Mamiya 645 150mm AF f/3.5

The Mamiya 645 150mm AF f/3.5 is a 150mm prime lens for the Phase One / Mamiya 645 mount, featuring autofocus, a maximum aperture of f/3.5, a minimum focus distance of 1.4m, a 58mm filter thread, and a weight of 544g — built for portrait and sports shooters working in medium format.

Key Specifications

• Focal Length: 150mm (prime)
• Maximum Aperture: f/3.5
• Minimum Aperture: f/32
• Lens Mount: Phase One / Mamiya 645
• Autofocus: Yes
• Minimum Focus Distance: 1.4m
• Filter Thread: 58mm
• Weight: 544g
• Image Stabilisation: No
• Lens Type: Short Telephoto Prime

What makes the Mamiya 645 150mm AF f/3.5 special?

In the world of medium format photography, a 150mm lens hits a very practical sweet spot. On the 645 format, 150mm gives you a field of view roughly equivalent to around 95mm in full-frame terms — tight enough for flattering subject compression in portraits, comfortable enough to keep a working distance that doesn't crowd your subject.

The autofocus version of this lens is a meaningful step up from the older manual-focus Sekor C 150mm f/3.5. That earlier lens is well-regarded for its optical quality, but it's tied to manual-focus bodies. The AF version opens the door to shooting on autofocus-capable systems like the Mamiya 645AF and modern Mamiya-mount digital backs, including Phase One bodies — which is where a lot of these lenses end up today.

Corner sharpness is genuinely strong with this lens. Community feedback across forums and review threads notes that while center sharpness can be slightly soft wide open (a common characteristic of short telephoto medium format glass), the corners hold up well — which matters enormously when you're working with large medium format sensors or film frames where edge detail is fully visible. Stop down to f/5.6 or f/8 and center performance tightens up considerably.

Compared to the Mamiya 645 80mm f/1.9, the 150mm sacrifices maximum aperture and the tight-portrait look of that faster lens, but gains working distance and compression — useful if you're shooting environmental portraits or need to stay further back from your subject. The Mamiya 645 80mm f/1.9 is the fastest lens in the 645 lineup and is more sought-after for studio-style portraiture, but the 150mm AF f/3.5 is a more versatile field lens.

Who is the Mamiya 645 150mm AF f/3.5 for?

If you're building a medium format kit around a Mamiya 645AF or a Phase One digital back, this lens deserves serious consideration as your dedicated portrait and people lens. The 150mm focal length gives you enough distance to shoot naturally, and the autofocus makes it genuinely usable for anything that moves — wedding coverage, editorial portraits, even slower-paced sports or events where you need AF reliability without hauling a 35mm system.

For film photographers shooting on Mamiya 645 bodies, this lens works beautifully on 120 roll film. The 544g weight is manageable, and the 58mm filter thread is common enough that you won't struggle to find circular polarisers or ND filters.

It's also a practical choice if you're stepping into medium format from 35mm and want a focal length that translates your existing instincts. Portrait shooters who work with 85mm or 105mm lenses on full-frame will feel at home with the field of view this lens delivers in the 645 format.

This lens is less ideal for wide-angle landscape work or anything that requires close macro distances — the 1.4m minimum focus distance is standard for a telephoto of this type, not a close-focus specialist. If your work leans toward wide environmental shots, you'd want to look at shorter focal lengths in the Mamiya 645 lineup alongside this one.

Buying a used Mamiya 645 150mm AF f/3.5

Picking up a second-hand Mamiya 645 150mm AF f/3.5 is a smart move for medium format photographers who don't want to pay new glass prices for a lens that was already built to last. These lenses were made for professional use, and many examples in circulation have been well cared-for in studio or portrait environments.

At Camera-tweedehands.nl, every lens undergoes a thorough professional inspection before sale. We verify that the autofocus mechanism engages smoothly and hunts minimally, and we document any wear on the 58mm filter thread — filter ring damage is common on well-travelled glass. We inspect internally for clean glass; dust is normal and rarely affects image quality on medium format optics, but we screen out any examples with fungus or separation. We confirm the aperture cycles cleanly through the full f/3.5 to f/32 range without hesitation, and we include our detailed inspection findings with every listing.

Every pre-owned Mamiya 645 150mm AF f/3.5 sold through Camera-tweedehands.nl is professionally inspected and comes with a minimum 12 months warranty. The actual warranty period is listed on the individual variant. Returns are accepted within 14 days, so you have real room to test the lens on your own system before it's fully committed.