نيكون ( f - 501 ) ثنائية التركيز ، دون تغییر لحامل العدسة .. مجلة فن التصويراللبنانية

Nikon (F-501) dual focus, without changing the lens mount

Nippon Kugaku announces a new innovation in the design of its 35mm autofocus reflex camera, the Nikon F-501 as the first motorized reflex (SLR) camera with dual autofocus integrated into the camera body, while Nikon's proven bayonet mount remains without change.

Detailed features

⏺ Implicit AF motor for dual auto focus - Servo focus priority (Single AF) for point-and-shoot photography, safe from error.
⏺ New AF Nikkor lenses, a wide new series of compact and lightweight autofocus lenses that are also compatible with non-AF Nikon cameras, including AL cameras.
⏺ A new AF adapter (TC 16A) gives automatic focus power to more than 30 selected Nikkor lenses and (E) series lenses.
⏺ Automatic focus flash speedlite, new is (SB-20) with an implicit AF illumination for very accurate focus even in the dark.
⏺Automatic exposure with aperture priority for total depth-of-field adjustment complemented by manual override with a choice of 12 shutter speeds plus (B).
⏺ Implicit push engine to automatically render the movie at a rate of up to two and a half frames per second.
⏺ The two-piece aluminum body is molded into a mold that confirms the durability and ease of maintenance of the camera; It is designed to withstand the harsh conditions of use.
⏺ Signature - Alza, automatic for the speed of the film with the code (DX) is done by leaving the disc at (DX); Error-free design.
⏺ Automatic exposure lock (AE) compensates for the big difference in luster, backlighting, for example, between the subject and the background.
⏺E Exposure compensation dial In order to deliberately override the auto exposure system, it gives exposure compensation from: (EV -) through (EV +) in (IEV) increments.

Specifications
Camera category: 35mm single-lens reflex camera with automatic focus, complete with motor.

Two auto focus systems:
Single servo at (5) and continuous servo at (C) are available with Nikkor lenses (AF): Peda auto focus when the shutter-release button is pressed slightly while the system is selected at (S) or (C).
Single servo auto focus:
The shutter release becomes possible only when the LED indicates that focus has occurred; Once focus is achieved, it locks as long as the shutter-release button is pressed slightly.
Continuous servo auto focus:
Focus detection continues as long as the shutter-release button is depressed slightly; The shutter can be released whenever desired, even if the focus trigger is not on.

Auto focus lock:
Used in the continuous servo automatic focus system; Keeping the button pressed locks focus.

Focus assist: Available on manual focus system with Nikkor AF or Nikkor lens or (E) series with a maximum aperture of f/4.5 or faster: Rotate the lens focus ring, manually in the direction of an arrow (LED) inside the viewfinder .

Exposure meter switch:
Operated by setting the movie forward system selector to (S) or (C) and pressing the shutter-release button slightly; It remains on for about eight seconds after lifting the finger from the button.
The expression range is from (EV) to (9EV) at 100 aza with an f/1.4 lens.

Adjust exposure:
Three-program automatic exposure systems:
Binary, normal. And a great speed, in addition to an automatic exposure system (A) with aperture preference, and a manual exposure system (M).

Program exposure adjustment:
dual, normal, or high speed; As for the shutter speed and aperture, they are automatically predicted. Exposure adjustment by system (8): The shutter speed is expected automatically to match the aperture of its location manually.

Exposure setting (M): predicts aperture and shutter speed manually.
Shutter: a focal plane shutter that moves vertically and is electronically adjusted.

Stepless shutter speeds from 1 to 1/2000 sec. Automatic exposure systems (PDUAL). (A) f. (PHI) and . (P).

Separately adjustable speeds - by oscillating a neubyte night from 1/2000 to 1 second in manual action, and a long exposure that is electronically adjusted at (B) position.

Viewfinder: Fixed pentamirt prismatic lens class at eye level: 0.85× magnification with 50 mm lens signed at infinity; 92 percent coverage, almost of the frame.

The eyepiece cap, model (DK-5), prevents stray light from entering the viewfinder.

Focus screen: Nikon's clear, semi-transparent class (B) screen with focus frames in the middle for automatic focus operation.

⏺ With LED system (A): Shows the shutter speed that the camera chooses automatically; A warning LED flashes at the bottom or top, indicating an exposure that is too low or too high.
⏺ With LED system : ( M ) does not blink displaying the shutter speed set on the dial; And (LED) blinks to show the shutter speed for correct exposure and the indicating (LED) blinks to show the middle shutter speed.
Film speed range: from 25 to 5000 aza for a movie with the code (DX) and from 12 to 3200 aza for a movie without the code (DX).
Film Compounding The film advances to the first frame automatically when the shutter-release button is pressed once: the film advance indicator rotates to show that the film is mounted and advances properly.
Film Advance: The film advances to the frame, 1 - automatically when the shutter-release button is pressed; And at (S) - one frame capture - the movie automatically advances one frame when the shutter button is pressed, and at (C) continuous shooting.

Audible warning sound: while the key is on, sizzling: when using a film without the (DX) symbol while the film speed scale is located on (DX): and when needed
contacts (DX) to clean; And with exposure that is more or less than it should be, and the possibility of blurring the image with automatic exposure systems; And when the language of the film ends; And during
Self-timer operation:
Red indicator light: flashes when using a film without the (DX) symbol while the film speedometer is located at (DX), when the (DX) contacts need to be cleaned, when the language of the film is finished, and when the shutter is released.
Self-timer Ten-color delay in shutter release, electronically controlled; There is a (LED) flashing with a buzzing to indicate that the timer is running. Camera back: Hinged back with window confirming film cartridge and indicating film advance; turn open when the film rewinding handle is pulled upwards; It can be replaced with a Nikon back (MF-19) for multiple information.
Flash synchronization: 1/125 second or slower With electronic flash: and with a specialized Nikon flash unit: It automatically predicts 1/125 second when the camera is set to (P DUAL) or (P HI) or (P). Or (8), or when a manual signature of 1/250 second or more: As for a slower manual speed, the shutter releases at the signed speed.

Flash Ready Light: (LED) strobe in the viewfinder lights up when the Nikon Professional Speedlite flash is ready to fire.
Power source - four batteries of 1.5 V class (88); And with the optional Nikon 88 holder for batteries (3-MB).

Dimensions: 148.5 mm long x 97.5 mm high x 54.5 mm thick Weight: 630 grams approximately⏹