Tokyo Kogaku RE. Auto-Topcor 58mm F/1.4

Standard prime lens • Film era • Discontinued

Sample photos

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Production details

Announced:1963
Production status: Discontinued
Production type:Mass production
Original name:Tokyo Kogaku RE.Auto-Topcor 1:1,4 f=5.8cm
Tokyo Kogaku RE.Auto-Topcor 1:1,4 f=58mm
System: Topcon (1957)

Features highlight

Ultra fast
Auto
MF
Compact

Specification

Optical design
Focal length:58mm
Speed:F/1.4
Maximum format:35mm full frame
Mount and Flange focal distance:Topcon [44.7mm]
Diagonal angle of view:40.9° (35mm full frame)
Lens construction:7 elements - 5 groups
Diaphragm mechanism
Diaphragm type:Automatic
Aperture control:Aperture ring (Manual settings only)
Number of blades:6
Focusing
Closest focusing distance:0.45m
Maximum magnification ratio:<No data>
Focusing method:<No data>
Focusing modes:Manual focus only
Manual focus control:Focusing ring
Physical characteristics
Weight:340g
Maximum diameter x Length:⌀?×49mm
Accessories
Filters:Screw-type 62mm
Lens hood:Bayonet-type 82004 (round)
Teleconverters:Not available

*) Sources of data: Beseler Topcon Accessories booklet ● Beseler Topcon booklet (1966) ● Interchangeable lenses and accessories for Topcon cameras booklet ● Topcon booklet by Paillard Inc ● Beseler Topcon D1 booklet ● Beseler Topcon Super D booklet ● Topcon RE 200 instruction manual ● Topcon RE 200 RE 300 instruction manual ● Topcon RE Super instruction manual ● For a New Dimension in Professional Photography. Topcon Super DM booklet.

**) Some basic information is missing in the specification as it was not provided by the manufacturer.

Manufacturer description

One of the finest and fastest fully automatic optics in this focal length available. Focusing and exposure measurement are made at full aperture. Bayonet lens hood mount.

From the editor

The lens was made by Tokyo Kogaku Kikai K.K. (Japan) for its own Topcon RE Super SLR camera. Cosina (Japan), inspired by lens design and its optical characteristics, made its own version, Auto-Topcor 58mm F/1.4, in a limited batch for M42 thread mount and Nikon F mount.

All RE AUTO TOPCOR lenses have automatic preselection diaphragms and are coupled to the exposure meter. All in common feature from front to back:

  • an internal thread and an external bayonet for accessories;
  • a grooved, wide focusing ring, in black rubber - a TOPCON special, which stands out on the matte chrome finish of the lens barrel and facilitates the focusing operation; the focusing movement over 280 degrees is smooth and very direct; the lenses move linearly;
  • a range scale engraved with meters and foot mark;
  • a depth-of-field table, with infrared photography mark (a R replaces one of the aperture values of the depth of field table; when the lens is fitted with a 25 A filter, the meter seems capable of supplying exposure indications);
  • a matte chrome, grooved diaphragm ring rotating to the left; from full aperture to the most stepped down value over 45 degrees; integer and half-aperture values are indexed; on the latest lenses made, this ring is black with white engravings and is even more visible; the diaphragm blades are treated matte black;
  • a mount reference point.

All engravings are black, except the reference point which is red and the reading mark of all rings which is green.

The mount is of the EXAKTA type (diameter and flange back are identical) but is modified: the preselection is internal. The mating ring surfaces are very well made in steel. Depress the lever at the bottom left of the front side, and turn the lens over 60 degrees counter clockwise to remove it. These operations can be achieved very easily with one hand. The preselection plunger is well protected by the mount. This mount also protects the rear elements very well from possible scratches.

There is no lever for the manual operation of the diaphragm because this is unnecessary:

  • on the camera body, the depth of field test lever does exactly that (but the exposure can only be measured at full aperture);
  • when the lenses are mounted on adaptor rings or bellows, they become manual, because the automatic cam is no longer driven.

The lenses were delivered in leather cases with carrying straps and end caps.

Typical application

landscapes, interiors, buildings, cityscapes, portraits, street, travel

Frequently asked questions (1)

Alternatives in the Topcon system

Sorted by focal length and speed, in ascending order

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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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You are already on the page dedicated to this lens.

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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.

MF

Sorry, no additional information is available.

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".

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/1.4 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.