. It's the standard wide-angle focal length for the mount.