GD-1 Data Back: This data back with built-in quartz controlled LCD couples with the camera body to imprint date/time information on the film. The data back is simply exchanged with the standard camera back for installation.

GD-2 Data Back: A multi-function unit capable of recording data between frames. Data such as date, time, photo exposure data including exposure compensation, shutter speed, approximate aperture, and exposure mode. Or, data may be collected onto the first or first and second frames. The GD-2 also incorporates interval timing functions for nature and/or scientific photography.

TLA 140 Flash Ultra-compact, TTL direct metering flash for the Contax G-series system with a guide number of 14 in meters at ISO 100. The titanium colour finish provides integration with the G system while providing rugged construction and an elegant look. The TLA-140 is also appropriate for use with any Contax camera body.

TLA 200 Flash Ultra-compact, TTL direct metering flash for the Contax G-series with a guide number of 20 in meters. The titanium colour finish provides integration with the G system while providing rugged construction and an elegant look. In addition, the TLA 200 has a guide number of 20 in meters (66 in feet). The TLA 200 also offers a zoom head which covers the field of view from 28,35,45 or 90mm.

There are five filters available in two sizes. The Biogon 28, Planar 35, Planar 45 and the Sonnar 90 require the 46mm size, while the Biogon 21 requires the larger 55mm size. The five filters available in both sizes are: Contax Protective filter (P), Contax Multi-Coated Ultra-violet (L39) (UV), Contax Multi-Coated Skylight (1A), Contax Multi-Coated A2 (Warming) Filter (81B), Contax Multi-Coated B2 (Cooling) Filter (82A).

Three hoods, each custom made for a specific lens, are available. The Hologon 16 and Biogon 21 may not use any hood. The Biogon 28 and the Planar 35 each require the GG-1 Hood. The planar 45mm lens requires the GG-2 Hood while the Sonnar 90mm uses the GG-3 Hood. A Hood Cap fits each lens hood.

GA-1 Mount Adapter - Allows usage of the Carl Zeiss T* lenses on the Contax G1 or G2. Focus distance is referenced from the G1's focus system and manually translated to the SLR lens.

The Triotar T* Lupe 5X has a sufficient viewing field to cover the entire 35mm film format. The Loupe is not only designed to provide a very bright and clear image but to do so with superb color reproduction and almost no distortion. The long eye-point gives a comfortable view without tiring the eye during viewing sessions. The bottom section of the Triotar T* Lupe 5X is interchangeable allowing the user to select a transparent base for reflection print viewing or a solid base for transparency viewing.