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Tamron SP 1.4X Teleconverter 140F

Teleconverter • Film era • Discontinued

Tamron SP 1.4X Teleconverter 140F

Specification

Production details
Announced:<No information>
Production status: Discontinued
Original name:TAMRON SP BBAR MC TELECONVERTER 1.4X 140F
System:-
Optical design
Magnification factor:1.4x
Maximum format:35mm full frame
Mount:Interchangeable mount
Lens construction:5 elements - 3 groups
Physical characteristics
Weight:169g
Maximum diameter x Length:⌀64.5×26.4mm
Weather sealing:-
Fluorine coating:-

*) Sources of data: Tamron lenses. Choose a Tamron high-performance lens for your SLR camera booklet ● Tamron lens catalogue. Adaptall-2 interchangeable mount system lenses ● Tamron SP Series LD lenses booklet.

Manufacturer description #1

Designed Specifically for Use with Long Focal-Length Tamron Tele-Zoom and Telephoto Lenses and to Maintain Maximum Performance and Image Quality

This SP 1.4X tele-converter consists of a 5-element, 3-group optical system in a totally new Tamron Adaptall-2 tele-converter design to maximize results when used with specific lenses.

Key features:

Superb Performance

The sophisticated optical design of this 1.4X tele-converter corrects various aberrations normally arising with ordinary tele-converters and multipliers... assuring outstanding quality photo results.

Specific Lens Compatibility

This 1.4X tele-converter is supplied as a standard accessory with the new Tamron SP 300mm f/2.8 LD IF lens. It is also compatible with all Tamron fixed focal length lenses of 90mm or greater - plus the new SP200-500mm f/5.6 zoom lens.

Only a One-Stop Exposure Increase

The SP 1.4X tele-converter keeps the high speed of the original lens and adds additional telephoto capacity as often desired by the professional. Doubling is not always an advantage. The one stop exposure increase, for example, means the Tamron SP 300mm f/2.8 becomes a 420mm f/4 fast ultra-telephoto.

Compact and Lightweight

This tele-converter is remarkably compact, measuring just 21.9mm (0.86 inches) and weighing just 169 grams (5.96 oz.) while increasing the focal length and magnification ratio of the original lens by 1.4X.

Manufacturer description #2

This tele-converter uses a 5-element 3-group optical system with elements made from high-refractive glass. The design consists of cemented front and rear groups and corrects various aberrations normally arising with ordinary tele-converters and multipliers. Thus excellent quality is assured. This teleconverter is supplied as a standard accessory with the new Tamron SP300mm F/2.8 LD. I.F. lens. It is also compatible with all Tamron fixed focal length lenses of 90mm or greater and the new SP200-500 F/5.6 zoom lens. The tele-converter is remarkable compact, measuring a mere 21.9mm (0.86 in) and weighing just 169 grams (6.0 oz), yet increases the magnification of Tamron lenses by 1.4X. Only a one-stop exposure increase is required. When you combine it with the Tamron SP300mm F/2.8, for example, you have a 420mm F/4 fast ultra-telephoto.

From the editor

The 140F converter was designed to be used with Tamron's SP 90mm models 52B and 52BB, SP 300mm F/2.8, SP 400mm F/4, SP 200-500 F/5.6, and the SP 350mm F/5.6 and SP 500mm F/8 mirror lenses. Tamron's literature states that this converter is compatible with all Tamron fixed focal length lenses of 90mm and longer. This converter also performs well with all Tamron zoom lenses which have a stationary master group (the rearmost group of lens elements), and can also be used with many Tamron wide to tele zoom lenses for increasing maximum macro magnification by 1.4X. The optical design uses high dispersion glass and features a doublet combined with an air spaced double concave lens (thus forming a strong air spaced triplet) for creating the magnification effect. The rearmost doublet decreases the magnification effect and serves to flatten the field and to correct off-axis aberrations.

Weight and dimensions are indicated for the Nikon F mount.

Compatible lenses (14)

2.8 Tamron SP 80-200mm F/2.8 30A [Adaptall-2] ⌀77Push/pull 1985 
2.8 Tamron SP 90mm F/2.8 Macro 72B [Adaptall-2] ⌀551:1 @ CFD 0.29mPro 1996 
2.5 Tamron SP 90mm F/2.5 Macro 52B [Adaptall-2] ⌀491:2 @ CFD 0.39mPro 1979 
2.5 Tamron SP 90mm F/2.5 Macro 52BB [Adaptall-2] ⌀551:2 @ CFD 0.39mPro 1984 
2.5 Tamron SP 180mm F/2.5 LD [IF] 63B “35th Anniversary” [Adaptall-2] ⌀77 1988 
5.6 Tamron SP 200-500mm F/5.6 31A [Adaptall-2] ⌀95 1984 
5.6 Tamron SP 300mm F/5.6 54B [Adaptall-2] ⌀58Pro 1979 
2.8 Tamron SP 300mm F/2.8 LD 107B [Adaptall-2] ⌀112Pro 1983 
2.8 Tamron SP 300mm F/2.8 LD [IF] 60B [Adaptall-2] ⌀112Pro 1984 
2.8 Tamron SP 300mm F/2.8 LD [IF] 360B [Adaptall-2] ⌀112Pro 1993 
5.6 Tamron SP 350mm F/5.6 06B [Adaptall-2] ⌀82 1981 
4.0 Tamron SP 400mm F/4 LD [IF] 65B [Adaptall-2] ⌀112Pro 1988 
8 Tamron SP 500mm F/8 55B [Adaptall-2] ⌀82 1979 
8 Tamron SP 500mm F/8 55BB [Adaptall-2] ⌀82 1983 

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35mm full frame

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

Pancake lens

Pancake lenses get their name due to the thin and flat size. The other distinctive features are fixed focal length and light weight.

First pancake lenses appeared in the 1950s and were standard prime lenses based on the famous Tessar design – a brilliantly simple design which was developed by Paul Rudolph in 1902, patented by Zeiss company and provided a good optical performance.

With the improvement of optical technologies in the 1970s the optical design of pancake lenses became more complicated and the latest generation has overcome the limitations of traditional designs. As a result, pancake lenses are now also available in wide-angle and even short telephoto variations.

Due to the increasing demand for cameras with a compact form factor, pancake lenses are experiencing a second wave of popularity while having reasonable prices, which makes them accessible to a wide range of photographers. Such lenses are especially useful for those who enjoy travel photography.

Travellers' choice

Note

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

One of the best

According to lens-db.com; among lenses designed for the same maximum format and mount.

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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.

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.