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Leitz Wetzlar Telyt-S 800mm F/6.3

Super telephoto prime lens • Film era • Discontinued

Features highlight

Preset
MF
R&P
Drop-in filters
Built-in hood
TC

Specification

Production details
Announced:1973
Production status: Discontinued
Production type:Special order
Order No.:11921
Original name:LEITZ WETZLAR TELYT-S 1:6.3/800
System: Leica R (1964)
Optical design
Focal length:800mm
Speed:F/6.3
Maximum format:35mm full frame
Mount and Flange focal distance:Leica R [47mm] (R only)
Minolta SR [43.5mm]
Diagonal angle of view:3.1° (35mm full frame)
Lens construction:3 elements - 1 group
Diaphragm mechanism
Diaphragm type:Preset
Number of blades:<No information>
Focusing
Closest focusing distance:12.5m
Maximum magnification ratio:1:13 at the closest focusing distance
Focusing method:<No information>
Focusing modes:Manual focus only
Manual focus control:Rack-and-pinion mechanism
Physical characteristics
Weight:6860g (Leica R)
Maximum diameter x Length:⌀152×790mm (Leica R)
Weather sealing:-
Fluorine coating:-
Accessories
Filters:Removable front filters are not accepted
Additional features:Drop-in filter holder (Series VII)
Lens hood:Built-in telescopic round
Lens caps:14162 (rear)
Teleconverters: Leitz / Leica APO-Extender-R 1.4X → 1120mm F/8.8
 Leica APO-Extender-R 2X → 1600mm F/12.6
 Leitz / Leitz Wetzlar Extender-R 2x → 1600mm F/12.6

*) Sources of data: Lenses for the LEICA R system booklet (PUB. 111-133) ● Handbook of the LEICA system (PUB. 100-021) (May 1987) ● Electronic-Leica R3 booklet (PUB. 121.111-104) (November 1977) ● Leica R4-MOT booklet (PUB. 121.111-136) (August 1980) ● Handbook of the LEICA system (September 1995).

Manufacturer description #1

For a long time, 400mm was the longest focal length in the LEICA and LEICAFLEX lens range; then about three years ago we introduced a 560mm lens. Now we are about to launch an unusually long focus system which is remarkably fast for its focal length: an 800mm f/6.3.

The new prototype will be available in time for the 1972 Olympic Games. Unlike most long focus lenses in this category which are mirror optical units, the 800mm is a glass system, and therefore - unlike mirror lenses - can be stopped down in the normal way with an iris diaphragm with no lost aperture angle or abnormal reproduction of unsharp image areas.

To appreciate this achievement it must be realized that lens systems of extremely long focal length are very difficult to develop. Residual color aberrations become more prominent with increasing focal length and the most modern way of correcting them is to use crystalline optical media. The drawbacks of such crystals is that they are chemically unstable and very sensitive to damage; in particular, their relatively high coefficient of thermal expansion makes them less suitable for large lenses.

The Ernst Leitz Glass Laboratory in Wetzlar carried on extensive research to produce various glasses of extreme optical characteristics. One result is a special glass closely resembling certain crystalline materials, but without their unfavorable properties. This special glass is mechanically and thermally stable and easy to work. With it, we designed a 3-element, 800mm lens of completely new image performance standard.

For the technically interested: A greatly reduced secondary spectrum not only gives this lens virtually apochromatic correction (negligible focus deviation in all three main bands of the spectrum), but, in fact, an overall optical performance even superior to normal apochromats. Residual aberrations and unsharpness were reduced to less than one-third of the values which are accepted with normal glasses. The result is improved contrast, detail resolution and color differentiation.

The new 800mm LEITZ prototype f/6.3 consists of 3 cemented lenses, with only 2 glass/air surfaces (coated, of course). As the lenses are relatively thin, light transmission of the system is exceptionally high. This, plus the reduced effect of light scatter, is particularly important when photographing very distant subjects where the image contrast is already reduced by atmospheric effects. The lens construction also uses far less glass than multi-lens systems. This concentration of high image illumination means shorter exposure times than for complex tele lenses with the same nominal aperture.

The 800mm is, of course, not just an experiment, but a development to fill a practical need. It is a special lens for the specialist photographer. With its 16-fold magnification (compared with the standard 50mm lens), it spans extreme distances to bring in picture subjects really close. At the same time, it compresses the image perspective of subjects at different distances - the typical telephoto effect which experienced photographers deliberately use for creative work.

Manufacturer description #2

The LEITZ 800mm TELYT-S f/6.3 is another superlatively color-corrected system based on our recently developed glasses with "anomalous partial dispersion", and provides performance superior to that of many apochromatic objectives. The lens consists of three elements cemented together to provide only two-air-glass interfaces, thus greatly reducing the problem of internal reflection and yielding long-range images of the highest contrast. Its optical quality is unexcelled in this focal length.

From the editor

The lens was announced at Photokina 1970 as Leitz Telecron with Leica R mount, issued for the 1972 Olympic Games and made generally available (to special order only) in 1973.

This lens was made possible by new types of glass by which the three-element symmetrical single component design yields high contrast, resolution and color differentiation with residual aberrations reduced to a minimum.

The barrel disassembles into five parts, that lock together with bayonet couplings. Central section of the lens is equipped with huge aluminum handle for transportation. The tube which attaches to the camera carries the preset diaphragm and a filter slot for Series 7 filters.

Focusing is by rack-and-pinion with a control wheel.

Two tripod sockets are provided, one at the point of balance and one at the front to provide extra stability.

The carrying handle incorporates a gunsight type aiming device for rapid alignment on the subject, which would be difficult on the focusing screen with an angle of view of only 3 degrees.

The lens was supplied in a fitted aluminium case.

Typical application

distant subjects, distant landscapes with perspective compression effect, wild nature

Notes and recommendations

  • Use of a tripod is needed due to heavy weight of the lens.

Lenses with similar focal length and speed

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35mm full frame

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

Travellers' choice

Note

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

Professional lens

One of the best slow super telephoto primes

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Unique Leica Look

Leica lenses are one-of-a-kind optical masterpieces that are impressive because of their unique Leica Look. This is ensured through exceptional optical design combined with selected materials and the highest quality standards.

Leica lenses reveal their full potential only when mounted on Leica cameras, since only these have sensors precisely matched to their optical characteristics.

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.

MF

Sorry, no additional information is available.

14162

Replacement rear cover for Leica R-mount lenses except 21mm.

Drop-in filter holder

A drop-in filter holder with a neutral filter comes with the lens. The holder accepts Series VII filters. The filter holder must be always in place because the filter is a part of the lens optical system.

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.

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.