Bronica RF645 (2000–2005)

At 810g, it rests in the hand like a precision instrument—dense, deliberate, and built for those who still believe in the rangefinder way.

Overview

The Bronica RF645 isn’t a relic from the 1950s dressed in modern clothes. It’s something rarer: a brand-new medium format rangefinder designed and released in the 21st century, when most manufacturers had already surrendered to automation or abandoned film altogether. Announced in September 2000 and discontinued by 2005, it was the first entirely new Bronica camera since the GS-1 in 1983, developed and sold under Tamron’s stewardship after it took over the Bronica brand. This wasn’t a nostalgic reissue—it was a forward-looking attempt to carve out a niche for photographers who wanted the intimacy of a rangefinder but the image quality of 6x4.5 film.

It targeted a narrow but passionate group: advanced amateurs stepping up from 35mm, existing medium format shooters, and working professionals who valued discretion and tactile control. The market at the time was dominated by fully automatic systems, yet a quiet resurgence of interest in manual rangefinders was underway. The RF645 positioned itself at that intersection—offering programmed auto, aperture-priority, and full manual exposure modes, all wrapped in a magnesium alloy chassis made via Thixomold, a process that delivered strength without excess weight. It was Bronica’s statement that mechanical elegance and electronic assistance weren’t mutually exclusive.

Despite its late arrival, the RF645 earned quiet reverence. Users describe it as “a super camera”—quiet, well-made, and intuitive. The irony, as one reviewer noted, is that few expected to fall for it, yet many did. It handled beautifully, focused smoothly, and delivered the kind of image separation that only medium format rangefinders achieve. But it also arrived at a turning point—digital was accelerating, film was retreating, and niche mechanical-electronic hybrids like this were becoming commercially unsustainable. By October 14, 2005, Tamron USA officially announced the discontinuation of the RF645. It was, as multiple sources confirm, the last Bronica ever made.

Specifications

Manufacturer	Bronica brand, developed and sold by Tamron Co., Ltd.
Country of design	Japan
Product type	Medium format 6x4.5 coupled rangefinder camera with interchangeable lenses
Format	Medium format 6x4.5
Film type	120 roll film, 220 roll film
Mount	Bronica RF645
Shutter type	In-lens leaf shutter
Exposure metering	Through the separate window
Exposure modes	Programmed Auto, Aperture-priority Auto, Manual
Rangefinder	Built-in, combined with viewfinder
Viewfinder	Built-in, combined with rangefinder
Finder magnification	0.6x
Actual rangefinder base	53.5mm
Effective rangefinder base	32.1mm
Bright-line frames	65mm, 135mm
Parallax compensation	Yes
Weight	810g
Dimensions	145.6x107.3x64mm
Lens focal lengths	45mm f/4, 65mm f/4, 135mm f/4.5
Flash sync	The flash will sync at all speeds

Key Features

Magnesium Alloy Thixomold Chassis

The upper casing is made from magnesium alloy formed using Thixomold, a process that delivers high dimensional accuracy and structural rigidity. This wasn’t just about weight savings—though the 810g result is admirably balanced—it was about precision. Owners report a solidity that feels engineered rather than assembled, a trait shared with high-end Japanese cameras of the 1980s but rare in the early 2000s.

Manual Film Advance with Ratcheted Option

The film advance mechanism is fully manual, a deliberate choice in an era when motor drives were standard. It allows either a full 180-degree stroke or a ratcheted advance, useful for quick partial winding or in tight spaces. While this gives the user complete control, it also introduces a known pain point: the “infamous winding issue.” Multiple user reports confirm that the mechanism can become stiff, occasionally refusing to advance altogether. This isn’t universal, but it’s frequent enough to be a red flag for potential buyers. When functioning properly, the advance is smooth and deliberate; when it’s not, it halts the entire shooting process.

0.6x Viewfinder with 65mm and 135mm Bright-Line Frames

The combined viewfinder and rangefinder offers 0.6x magnification, a practical compromise between field of view and subject detail. Bright-line framelines are provided for 65mm and 135mm lenses, automatically adjusting for parallax—no manual correction needed. The effective rangefinder base of 32.1mm (from an actual base of 53.5mm) limits long-lens accuracy, but The separate window for exposure metering means the viewfinder remains uncluttered, preserving the clean, classic rangefinder experience.

In-Lens Leaf Shutter with Full-Speed Flash Sync

Each RF645 lens contains a leaf shutter, allowing flash sync at all speeds—a major advantage for outdoor fill flash or studio work. This eliminates the need to stay within a narrow shutter speed range when using strobes. The trade-off is that shutter speeds are limited by the lens, not the body, and no specific speed range is documented in the fact sheet. Still, the ability to sync at any speed is a serious benefit for creative lighting, and it’s one of the system’s strongest technical arguments.

Historical Context

The RF645 emerged from a deliberate strategy by Tamron to redefine the Bronica line after taking over its development and sales. Rather than extend existing SLR platforms, Tamron pursued a new segment: a modern medium format rangefinder. It arrived during a turbulent period for film camera makers, as digital began its ascent. Yet, at the same time, a new generation of photographers was rediscovering the tactile and creative benefits of rangefinders. The RF645 was Bronica’s answer—neither a retro throwback nor a digital contender, but a focused tool for image-makers who valued precision and quiet operation.

It was also the last. By 2005, Tamron discontinued the model, marking the end of the Bronica brand as a producer of new camera systems. No successor followed. In that sense, the RF645 stands as a final statement: a technically accomplished, beautifully engineered camera that arrived just a few years too late to sustain a product line.

Collectibility & Value

Collectibility is complicated. The manufacturer’s repair window closed in 2012, and Tamron no longer performs repairs. Parts availability is reportedly nil, making long-term maintenance a gamble. The camera’s mixed construction—mechanical precision paired with electronics—means that when failures occur, they’re often difficult to fix. The winding mechanism, in particular, has earned a reputation for stiffness and unreliability, with users describing it as “the infamous winding issue.”

There’s no documented original MSRP or current market valuation in the fact sheet, but one user reported buying a body and 65mm lens kit for $700 in 2010. Today, functional examples are rare, and prices vary wildly based on condition and working order. A CLA (Clean, Lubricate, Adjust) can restore functionality, and some users report success sending units to third-party repair services like KEH. But the reality is that the RF645 is a “use it while you can” camera—admired, respected, and increasingly fragile.