Carl Zeiss Hologon T* 8/16 Contax G

Carl Zeiss Hologon T* 8/16 Contax G, M-converted

The Carl Zeiss Hologon T* 8/16 for Contax G is a rare fixed-aperture ultra-wide-angle lens originally made for the autofocus Contax G rangefinder system. It was introduced with the Contax G system in the 1990s as one of the most specialized lenses in the Zeiss G lineup. Zeiss documentation lists the lens as the Hologon T* 8/16, with 16.5mm focal length, fixed f/8 aperture, 5 elements in 3 groups, 106 degree angular field, 0.3m close focusing distance and 120g weight [1].

The lens is not a native Leica M lens. It was originally made for Contax G bayonet mount, where focusing was controlled by the camera body. However, some examples have been mechanically converted to Leica M mount for use on Leica M and mirrorless cameras. This entry covers the M-converted version of the Contax G Hologon T* 8/16, not the original unconverted Contax G lens as a system lens.

The Contax G Hologon should be kept separate from the earlier Carl Zeiss Hologon 15mm f/8 for Leica M, order number 11003. The Leica M Hologon is a 15mm, 3 element, 3 group lens from the 1970s, while the Contax G Hologon is a later 16.5mm, 5 element, 3 group T* lens from the 1990s. Both share the Hologon concept and fixed-aperture ultra-wide character, but they are different lenses with different mounts, production periods and optical formulas [1] [5].

Optical qualities

Rendering

The Hologon T* 8/16 is known for its extremely wide rectilinear view and very low geometric distortion. Phillip Reeve describes the Contax G 16mm Hologon as a unique lens with almost distortion-free rendering, strong vignetting and a special look that remains difficult to replace with modern ultra-wide lenses [5].

Sharpness

The lens can produce strong central sharpness, but edge and corner performance depends heavily on the camera, adapter or conversion accuracy, sensor stack and whether the dedicated center filter is used. It was designed for film-era Contax G cameras, so performance on digital sensors should be evaluated carefully rather than assumed from film use [5] [6].

Vignetting and center filter

Heavy natural vignetting is a defining part of the Hologon design. The lens was supplied with a dedicated center filter to reduce edge fall-off. Zeiss documentation and Contax literature describe the filter as part of the lens system, and complete sets with the original finder and center filter are much more desirable to collectors [1] [2].

Contrast and color

The T* coating gives the lens a more modern Zeiss contrast profile than earlier uncoated or single-coated ultra-wide lenses. However, flare and contrast can still depend on light angle, filter condition and internal reflections. Strong claims about flare resistance should be avoided unless tested with the exact copy.

Digital use

The lens can be used on mirrorless cameras with Contax G adapters and on Leica M bodies only when mechanically converted. Because the lens is not rangefinder-coupled after conversion, focusing is normally by scale, live view or electronic viewfinder. On digital Leica M bodies, color shift, edge smearing and vignetting may vary depending on sensor generation and profile correction [5] [6].

History

Development and Launch

The Hologon T* 8/16 was developed for the Contax G system, which Kyocera and Carl Zeiss introduced in the 1990s. The lens continued the Hologon ultra-wide tradition but used a newer 5 element, 3 group construction and Zeiss T* coating. Contax G brochures list it alongside other G-series Carl Zeiss lenses such as the Biogon, Planar and Sonnar lenses [1] [2].

Production Evolution

The lens was produced during the Contax G era, generally from the mid-1990s until the end of Contax camera production in the 2000s. It was never a common lens. Its fixed aperture, special finder, dedicated filter and extreme field of view made it a specialist optic rather than a normal wide-angle lens. Public production numbers are not consistently documented, so a firm production total should not be stated without stronger factory evidence.

Special Editions/Variants

No commemorative factory special edition is widely documented. The main collector-relevant distinction is between complete original Contax G sets and later M-converted examples. A complete original set usually includes the lens, dedicated optical finder, center filter, caps, case and box. Converted examples should be documented as converted because the original Contax G mount and focusing mechanism have been changed.

Collector Notes

Collectors should verify whether the lens is still in original Contax G mount or has been converted to Leica M. Important checks include the quality of the conversion, infinity focus, scale accuracy, rear element condition, finder, center filter, caps, case and original box. Because the Hologon has a strongly protruding rear optical design, compatibility should be checked carefully before mounting on any camera body. M-converted examples should not be described as factory Leica M lenses [3] [5].

Special editions

No confirmed factory commemorative special edition is currently documented.

Known collector-relevant variants and related versions include:

• Carl Zeiss Hologon T* 8/16 Contax G, original Contax G bayonet version.
• Carl Zeiss Hologon T* 8/16 Contax G complete set with dedicated finder and center filter.
• Leica M-converted Contax G Hologon T* 8/16 examples, service-modified or third-party converted.
• Carl Zeiss Hologon 15mm f/8 for Leica M 11003, historically related but separate native Leica M lens.
• Zeiss Ikon Hologon Ultrawide camera lens, earlier fixed-camera Hologon design, separate historical item.

Sources

• [1] Carl Zeiss. Hologon T 8/16 Contax G Data Sheet*. https://www.zeiss.com/content/dam/consumer-products/downloads/historical-products/photography/contax-g/datasheet-zeiss-hologon-816-eng.pdf
• [2] Contax. Contax G System Brochure. https://www.cameramanuals.org/contax/contax_g_system.pdf
• [3] MIR. Carl Zeiss Hologon T 16mm f/8 for Contax G*. https://www.mir.com.my/rb/photography/companies/nikon/nikkoresources/Contax/ContaxG2/Hologon16mm.htm
• [4] JuzaPhoto. Zeiss Hologon 16mm f/8 G. https://www.juzaphoto.com/recensione.php?l=en&t=zeiss_hologon16_f8
• [5] Phillip Reeve. Review: Contax-G 16mm 8.0 Hologon. https://phillipreeve.net/blog/review-contax-g-16mm-8-0-hologon/
• [6] 35mmc. Contax G2 and Zeiss Hologon 16mm f/8. https://www.35mmc.com/29/03/2019/contax-g2-zeiss-hologon-16mm-f-8-review/
• [7] Andy Shields. Contax G Zeiss Hologon 16mm f/8. https://andyshields.com/contax-g-zeiss-hologon-16mm-f8/