Medium Format Film Camera Buying Guide: 645, 6x6, 6x7 and TLR Explained

If you are moving beyond 35mm film, medium format is one of the most rewarding steps you can take. A medium format film camera uses a larger negative than 35mm, which can give you noticeably more detail, smoother tones, finer grain, and a more spacious look to your images. For portraits, landscapes, studio work, travel photography and deliberate everyday shooting, a good 120 film camera can feel wonderfully tactile and produce results that are difficult to imitate.

Medium format is not one single camera type, though. A 645 SLR, a square-format 6x6 TLR, a folding 6x9 camera and a professional 6x7 system all use medium format film, but they handle very differently. Some are compact and economical, while others are heavier, slower and built for maximum image quality. This guide explains the main medium format sizes, camera designs, finders, lenses and practical buying considerations so you can choose the right camera before browsing our 120 film medium format cameras.

What is a medium format camera?

A medium format camera is a camera that uses film larger than 35mm but smaller than large format sheet film. In practical vintage camera terms, most medium format cameras use 120 roll film. Some also accept 220 film, although 220 is far less common today.

The important difference is negative size. A standard 35mm frame measures 24x36mm. Medium format negatives are much larger, with common frame sizes including 6x4.5cm, 6x6cm, 6x7cm and 6x9cm. The names are approximate, but they give a useful idea of how much bigger the image area is.

That larger negative brings several advantages:

• More detail for scanning and printing

• Smoother grain, especially with slower films

• Richer tonal transitions in black and white photography

• A distinctive sense of depth and subject separation

• Greater flexibility for cropping, enlarging and high-resolution scans

The trade-off is that medium format cameras are usually larger than 35mm cameras, offer fewer shots per roll, and often require a slower, more considered shooting style. For many photographers, that is exactly the appeal.

What is a 120 film camera?

A 120 film camera is any camera designed to use 120 roll film. 120 film is not the same as 35mm film: it has no sprocket holes, it is backed by protective paper, and the final image size depends on the camera rather than the film itself.

The same roll of 120 film can produce different numbers of photographs depending on the camera format. A 645 camera gives more frames per roll, while a 6x7 or 6x9 camera gives fewer, larger negatives.

When buying a medium format camera, the frame size is one of the biggest decisions. It affects not only image quality, but also camera size, cost per frame, handling, lens options and how quickly you work.

645 vs 6x6 vs 6x7: which medium format size should you choose?

645 medium format cameras

645, also written as 6x4.5, is often the easiest medium format format to live with. It gives you a negative much larger than 35mm while still offering a relatively generous number of exposures per roll. With 15 or 16 shots from 120 film, it is more economical than 6x6 or 6x7 and less intimidating if you are new to medium format.

Many 645 cameras are also more compact than larger professional systems. They can feel closer to a traditional SLR in use, particularly models with prism finders, built-in metering or motorised film advance. This makes 645 a strong choice if you want medium format quality without completely changing the way you shoot.

Choose 645 if you want:

• More frames per roll than other medium format sizes

• A camera that is easier to carry for travel or handheld use

• A familiar rectangular frame for portraits and landscapes

• A good balance of image quality, cost and convenience

645 is ideal for photographers who shoot regularly and do not want every frame to feel too precious. It is also a good choice for events, fashion, environmental portraits and location work where portability matters.

6x6 medium format cameras

6x6 is the classic square medium format. It is strongly associated with twin-lens reflex cameras, Hasselblad-style SLR systems and many folding cameras. The square frame changes how you compose: there is no vertical or horizontal orientation, and you can crop later if you need a rectangle.

Many photographers love 6x6 because it encourages calm, balanced compositions. It works beautifully for portraits, still life, documentary work and minimal landscapes. If you enjoy composing carefully and thinking in shapes rather than conventional horizontal and vertical frames, 6x6 can be very satisfying.

Choose 6x6 if you want:

• A classic square negative with 12 shots per roll

• A slower, more deliberate way of composing

• Excellent compatibility with waist-level viewing

• A wide choice of TLRs, SLRs and folding cameras

The main thing to consider is whether you enjoy the square. If you often crop to a rectangle, you may lose some of the negative area advantage compared with 645. However, for photographers who embrace the square format, 6x6 is one of the most enjoyable ways to shoot film.

6x7 medium format cameras

6x7 is often called the “ideal format” because its proportions are close to common print sizes. A 6x7 negative is large, detailed and excellent for enlargements. It is particularly popular for portraits, landscapes, studio photography and fine art work.

The image quality can be outstanding, but 6x7 cameras are usually larger and heavier. You also get around 10 shots per roll, so each exposure costs more than 645 or 6x6. Some 6x7 systems are easy enough to handhold, while others are better suited to tripod use, especially when working slowly with precise focus.

Choose 6x7 if you want:

• A large negative with superb scanning and printing potential

• A natural rectangular shape without heavy cropping

• Excellent results for portraits, studio work and landscapes

• A serious medium format system where image quality is the priority

6x7 is best for photographers who do not mind a bigger camera and fewer frames per roll. If you want the most portable medium format option, it may not be the first choice. If you want rich negatives that enlarge beautifully, it is hard to beat.

What about 6x9?

6x9 is less common than 645, 6x6 and 6x7, but it is worth mentioning. It produces a very large rectangular negative, usually with only 8 shots per roll. Many 6x9 cameras are folding cameras, which means they can be surprisingly compact when closed despite producing a huge negative.

A 6x9 folder can be a wonderful landscape or travel camera, but it is usually slower to use than a modern SLR-style medium format camera. Focusing, film advance and exposure may be fully manual. For photographers who enjoy simple mechanical cameras, that can be part of the charm.

TLR vs SLR vs folding camera

Medium format cameras come in several different designs. The right design depends on whether you value portability, lens choice, close focusing, speed, quietness or simplicity.

Twin-lens reflex cameras

A TLR, or twin-lens reflex camera, has two lenses stacked vertically. The upper lens is used for viewing and focusing, while the lower lens takes the photograph. You usually compose through a waist-level finder on the top of the camera.

TLRs are strongly associated with 6x6 photography. Many are beautifully built, quiet, compact for their negative size and very pleasant to use. The viewing experience is different from an SLR: the image on the focusing screen is usually laterally reversed, so movement appears left-to-right reversed until you become used to it.

Advantages of a TLR include:

• Quiet operation with minimal vibration

• Clear waist-level composing

• Often lighter than modular SLR systems

• Classic square format shooting

• Excellent for portraits, street scenes, documentary work and still life

Things to consider:

• Most TLRs have fixed lenses

• Close focusing can be limited without accessories

• Parallax error can matter at close distances because the viewing and taking lenses are separate

• The reversed finder image takes practice

If you like the idea of a classic square camera, have a look at our Rollei cameras, as Rollei is one of the most respected names in TLR and medium format design.

Single-lens reflex medium format cameras

An SLR medium format camera uses one lens for both viewing and taking the photograph. Light passes through the lens to a mirror and focusing screen, then the mirror moves when you take the picture. This is similar in principle to a 35mm SLR, but the cameras and negatives are larger.

Medium format SLRs are popular because they are versatile. Many systems offer interchangeable lenses, interchangeable finders, interchangeable film backs, close-focusing options and accessories for studio or location work. Brands such as Mamiya are especially well known for practical, professional medium format systems.

Advantages of a medium format SLR include:

• Accurate through-the-lens viewing

• Interchangeable lenses on many systems

• Good close-focusing ability compared with many TLRs

• Choice of waist-level or prism finders on some models

• Strong system support for portraits, studio work and landscapes

Things to consider:

• Usually larger and heavier than TLRs or folding cameras

• Mirror movement can create more vibration and noise

• Some systems are modular, so condition and completeness matter

• Lenses, backs and accessories can add to the overall cost

If you want a practical system camera with a strong reputation for medium format work, browse our Mamiya cameras.

Folding medium format cameras

Folding cameras use a lens and bellows that fold into the camera body when not in use. Many vintage folding cameras use 120 film, and some produce large 6x6, 6x7 or 6x9 negatives while remaining surprisingly pocketable when closed.

A folding camera can be a brilliant choice if you want the largest negative in the smallest package. However, they are often more manual and slower to operate than SLR or TLR cameras. You may need to estimate distance, use an uncoupled rangefinder, set exposure manually and wind the film using frame numbers in a red window.

Advantages of folding cameras include:

• Excellent portability for the negative size

• Simple mechanical operation

• Large negatives from relatively compact bodies

• Classic vintage handling and styling

Things to consider:

• Bellows must be light-tight and in good condition

• Viewfinders can be small and basic

• Focusing may be slower than on SLRs or TLRs

• Lens choice is usually fixed

If portability and vintage character appeal to you, explore our folding cameras.

Waist-level finders vs prism finders

The finder changes the entire feel of a medium format camera. Two cameras using the same film format can feel completely different depending on whether you use a waist-level finder or a prism finder.

Waist-level finders

A waist-level finder is viewed from above. You hold the camera around chest or waist height and look down onto the focusing screen. This is common on TLRs and many modular SLR systems.

Waist-level finders are excellent for careful composition. They can make portraits feel less confrontational because you are not raising the camera directly to your eye. They also encourage a slower, more thoughtful approach.

The main adjustment is that many waist-level finders show a laterally reversed image. If your subject moves left, it may appear to move right on the screen. This feels odd at first, but most photographers adapt with practice.

Waist-level finders are ideal if you enjoy:

• Slow, careful composition

• Portrait sessions with a more relaxed camera position

• Square format photography

• Viewing a large, bright focusing screen

Prism finders

A prism finder lets you hold the camera to your eye, more like a 35mm SLR. On some medium format systems, prism finders also include built-in light meters. They are useful for handheld work, vertical compositions and faster shooting.

The trade-off is weight. A prism can make a medium format camera noticeably heavier, especially on already substantial 6x7 systems. However, if you want a more familiar shooting experience, a prism finder can make medium format feel much more natural.

Prism finders are ideal if you prefer:

• Eye-level shooting

• Faster handling

• More familiar SLR-style composition

• Potential built-in metering, depending on the model

Medium format lenses: what to look for

Medium format lenses are a major part of the appeal. Because the negative is larger, focal lengths behave differently from 35mm. For example, an 80mm lens on 6x6 is often considered a standard lens, while on 35mm an 80mm lens would be a short telephoto. The field of view depends on the film format.

Common medium format lens types include:

• Wide-angle lenses for landscapes, interiors and environmental portraits

• Standard lenses for general use and natural perspective

• Portrait lenses for flattering head-and-shoulders work

• Macro or close-up lenses for product photography, flowers and detailed subjects

When comparing lenses, consider more than maximum aperture. Many medium format cameras are used at f/5.6, f/8 or f/11, where lenses can be extremely sharp. A fast lens can help with focusing and shallow depth of field, but depth of field is already thinner on medium format than on 35mm at equivalent framing.

For older cameras, lens condition is crucial. Look for clear optics, smooth focusing, clean aperture blades and accurate shutter speeds if the shutter is built into the lens. Haze, fungus, separation or sticky shutters can affect performance, so buying from a specialist vintage camera seller gives extra reassurance.

Portability: be honest about how you shoot

Medium format cameras range from genuinely portable to very heavy. A folding 120 camera can slip into a coat pocket. A 645 SLR may be comfortable for a day out. A modular 6x7 system with prism finder and multiple lenses can become a serious bag of equipment.

Before choosing a camera, think about where you will actually use it:

• For travel, consider 645, compact 6x6 TLRs or folding cameras

• For portraits at home or in the studio, a larger SLR system may be worthwhile

• For landscapes, weight matters if you walk long distances, but negative size may be worth it

• For casual everyday shooting, choose something you will genuinely carry

The best medium format camera is not always the one with the largest negative. It is the one you enjoy using enough to take out regularly.

Scanning and enlargement benefits

One of the biggest reasons to choose a medium format film camera is the quality of the negative. Even a modest 120 film camera can produce a negative with far more usable information than 35mm. When scanned well, medium format images can show beautiful detail, subtle colour transitions and very smooth grain.

For printing and enlargement, medium format gives you more room to work. A 6x7 negative can produce large prints with excellent detail, while a 6x6 or 645 negative still offers a meaningful improvement over 35mm. If you plan to make wall prints, sell prints, crop images or scan at high resolution, medium format is a strong choice.

That said, the final result depends on the whole process: accurate focus, steady technique, lens quality, film choice, development and scanning. Medium format is more forgiving in grain and enlargement, but it still rewards careful shooting.

Metering and exposure

Some medium format cameras have built-in light meters, while others are fully mechanical with no meter at all. Neither option is automatically better. A built-in meter is convenient, especially for handheld shooting, but an external handheld meter or a reliable phone meter app can work very well.

When buying, check how the camera meters:

• Does it have no meter, a simple meter, or through-the-lens metering?

• Does the meter require batteries that are still available?

• Is the meter known to be accurate?

• Can the camera still operate mechanically if the meter is not used?

For beginners, a camera with a working meter can be reassuring, but do not dismiss meterless cameras. Many classic 120 film cameras are simple, reliable and enjoyable once you learn basic exposure.

Condition checklist when buying a vintage medium format camera

Medium format cameras are often decades old, so condition matters. A camera that looks attractive on the outside may still need careful checking. Important areas include:

• Shutter speeds: they should fire consistently, especially slower speeds

• Lens condition: check for haze, fungus, scratches, separation and oily aperture blades

• Film advance: the camera should wind smoothly and space frames correctly

• Light seals: foam seals may need replacing on some cameras

• Bellows: folding cameras must have light-tight bellows with no pinholes

• Focusing screen: it should be usable, clean enough and properly seated

• Viewfinder: brightness and clarity make a big difference to focusing

• Film backs: modular cameras need backs that seal properly and advance correctly

• Rangefinder accuracy: on rangefinder folders, focus alignment should be checked

Because film, development and scanning costs add up, it is worth starting with a camera that has been properly checked. A reliable body will save frustration and help you enjoy the medium format experience from the first roll.

Which medium format camera is best for beginners?

For most beginners, 645 or 6x6 is the most approachable starting point. 645 gives more shots per roll and often feels familiar if you are used to 35mm SLRs. 6x6 gives the classic medium format look and is available in many simple, enjoyable TLR and folding designs.

A beginner should usually prioritise:

• Reliable operation over rare features

• A clear finder that is easy to focus

• A standard lens in good condition

• A format that matches how often they want to shoot

• A camera they are comfortable carrying

If you want the most economical route into medium format, look at 645. If you want the classic waist-level square experience, look at a 6x6 TLR. If you want maximum negative size and do not mind slower operation, consider 6x7 or a 6x9 folding camera.

Recommended format by shooting style

Frequently asked questions

Is medium format better than 35mm film?

Medium format gives a larger negative, so it can produce more detail, smoother grain and better enlargements than 35mm. However, 35mm cameras are usually smaller, faster and more economical. Medium format is not simply “better”; it is better for photographers who value image quality and a slower, more deliberate process.

Can I still buy 120 film?

Yes, 120 film is still available in colour negative, black and white, and some slide film options. It can be developed by many film labs, and home development is also possible, particularly for black and white film.

Is 120 film the same as medium format?

120 film is the roll film used by most medium format cameras, but “medium format” refers to the camera and negative size. A 120 film camera can produce different frame sizes depending on its design, such as 645, 6x6, 6x7 or 6x9.

Is 645 really medium format?

Yes. 645 is medium format. Although it is smaller than 6x6 or 6x7, its negative is still much larger than 35mm and offers a clear improvement in detail and tonality.

Why do some medium format cameras have fewer shots per roll?

All 120 rolls have the same film length, but the camera determines the frame size. Larger frames take up more film. That is why a 645 camera may give 15 or 16 shots, while a 6x7 camera gives around 10 and a 6x9 camera gives around 8.

Should I choose a TLR or an SLR?

Choose a TLR if you want a quiet, classic, waist-level camera and are happy with a fixed lens. Choose an SLR if you want through-the-lens viewing, interchangeable lenses and more system flexibility. Both can produce excellent results.

Are folding cameras good for beginners?

They can be, especially if you enjoy simple manual cameras. However, they often require more patience than SLRs or TLRs. Make sure the bellows are light-tight, the shutter works properly and the focusing method suits you.

Final thoughts: choosing your medium format camera

Medium format film photography is about more than bigger negatives. It changes your pace, your handling and the way you compose. A 645 camera gives a practical and economical route into 120 film. A 6x6 camera offers the classic square medium format experience. A 6x7 camera provides a large, beautiful negative for serious printing and scanning. A TLR gives quiet waist-level charm, an SLR gives flexibility, and a folding camera gives remarkable portability with unmistakable vintage character.

Start by choosing the format that suits your shooting style, then consider the camera design you will most enjoy using. Once you know whether you want 645 efficiency, 6x6 balance, 6x7 detail or a compact folder, comparing individual cameras becomes much easier.

When you are ready to explore options, browse our full collection of 120 film medium format cameras and choose a camera that fits both your photographs and the way you like to shoot.