O.ZONE

One flagship.
Two cones.
The whole lineup.

The SL45 — paired with either the slim cone or the MP cone — is the current O.ZONE. The FW69, FW45 and Mk.7 / Mk.8 / Mk.G complete the family.

Flagship · Slim Cone

SL45 — Slim Cone

For Rodenstock Grandagon 55 / 75 mm. The slimmest, lightest configuration.

Back format
4×5 Graflok Optimised for
Rodenstock geometry
Flagship · MP Cone

SL45 — MP Cone

For Mamiya Press, Nikkor SW 65 mm and Rodenstock Grandagon 90 mm.

Back format
4×5 Graflok Optimised for
The Mamiya / Nikkor lineup
Instax specialist

FW69

FW45 geometry, optimised so Mamiya Press lenses fully cover Instax Wide.

Back format
4×5 Graflok Best with
LomoGraflok
Discontinued

FW45

The first 4×5 Graflok O.ZONE. No longer in production — fully supported.

Back format
4×5 Graflok Status
Discontinued
Origin · The first

Mk.7

The first O.ZONE. 6×9 only, built around Mamiya Press lenses and a Horseman back.

Back format
Horseman 6×9 Released
Fall 2023
Origin · Refined

Mk.8 / Mk.G

The refinement. PETG-CF chassis, detachable grip, full Graflok 23 backs. Mk.8 design files are public.

Back format
2×3 Graflok Files
Open on MakerWorld

The SL45 system

One body. Two cones.
The whole lens lineup.

The SL45 chassis ships with an interchangeable lens cone — the conical front section that holds the lens at the correct flange focal distance. Two cones are made for it. Together they cover every lens the O.ZONE supports.

The Slim Cone is the SL45's native configuration. Tuned to the short flange focal distance of the Rodenstock Grandagon family, it lets the chassis sit closer to the film plane than any other O.ZONE.

The MP Cone swaps in to extend the SL45's flange distance, making it compatible with the entire Mamiya Press lineup, the Nikkor SW 65 mm, and the Rodenstock Grandagon 90 mm. The same body, transformed.

XL-series lenses (e.g. Schneider Super-Angulon 90 mm XL) typically require their own dedicated, non-exchangeable cone. These are special-order configurations that need to be discussed with O.ZONE before ordering — the Rodenstock Grandagon 90 mm f/6.8 is the recommended safer choice.

SL45 — Slim Cone configuration

The flagship,
built for Rodenstock.

The SL45 with its slim cone is the newest and most refined O.ZONE. The chassis depth is tuned to the short flange focal distance of the Rodenstock Grandagon-N 75 mm and the Apo-Grandagon 55 mm — the lenses the body was designed around.

It is the smallest, lightest, best-handling configuration in the lineup. The grip is improved over the FW-series. The cone hot-swaps with the MP cone in seconds.

Back format
4×5 Graflok (612 / 67 / Instax / Sheet film)
Native lenses
Rodenstock Grandagon-N 75 mm · Apo-Grandagon 55 mm
Cone
Slim cone (interchangeable with MP cone)
Notable
Thinnest chassis · Best grip · Tuned to Rodenstock geometry
6×12 capable Instax (75 mm only) 4×5 sheet capable

SL45 — MP Cone configuration

The same chassis.
Mamiya glass.

Swap the SL45's lens cone for the MP variant and the same slim chassis becomes the platform for the entire Mamiya Press lineup — plus the Nikkor SW 65 mm and the Rodenstock Grandagon 90 mm. One body, two cones, twelve lenses.

For most photographers, the MP-cone SL45 is the workhorse setup. It inherits the FW45's lens compatibility on a thinner, better-handling body, and it costs nothing extra to swap to the slim cone when you reach for a Rodenstock 75.

Back format
4×5 Graflok · adapts to 2×3 with adapter
Native lenses
All Mamiya Press (50/65/75/100/127/250) · Nikkor SW 65 · Grandagon 90 · Super Angulon 90
Cone
MP cone (interchangeable with slim cone)
Notable
The most versatile O.ZONE configuration
6×12 capable Instax Wide capable 4×5 sheet capable 2×3 backs need adapter

FW69 — Optimised for Instax

Mamiya Press, on Instax,
with no vignette.

The FW69 is the Instax specialist. It shifts the lens centerline to make the Mamiya Press 50, 65 and 100 mm cover the LomoGraflok Instax Wide frame fully — no dark corners, no compromise. If your primary back is a LomoGraflok, this is the body to pair it with.

Back format
4×5 Graflok
Native lenses
All Mamiya Press lenses · the same large format glass as the FW45
Trade-off
Lens centerline shifts down — slight viewfinder parallax on roll-film backs
Best for
Photographers who use Instax Wide as their primary back
Instax-first VF parallax on 6×12

FW45 — The discontinued predecessor

Where 4×5 Graflok began.

The FW45 was the first O.ZONE built around 4×5 Graflok backs — the bridge between the original 2×3 Mk.8 / Mk.G and the slim SL45 generation. It established the lens cone system, the helicoid calibration approach, and the modular back swap that the rest of the lineup inherited.

It is no longer in production. If you have one, it remains fully supported — the same Mamiya Press, Nikkor and Rodenstock lenses still mount, and helicoids are still calibrated to its geometry. New owners should look to the SL45 with the MP cone, which inherits the FW45's lens compatibility on a thinner, better-handling chassis.

Status
Discontinued · Fully supported
Back format
4×5 Graflok · adapts to 2×3
Lenses
Mamiya Press · Nikkor SW 65 · Grandagon 90 · Super Angulon 90
Successor
SL45 with MP Cone
Discontinued Still supported

Mk.7 — Where it began

The first O.ZONE.

Released in autumn 2023, the Mk.7 was the original 3D-printed O.ZONE — a 6×9 chassis built around the Mamiya Press lens system and a Horseman 6×9 film back. The design language is borrowed from military aerial cameras: mechanical, efficient, no ornament.

It prints without support material and assembles with a handful of M3 screws and thread inserts — the simplest O.ZONE to build at home.

Back format
Horseman 6×9
Lenses
Mamiya Press
Material
PLA (support-free print)
Released
Fall 2023
The original Beginner-friendly print

Mk.8 / Mk.G — Refined originals

Compact, refined.

The Mk.8 (May 2024) succeeded the Mk.7 with tighter tolerances, a detachable offset grip, and carbon-fiber-reinforced PETG construction — heat-stable up to 85°C and stiff enough for daily field use. Internal light baffles seal the chassis against any leak, and compatibility expanded to the full Graflok 23 system, including Mamiya RB67 backs.

The Mk.G (October 2024) compressed the chassis further around RB67 / Graflok 23 backs only — aimed at the smallest possible handheld 6×9 setup.

The Mk.8 print files are released free on MakerWorld. If you have a printer and a Mamiya Press lens, you can build one yourself.

Back format
2×3 Graflok (RB67 backs · Graflex 2×3 · Horseman MF)
Lenses
Mamiya Press only
Material
PETG-CF / ABS · stable to 85°C
Files
Mk.8 print files released free on MakerWorld
Best for
The smallest possible 6×7 / 6×9 medium format setup
Most compact Detachable grip Open-source files (Mk.8)

Compatibility

Bodies × backs × lenses.

A quick reference for what mounts on what. The SL45's two cones are listed separately — both ship interchangeably for the same body.

Configuration 2×3 backs 4×5 backs (612 / sheet) LomoGraflok Instax Mamiya Press Large format glass
SL45 + Slim Cone Via adapter Yes Yes (75 mm only) No (swap to MP cone) Native (Grandagon 55 / 75)
SL45 + MP Cone Via adapter Yes Yes (Nikkor 65 excluded) Native Native (Nikkor 65 · Grandagon 90) · Super-Angulon 90 variants subject to fit
FW69 Via adapter Yes (offset frame) Yes — fully covered Native Native
FW45 Discontinued Via adapter Yes Yes (Nikkor 65 excluded) Native Native
Mk.7 / Mk.8 / Mk.G Native No No Native No

Recommended pairings

If you don't know where to start.

Four configurations that make the most of each body — chosen by photographers who shoot the system daily.

Han River at dusk — SL45 + Grandagon-N 75 mm on 6×12 Ektachrome E100 Best all-rounder

SL45 (Slim) + Grandagon-N 75 + 6×12 / Instax

A natural, distortion-free panoramic sweep that matches the human eye scale. The most-recommended starter combo.

Shanghai daytime skyline — SL45 + Nikkor SW 65 mm on 6×12 Provia 100F Best panorama

SL45 (MP) + Nikkor SW 65 + 6×12

Dramatic ~38mm-equivalent panoramas. Eight glass elements of leading lines.

Tangled fishing nets in green and blue — SL45 + Grandagon 90 mm on 4×5 sheet Provia 100F Best large format

SL45 (MP) + Grandagon 90 + 4×5 sheet

~25 mm equivalent on a 102×127 mm sheet of film — the largest negative the system shoots. For when resolution is the point and panorama isn't.

Instax frame — FW69 + Mamiya Press 50 mm Best Instax

FW69 + Mamiya 50 mm + Instax

The widest Mamiya — and the only one that comfortably covers Instax Wide. A handheld instant ultra-wide, the forgiving “street sweeper” of the system.

6×12 panorama on Mamiya Press 75 mm — sample shot taken on FW45 Best budget 6×12

SL45 (MP) + Mamiya 75 mm + 6×12

~26 mm equivalent on 6×12 — the same framing as a Grandagon-N 75, at a fraction of the cost. The Mamiya Press 75 is one of only two Mamiya lenses with an image circle big enough to cover the full panoramic frame.

Instax frame — FW69 + Mamiya Press 65 mm Best lightweight

FW69 + Mamiya 65 mm + Instax

The smallest carry-everywhere kit in the system. Compact body, compact lens, Instax-ready — slips into a small bag for handheld instant frames.

Configure your own