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Tamron 20mm Di III OSD Lens Owner Manual

Tamron 20mm Di III OSD Lens FEATURE

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Tamron 20mm Di III OSD Lens

Tamron 20mm Di III OSD Lens PRODUCT

About Tamron

Tamron is a Japanese company that specializes in the design and manufacture of photographic lenses, optical components, and various other optical products. Founded in 1950, Tamron has a long history of producing high-quality lenses for a wide range of cameras, including DSLRs, mirrorless cameras, and other imaging devices. The company is known for its innovative lens designs and its commitment to providing affordable yet excellent optical products.

PART NAMES (Refer to Fig. 1)

  1. Lens hood
  2. Hood attaching alignment mark
  3. Hood locking mark
  4. Filter ring
  5. Hood release mark
  6. Focus ring
  7. Lens attachment mark
  8. Lens-camera interface contacts

MAIN SPECIFICATIONS Tamron-20mm-Di-III-OSD-Lens-Owner-Manual-2


  • Length: From lens front to mount surface.
  • Features and appearances of lenses listed in this owner’s manual are subject to change without notice.


Remove the rear cap of the lens. Align the lens attachment mark ⑦ and mounting mark on the camera, and then insert the lens.

Turn the lens clockwise until it locks.

To remove the lens, turn the lens in the opposite direction while pressing the lens release button on the camera.

Caution: Turn off the power of the camera before attaching or removing the lens.

Note: For details, please read the instruction manual of your camera.


Select the desired focus mode on the camera.

For manual focusing, turn the focus ring ⑥ to acquire the desired focus. For details, please read the instruction manual of your camera.

Caution: Under AF mode, there may be difficulty for autofocus to work depending on the subject.

LENS HOOD (Ref. Figs. 1, 3 – 7)

A bayonet-type lens hood ① is provided as standard equipment.

We recommend shooting with the hood properly attached because the lens hood eliminates stray light that may affect the picture.

  • Using the lens hood (Ref. Figs. 3, 4 – Model F050/F051, Ref. Fig. 6 – Model F053) Align the hood attaching the alignment mark ② of the hood to with the hood release mark ⑤ of the lens.
    Rotate the hood ① in the direction of the arrow until the hood locking mark ③ meets the hood release mark ⑤.
  • Stowing the lens hood
    • Model F050/F051: You can stow the lens hood ① by attaching it in reverse. Align the hood locking mark ③ of the hood with the hood release mark ⑤ of the lens. Rotate the hood ① in the direction of the arrow until the hood attaching alignment mark ② meets the hood release mark ⑤. (Ref. Fig. 5)
    • Model F053:  The lens hood ① of model F053 cannot be stowed by attaching it in reverse. (Ref. Fig. 7) It has to be stored separately when you are not using it.


  • Be aware that the perimeter of the photographed image may be darkened if the hood ① is not attached properly.
  • When using the lens hood ① with the model F053, attach the front cap and the filter to the lens hood ①. Only for the model F053 the front cap and the filter can be attached to the lens hood ①.
  • When using the flash, remove the lens hood and stand as far as possible from the subject. Depending on the lens and flash used, the lens may block the light from the flash and darken the bottom of the screen.
  • Differences in the display systems of cameras may result in the display of values different from the maximum and minimum aperture values in the specifications. This is not an indication of an error.
  • For information on the compatibility of the product with cameras, see our website. https://www.tamron.jp/en/support/


  • Remove dust and soiling on the lens by using a blower or soft brush. Do not touch the lens with your fingers.
  • The lens surface of the front element has been coated to prevent water and oily substances from adhering. Since it will repel water, do not use lens cleaners or other substances but only a dry cloth to clean the front element.
  • To clean the lens surface of the rear element, lightly wipe it starting from the center with a commercially available lens cleaning paper, a clean cotton cloth, or a microfiber cloth (cleaning cloth for glasses, etc.) soaked in lens cleaner. Do not use a silicone cloth.
  • Clean the lens barrel using a silicone cloth. Never use benzene, thinner, or other organic solvents.
  • Mildew is a major problem for lenses. Store your lens in a clean, cool, and dry place. When you store the lens in a lens case, store it with a commercially available drying agent and replace the drying agent occasionally.
  • Do not touch the lens-camera interface contacts. If dust or stains cause contact problems, signals are not transmitted properly between the lens and camera, and malfunctions may occur.
  • If the temperature changes suddenly, moisture may form within the camera and lens and cause malfunctions. To prevent this, seal your equipment in a plastic bag or similar container. After your equipment has adjusted to the ambient temperature, remove it from the bag and use it as usual.

Precautions for Safe Use of Tamron Lenses

For safe operation be sure to carefully read the “Precautions for Safe Use of Tamron Lenses” and the manual before using the product.

After reading them, store them in a place where they can easily be reviewed whenever needed. Caution instructions are divided into the following two categories according to the degree of danger involved.


  • Do not view the sun or other strong light source directly through the lens or through a camera while using this lens.
    Doing so could cause loss of vision, damage to the lens and/or the camera, and possibly cause the lens and/or camera to ignite.
  • Do not disassemble, repair, or modify the lens.
    This could damage the lens or camera.
  • Keep the lens out of the reach of small children.
    There is a risk of injury if the lens is dropped or falls down.


  • Do not place the lens in direct sunlight or leave it in an extremely hot place such as inside a car. Doing such could damage the internal parts of the lens or cause a fire.
  • Always attach the lens cap whenever the lens is not in use.
  • When attaching the lens to the camera, ensure that the lens has been properly attached to the camera and firmly locked.
    If the lens is not attached properly, it could be difficult to remove or it could fall off causing damage or injury.
  • Do not use this lens for any application other than photography.
  • Do not transport the lens while it is still attached to a tripod.

FAQS About Tamron 20mm Di III OSD Lens

What is the weight of the Tamron 20mm F 2.8 Di III OSD?

7.8 oz

What is the Tamron 20mm’s minimum focus distance?


What is the purpose of a 20mm lens?

If you enjoy seeing new places and taking images of expansive vistas or urban scenes

Is a 20mm focal length suitable?

Excellent performance is shown by the 20mm and 24mm lenses, especially when taking wide-angle pictures.

How far can the attention be focused?

All normal lenses can focus at a maximum distance of infinity.

How close is the minimum focus usually?

25 cm.

Is 20mm a good focal length for portraiture?

Because they can be less than flattering to the person, most portrait photographers might not utilize a 20mm wide-angle lens as their first or first option for headshots.

Is 20 mm sufficient for a landscape?

24mm and/or 20mm lenses are the conventionally favored prime (as opposed to zoom) full-frame focal lengths for landscape lenses.

A 20mm lens is what kind of lens?

A 20mm lens on a full-frame camera is regarded as wide-angle.

20mm has what magnification?


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