# Types of Camera

Photography I · Photographic Language and the Taking of the Image · https://tryals.app/learn/photography-i/types-of-camera

## The Same Optics, Six Different Problems

Every camera is a light-tight box with a lens and a sensitive surface. The differences lie in **how the photographer sees what the lens is doing**.

| Type | Viewfinder system | Main benefit | Main cost |
|---|---|---|---|
| **View camera** | Ground glass at film plane | Plane adjustment | Slow, heavy |
| **Twin-lens reflex** | Separate viewing lens | Always visible | Parallax error |
| **Rangefinder** | Optical window and patch | Compact, quiet | Parallax, no depth view |
| **Single-lens reflex** | Taking lens via mirror | Exact framing | Mirror noise, blackout |
| **Mirrorless** | Electronic sensor feed | Live exposure | High battery drain |
| **Compact and phone** | Rear screen | Always available | Small sensor |

### View Camera Movements

**Its** defining feature is **movements**, which adjust the lens and film planes independently:

- **Shift and rise** prevent converging verticals on tall buildings.
- **rise and fall** translate the lens vertically.
- **shift** translates the lens sideways.
- **Tilt** rotates a plane about a horizontal axis.
- **swing** rotates a plane about a vertical axis.

**Tilt** relies on the **Scheimpflug principle**. When lens, film, and subject planes intersect along one line, entire receding planes stay sharp without stopping down.

### Format and Film Area

Larger formats require less enlargement. They yield finer grain and smoother tonal gradations at the cost of bulk.

| Format | Frame | Area | Frames |
|---|---|---|---|
| **35** mm | **24** × **36** mm | **864** mm² | **36** |
| **645** | **41.5** × **56** mm | **2324** mm² | **15** on **120** |
| 6 × 6 | **56** × **56** mm | **3136** mm² | **12** on **120** |
| 6 × 7 | 56 × 70 mm | 3920 mm² | 10 on 120 |
| 4 × 5 in | 95 × 120 mm | 11400 mm² | 1 per sheet |

> **Common pitfall:** Calling the rangefinder universally "more accurate" than an SLR. Rangefinder patches excel with wide lenses in dim light. However, they suffer from parallax and cannot show real depth of field.

## Practice questions

8 of this lesson's 13 practice questions, with answers. The full set is in the app.

### 1. A photographer needs the near edge of a long table and the far wall behind it both sharp at f/5.6. How does a view camera achieve that when a 35 mm camera at the same aperture cannot?

A. A ground-glass back lets the photographer visually verify and split focus between both points
B. Larger sheet film needs less enlargement, giving deeper acceptable depth of field at f/5.6
C. View camera lenses provide an inherently wider optical depth of field at matched apertures
D. Tilting the lens swings the focus plane along the subject, placing both points in sharp focus

**Answer:** D. Tilting the lens swings the focus plane along the subject, placing both points in sharp focus

**Why:** Tilt rotates the plane of focus. Under Scheimpflug the subject plane, lens plane and film plane meet on a common line, so tilting the lens forward lays the plane of sharpness along the table. The wedge is no wider than before, it has simply been put where the subject is, which no fixed-plane camera can do.

Page: https://tryals.app/practice/photography-i/types-of-camera/a-photographer-needs-the-near-edge-of-a-long-table-and-the-far-wall

### 2. The Scheimpflug principle states that the subject plane, the lens plane and the film plane meet along a common line when the whole subject plane is sharp.

**Answer:** True

**Why:** **True**, and the practical reading is what matters: the plane of sharp focus is not locked parallel to the film. Tilt the lens and the plane swings, which is how a view camera lays sharpness along a receding surface without stopping down into diffraction.

Page: https://tryals.app/practice/photography-i/types-of-camera/the-scheimpflug-principle-states-that-the-subject-plane-the-lens

### 3. Complete the account of camera mechanisms.

**Answer:** The error by which a twin-lens reflex frames slightly differently from what it records is called **parallax**. The view camera movement that rotates the plane of sharp focus is **tilt**, and the one that corrects converging verticals is **rise**. The frame of a 6 by 6 negative measures 56 millimetres by **56** millimetres.

**Why:** The last blank is worth noticing: the nominal name 6 × 6 refers to centimetres of a rounded roll-film width, and the real frame is 56 by 56 millimetres. Nominal format names are almost always larger than the negatives they describe, which is why they should never be used in an area calculation.

Page: https://tryals.app/practice/photography-i/types-of-camera/complete-the-account-of-camera-mechanisms

### 4. The fundamental distinction among camera designs lies in how the photographer monitors the image formed by the lens. What operational consequence follows when a system decouples the viewing optical path from the recording surface?

A. Exact focus is rendered unachievable at wide apertures
B. Image plane tilt cannot be corrected using the lens mount
C. Depth of field cannot be directly inspected before capture
D. Exposure adjustments will fail to record on the sensor feed

**Answer:** C. Depth of field cannot be directly inspected before capture

**Why:** Systems like rangefinders and TLRs decouple viewing from capture, meaning preview aids like depth-of-field rendition cannot be assessed through the taking optics. Parallax or separate optical windows isolate the photographer from true focal depth behaviour.

Page: https://tryals.app/practice/photography-i/types-of-camera/the-fundamental-distinction-among-camera-designs-lies-in-how-the

### 5. Which are true of parallax error?

A. It affects the single-lens reflex more than any other type
B. It arises when the viewing path and the taking path are optically separate
C. It affects the twin-lens reflex and the rangefinder
D. It grows worse as the subject comes closer to the camera

**Answer:** B. It arises when the viewing path and the taking path are optically separate; C. It affects the twin-lens reflex and the rangefinder; D. It grows worse as the subject comes closer to the camera

**Why:** The fourth reverses the fact. The reflex mirror exists precisely to remove parallax by showing the taking lens's own image, which is why reflexes took over close-up, macro and long-lens work while rangefinders kept the wide and normal reportage ground.

Page: https://tryals.app/practice/photography-i/types-of-camera/which-are-true-of-parallax-error

### 6. Match each camera type to the working situation it suits best.

**Answer:**

- View camera → Architecture and studio still life, where the planes must be controlled
- Rangefinder → Quiet reportage with wide and normal lenses in poor light
- Single-lens reflex → Close-up and long-lens work, where framing must be exact
- Phone camera → The picture that would not otherwise have been taken at all

**Why:** The last pairing is not a joke. The decisive advantage of a phone camera is availability, and availability has changed what photography is about more than any optical development since the roll film, which is a claim about the medium rather than about image quality.

Page: https://tryals.app/practice/photography-i/types-of-camera/match-each-camera-type-to-the-working-situation-it-suits-best

### 7. Arrange these formats in order of increasing negative area.

**Answer:**

1. 35 mm
2. 645
3. 6 × 6
4. 6 × 7
5. 4 × 5 inch

**Why:** The run from 864 to 11400 square millimetres is a factor of about thirteen in area, or three and a half stops of enlargement advantage. That is the entire argument for large format, and the entire argument against it is that you carry it on your back and get one frame per sheet.

Page: https://tryals.app/practice/photography-i/types-of-camera/arrange-these-formats-in-order-of-increasing-negative-area

### 8. Parallax error affects the single-lens reflex because its viewing and taking paths are separate.

**Answer:** False

**Why:** **False**, and backwards. The reflex mirror intercepts the taking lens's own image, so what the photographer frames is what the film records. Parallax belongs to the twin-lens reflex and the rangefinder, which look through a separate window a few centimetres away.

Page: https://tryals.app/practice/photography-i/types-of-camera/parallax-error-affects-the-single-lens-reflex-because-its-viewing-and