Asahi Pentax K1000

35mm MF film SLR camera

Specification

Production details
Announced:June 1976
System: Pentax K (1975)
Imaging plane
Maximum format:35mm full frame
Mount and Flange focal distance:Pentax K [45.5mm]
Imaging plane:36 × 24mm film
Shutter
Type:Focal-plane
Model:Mechanical
Speeds:1 - 1/1000 + B
Exposure
Exposure metering:Through-the-lens (TTL)
Exposure modes:Manual
Physical characteristics
Weight:620g
Dimensions:143x91.5x49mm

Manufacturer description #1

TYPE: 35mm SLR with built-in through-the-lens exposure meter

FILM AND NEGATIVE SIZE: 35mm film. 24mm x 36mm

SHUTTER: Rubberized silk focal plane shutter. Speeds: B, 1 to 1/1000 sec.

VIEWFINDER: Pentaprism finder with cross-microprism or split-image focusing screen. 0.88x magnification with 50mm standard lens focused at infinity. Dioptry -1.0

REFLEX MIRROR: Instant-return type with special shock absorbers for minimum vibration

LENS MOUNT: Pentax bayonet mount

FILM ADVANCE: Ratchet-type rapid-wind lever. 160° throw and 10° play. "Cocked" indicator alongside shutter release button

EXPOSURE COUNTER: Automatic reset

FILM REWIND: Rapid-rewind crank for speedy film take-up

FLASH SYNCHRONIZATION: X contact hot shoe for cordless flash connection. X synchronization at 1/60 sec.

EXPOSURE METER: CdS meter measures the average brightness of the ground glass at full aperture, and couples directly to aperture, shutter and film speed settings. Zero-method exposure control. Film speed from 20 to 3200 ASA/ISO. EV 3 - 18 with ASA/ISO 100 film. Powered with one 1.5V alkaline (LR44) or silver oxide (G13) battery. Built-in photoswitch

Manufacturer description #2

As the K Series model entailing the smallest investment, the K 1000 represents the ideal way of getting acquainted with Pentax photography. Proudly bearing the Pentax name, it retains all the essential features of a quality camera.

System camera

Sharing the same mount as the other members of the K family, the K 1000 can use anyone of the superb SMC Pentax lenses and accessories available. It comes with a fast f/2 55mm lens which makes it possible to shoot brightly-lit interiors and city streets at night without flash. And for those occasions when desiring to use an electronic flash unit, there is a "hot shoe" for cordless operation as well as an X-sync PC terminal for use with cords.

Correct exposures assured

Simply removing the lens cap automatically turns on the highly accurate metering system which can be instantly adjusted for correct exposure by merely aligning the indicator needle between the two brackets visible in the viewfinder. Focusing, composing, and viewing are simplified by the large, bright focusing screen of the K 1000.

And since all exposure adjustments are made at full aperture, the viewfinder never grows dark.

Renowned Pentax shutter

The K 1000 employs a rubberized silk focal plane shutter developed by Pentax for optimum durability and accuracy. A complete shutter speed range is provided, from a brief 1/1000 sec. to "freeze action" to a long 1 sec. for dimly-lit scenes.

Handling ease

Both the elimination of mirror vibration by the shock absorbers incorporated into the camera body and the texturized body surface of the K 1000 assist the photographer in holding the camera rock-steady. A large, upraised alignment dot appears on each SMC Pentax lens for instant matching of body and lens, and a slight twist securely locks the lens into place; attaching lenses was never easier.

Features galore

Whether you are using a slow reversal film or "pushing" fast film to its limit, the K 1000 can handle it, for it has an extensive ASA range of 20 - 3200. Moreover when the film is transported, the "Shutter-Cocked Indicator" automatically turns red warning the photographer not to depress the shutter release button unless intending to take a picture. And, of course, each time the film is transported, the exposure counter advances one notch informing the user of the number of exposures already taken.

Upon opening the camera back, the exposure counter automatically returns to the "start" position.

Manufacturer description #3

Here is an inexpensive camera capable of taking high quality pictures along with the best of them. Precision-wide, the Pentax K 1000 is the same basic camera as top-of-the-line Pentax 35mm SLR cameras and maintains the same essential features. The only difference is that some of the extras which do not affect picture-taking quality have been removed to permit cost reduction. The net result is a high performance camera at lower prices and offering the full system benefits of the more expensive cameras as well.

Like its peers, the K 1000 accepts the complete line of SMC Pentax interchangeable lenses, which have made the name Pentax famous the world over with their remarkable quality and color rendition. The standard lens supplied with the K 1000 is a fast 50mm f/2 SMC Pentax-M lens which with today's extra-fast ASA 400 color films will even permit you to take pictures indoors under a small room lamp, or on a city street at night without a flash.

Another bargain feature of the K 1000 is its highly durable Pentax rubberized silk focal-plane shutter which is capable of "freezing the action" at speeds as fast as 1/1000 second. Flash synchronization is also featured for times when you would want to use a flash unit such as when using fine-grained film with a slow ASA film speed.

In addition, the K 1000 features an elegant-yet-rugged body design which is geared toward ultimate ease-of-operation. The texturized non-slip surface provides a secure grip, while rounded edges and a bevelled base plate assure that the camera rest comfortably in your hands.

The controls are well-positioned for easy manipulation and are concentrated on the right side of the camera, leaving your left hand free to operate the lens aperture ring. A "soft touch" shutter release button works in concert with shock absorbers which cushion impact on mirror-return to ensure blur-free pictures.

The true bargain feature of the K 1000, however, lies with the viewfinder and exposure metering system. The large, bright uncluttered viewfinder is ideal for quick and easy focusing. And, the highly accurate CdS cell metering system equals those found on cameras costing twice as much. Once you have the needle centered between the brackets, simply cock the shutter, focus and shoot, for perfect exposures from your very first roll.

For persons with a limited budget, who are seeking beautiful results, or for the casual photographer who wants high-quality results without the bother of a more complex camera.

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35mm full frame

43.27 24 36
  • Dimensions: 36 × 24mm
  • Aspect ratio: 3:2
  • Diagonal: 43.27mm
  • Area: 864mm2

Travellers' choice

Note

Among autofocus lenses designed for 35mm full-frame mirrorless cameras only. Speed of standard and telephoto lenses is taken into account.

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Cannot compare the lens to itself.

Image stabilizer

A technology used for reducing or even eliminating the effects of camera shake. Gyro sensors inside the lens detect camera shake and pass the data to a microcomputer. Then an image stabilization group of elements controlled by the microcomputer moves inside the lens and compensates camera shake in order to keep the image static on the imaging sensor or film.

The technology allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without image stabilizer you have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.

Original name

Lens name as indicated on the lens barrel (usually on the front ring). With lenses from film era, may vary slightly from batch to batch.

Format

Format refers to the shape and size of film or image sensor.

35mm is the common name of the 36x24mm film format or image sensor format. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43mm. The name originates with the total width of the 135 film which was the primary medium of the format prior to the invention of the full frame digital SLR. Historically the 35mm format was sometimes called small format to distinguish it from the medium and large formats.

APS-C is an image sensor format approximately equivalent in size to the film negatives of 25.1x16.7mm with an aspect ratio of 3:2.

Medium format is a film format or image sensor format larger than 36x24mm (35mm) but smaller than 4x5in (large format).

Angle of view

Angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.

As the focal length changes, the angle of view also changes. The shorter the focal length (eg 18mm), the wider the angle of view. Conversely, the longer the focal length (eg 55mm), the smaller the angle of view.

A camera's angle of view depends not only on the lens, but also on the sensor. Imaging sensors are sometimes smaller than 35mm film frame, and this causes the lens to have a narrower angle of view than with 35mm film, by a certain factor for each sensor (called the crop factor).

This website does not use the angles of view provided by lens manufacturers, but calculates them automatically by the following formula: 114.6 * arctan (21.622 / CF * FL),

where:

CF – crop-factor of a sensor,
FL – focal length of a lens.

Mount

A lens mount is an interface — mechanical and often also electrical — between a camera body and a lens.

A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock type. Modern camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body, unlike screw-threaded mounts.

Lens mounts of competing manufacturers (Canon, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance can also be different.

The flange focal distance (FFD) is the distance from the mechanical rear end surface of the lens mount to the focal plane.

Lens construction

Lens construction – a specific arrangement of elements and groups that make up the optical design, including type and size of elements, type of used materials etc.

Element - an individual piece of glass which makes up one component of a photographic lens. Photographic lenses are nearly always built up of multiple such elements.

Group – a cemented together pieces of glass which form a single unit or an individual piece of glass. The advantage is that there is no glass-air surfaces between cemented together pieces of glass, which reduces reflections.

Focal length

The focal length is the factor that determines the size of the image reproduced on the focal plane, picture angle which covers the area of the subject to be photographed, depth of field, etc.

Speed

The largest opening or stop at which a lens can be used is referred to as the speed of the lens. The larger the maximum aperture is, the faster the lens is considered to be. Lenses that offer a large maximum aperture are commonly referred to as fast lenses, and lenses with smaller maximum aperture are regarded as slow.

In low-light situations, having a wider maximum aperture means that you can shoot at a faster shutter speed or work at a lower ISO, or both.

Closest focusing distance

The minimum distance from the focal plane (film or sensor) to the subject where the lens is still able to focus.

Closest working distance

The distance from the front edge of the lens to the subject at the maximum magnification.

Magnification ratio

Determines how large the subject will appear in the final image. For example, a magnification ratio of 1:1 means that the image of the subject formed on the film or sensor will be the same size as the subject in real life. For this reason, a 1:1 ratio is often called "life-size".

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Electronic manual focus override is performed in the following way: half-press the shutter button, wait until the camera has finished the autofocusing and then focus manually without releasing the shutter button using the focusing ring.

Electromagnetic diaphragm control system

Provides highly accurate diaphragm control and stable auto exposure performance during continuous shooting.

Manual diaphragm

The diaphragm must be stopped down manually by rotating the detent aperture ring.

Preset diaphragm

The lens has two rings, one is for pre-setting, while the other is for normal diaphragm adjustment. The first ring must be set at the desired aperture, the second ring then should be fully opened for focusing, and turned back for stop down to the pre-set value.

Semi-automatic diaphragm

The lens features spring mechanism in the diaphragm, triggered by the shutter release, which stops down the diaphragm to the pre-set value. The spring needs to be reset manually after each exposure to re-open diaphragm to its maximum value.

Automatic diaphragm

The camera automatically closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.

Fixed diaphragm

The aperture setting is fixed at F/ on this lens, and cannot be adjusted.

Number of blades

As a general rule, the more blades that are used to create the aperture opening in the lens, the rounder the out-of-focus highlights will be.

Some lenses are designed with curved diaphragm blades, so the roundness of the aperture comes not from the number of blades, but from their shape. However, the fewer blades the diaphragm has, the more difficult it is to form a circle, regardless of rounded edges.

At maximum aperture, the opening will be circular regardless of the number of blades.

Weight

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

Maximum diameter x Length

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

For lenses with collapsible design, the length is indicated for the working (retracted) state.

Weather sealing

A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it is properly sealed against dust and moisture.

Lenses that accept front mounted filters typically do not have gaskets behind the filter mount. It is recommended to use a filter for complete weather resistance when desired.

Fluorine coating

Helps keep lenses clean by reducing the possibility of dust and dirt adhering to the lens and by facilitating cleaning should the need arise. Applied to the outer surface of the front and/or rear lens elements over multi-coatings.

Filters

Lens filters are accessories that can protect lenses from dirt and damage, enhance colors, minimize glare and reflections, and add creative effects to images.

Lens hood

A lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.

The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood.

Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.

Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. In addition, lens hoods can offer some degree of physical protection for the lens due to the hood extending farther than the lens itself.

Teleconverters

Teleconverters increase the effective focal length of lenses. They also usually maintain the closest focusing distance of lenses, thus increasing the magnification significantly. A lens combined with a teleconverter is normally smaller, lighter and cheaper than a "direct" telephoto lens of the same focal length and speed.

Teleconverters are a convenient way of enhancing telephoto capability, but it comes at a cost − reduced maximum aperture. Also, since teleconverters magnify every detail in the image, they logically also magnify residual aberrations of the lens.

Lens caps

Scratched lens surfaces can spoil the definition and contrast of even the finest lenses. Lens covers are the best and most inexpensive protection available against dust, moisture and abrasion. Safeguard lens elements - both front and rear - whenever the lens is not in use.