Pentax slr - 645 كاميرا عاكسة متعددة الأنماط .. مجلة فن التصوير اللبنانية _ ع٣٦

PENTAX SLR - 645 Multi-Pattern Reflex Camera

Among the medium-bodied cameras, we stand at the Pentax 645, a reflex that puts at the disposal of the photographer the latest features of reflex cameras, as it features seven electronic exposure modes with an implicit drive motor and responsive electronic controls. And flash (TTL) automatic.

Pentax 645, this is designed for shooting at eye level. This is in addition to the possibility of producing a dimension of photographic splendor, which can only be recognized with medium and large format cameras. The camera also features two aperture systems: (AE1), with which the lens is placed on the automatic (A) signal, with the desired aperture being selected with the selection buttons.
And (AE2), where the aperture is set manually while rotating the aperture ring on the lens. In both cases, the required shutter speed is set automatically. With the use of the first system, the aperture and shutter speed information appears in the viewfinder and the (LCD) window, with 645 lenses.

As for the second system, it can be used with the lenses of the Pentax 67 system, and there is a viewfinder that allows the photographer to predetermine the depth of field, with this system (AE2).
This and the (AE) system for shutter optimization works in a typical way when we want to send special effects with movement, either to freeze a moment in time or from movement over the image, and here we set the lens to 1/1000 second up to 15 seconds by selecting buttons, and so on (8 ) And we choose the speed from the camera. The camera automatically selects the appropriate aperture the moment the shutter is triggered.
In order to achieve comprehensive adjustment of all exposure elements, it is necessary to use the calibrated manual system, and here we have to choose a stop F, with the aperture ring on the lens and the shutter speed with the selection buttons, and the shutter speed will appear in the viewfinder with the expression (OK) in the case of correct exposure, or plus numbers And minus according to the number of stops required in the case of incorrect exposure.

- the flash
In the automatic TTL flash model, there is a sensor within the camera body that measures the flash output with the light transmitted through the lens to this film flat. The flash flash reaches its end Nikia when an appropriate amount of light reaches this film and with the use of the automatic TTL flash with preferred aperture systems ( AE2) or the calibrated Bedouin, pictures can be taken with the flash at any f / f stop in order to achieve accurate adjustment of the depth of field in terms of the shutter synchronization speed automatically, and it is fixed at 1/60 of a second.

- Painting design
All electronic controls in - Pentax 645. Efficiently arranged on the top panel of the body for easy reach during shooting, the left palm panel contains buttons for action model, aperture positions, and exposure compensation (EF+). These controls are operated by selection buttons located between the right palm panel and the shutter release button, and it is possible to set all controls within a moment without moving the two cuffs from the capture site.

The left palm panel also contains the on and off switches, and the right palm panel, in addition to the selector buttons, has a large LCD readout for all vital information related to working mode, aperture, shutter speed, flash mode, and shutter location.

The main power switch is located between the selection buttons and the shutter release, provided that turning off the power to the battery does not cancel the previous settings.

- Specifications
The Pentax 645 is a 6x4.5 brown SLR camera with multi-format automatic exposure controls, with an implicit motor drive.
- It works with a movie of 120-15 exposures - or with a movie of 220-30 exposures - and these two films are installed with a start signal.
- 70 mm film - approximately 90 exposures - and it is installed automatically. image scale. 56 x 5.41 mm.
- Flat focal cloth shutter that moves vertically and adjusts electronically, from 15 to 1/1000 second and 1/60 second and (B) and an electromagnetic shutter release. - - LED indication of aperture with shutter speeds and exposure factor warning.

- There are LED displays that indicate all functions in the camera.
- Telescopic viewfinder with a bisected image, and it is of the type Keplarian, with an instant return mirror.
- Automatic film rewinding with motor drive and pick-up systems, single / consecutive.
- Multiple exposure with the possibility of canceling, and focused (TTL) calibration, which is done by (GPD) cells and calibration outside the film for specialized automatic electronic (TTL) flashes.
Six 1.5-volt batteries (88) are the power source for this camera.
- Measures 147 mm thick - 109 mm high -
Length 117 mm - including the height of the film holder and handle 645 - Weight: 1320 grams with lithium battery, film holder and handle 645 ⏹