Glass Bodies a variant-level encyclopedia of vintage lenses and cameras by iwillpat

Biogon T* 28mm f/2.8 (Contax G)

Carl Zeiss · Contax G · 1994 · Biogon — near-symmetrical wide-angle, 7e/5g

Also known as: Contax G Biogon 28mm f/2.8 · Biogon 28mm f/2.8 G · Biogon T* 2.8/28 · Contax G 28mm · Zeiss Biogon 28mm Contax G

Variants & identification

Variant Mount Years Serial ranges Production
Biogon T* 28mm f/2.8 (Contax G) Contax G 1994–2005 — Unpublished — Kyocera released no figures
How to tell them apart (expand)

Biogon T* 28mm f/2.8 (Contax G):

  • 46 mm filter; 31 mm long; titanium-finish or black; Made in Japan

Specifications

Formula
Biogon — near-symmetrical wide-angle, 7e/5g
Construction
7 elements / 5 groups
Aperture range
f/2.8–f/22
Min. focus
0.5 m
Weight
150 g
Filter
46 mm
Years manufactured
1994–2005
Country
Japan
Coating
Carl Zeiss T* multicoating
Original price
US$660 (1995, Popular Photography via Wikipedia) (today $1,360)

What reviewers say

History

One of the launch trio of 1994 with the 45 and the 90: seven elements in five groups, three in front of the stop and four behind, 150 grams, 46 mm filter, $660. James Tocchio calls it “as near to perfect as a wide-angle lens gets” on film — impeccably sharp, virtually no distortion, strong micro-contrast — and essential for anyone with a G body.

On a digital sensor it is a different lens. sebboh and Phillip Reeve measured severe field curvature, astigmatism and colour shift on Sony bodies, cured only by a reversed 1.5 m PCX filter, with two and a half stops of vignetting on top; “adapter based focusing is a serious compromise.” Buy it for the G.

Expand Collapse

This history is AI-written, from the sources listed at the foot of the page. Where the record is silent it says so rather than filling the gap — but no human wrote these sentences.

Example photos

Sample photo wanted — shot with a Biogon T* 28mm f/2.8 (Contax G)? We'd love to feature it (with credit).

Live listings

Asking price, USD: a median of $480 across 26 fixed-price listings on 2026-10-19 (middle half $430–$510). Tracked since 2026-09-10, 9 days: unchanged from $480.

By day
DateMedianMiddle halfListings
2026-10-19$480$430–$51026
2026-10-18$480$430–$51026
2026-10-17$480$430–$51026
2026-10-16$480$420–$51024
2026-10-15$480$420–$51024
2026-09-21$440$400–$53028
2026-09-18$450$400–$53028
2026-09-11$480$400–$52029
2026-09-10$480$400–$52029

Asking prices from the listings scanned, not sales; junk-flagged rows and auction lots excluded; other currencies are not converted.

Show 48 more listings

Buying from Yahoo! Auctions outside Japan. It is a domestic marketplace: sellers ship within Japan, and most will not register an overseas buyer. A proxy service bids on your behalf, receives the item and forwards it, for a fee and a wait. Buyee, Jauce and ZenMarket each accept a Yahoo auction number directly. Listed alphabetically for information — none is recommended over another, and none of these is an affiliate link.

Listings updated 2026-10-19. Links go to the shop or marketplace that carries the item.

Related: Biogon T* 21mm f/2.8 (Contax G) · Planar T* 35mm f/2 (Contax G)

Sources (5)

Every page here is assembled from public sources, and the gaps are real ones. If you own this lens, know a serial number I'm missing, or can see where I have it wrong, tell me — corrections, serials and sample photos are all worth having.