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Rokinon IO50AF-E AF 50mm Auto Focus Lens for Sony Instuction Manual

Rokinon IO50AF-E AF 50mm Auto Focus Lens for Sony FEATURE

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Rokinon IO50AF-E AF 50mm Auto Focus Lens for Sony

Rokinon IO50AF-E AF 50mm Auto Focus Lens for Sony PRODUCT

About Rokinon

Rokinon is a brand known for manufacturing camera lenses and other optical equipment. It is part of the Samyang Optics Company, a South Korean optical equipment manufacturer. Rokinon lenses are often praised for their affordability and good optical quality, making them popular among photographers and videographers, especially those on a budget.


  • It will provide optimal quality still images and video with Sony Full Frame and APS-C image sensor cameras.
  • Equipped with a large F1.4 aperture, its performance and image quality competes with the best in its class.
  • Three high-precision aspherical lens elements are utilized to minimize aberrations and increase sharpness.
  • The AF (autofocus) function is optimized for fast and precise focus detection with mirrorless cameras.
  • Its size, shape, and grip have been ergonomic. designed for enhanced stability and comfortable use.
  • The refined all-metal design combines a luxurious look with excellent durability.
  • The IF (Internal Focus) design prevents both changes in length and front element rotation for easy use with polarizing and other filters where positioning must be maintained.


To maintain your safety and prevent damage to the lens, please fully familiarize yourself with the following:

  • Do not look directly at the sun through the lens as It may seriously impair your vision.
  • Do not apply excessive force when attaching the lens to the camera as it may cause damage to the lens or your camera.
  • The lens is a precision optical product, so dropping or excessive impact may cause product failure.
  • Attach or detach the lens only while the camera is turned off.
  • Be careful not to touch or contaminate the gold contacts on the mount as it can adversely affect communication with the camera.
  • Protect the lens from water, high humidity, and excessive heat.
  • Always store the lens with the lens cap on in a dry and well-ventilated location out of direct sunlight. Direct sunlight passing through the lens could become concentrated enough to cause a fire.
  • Avoid subjecting the lens to drastic temperature changes such as moving from a very cold outdoor location to a warm indoor location. This can cause moisture in the air to condense inside or on the outside of the lens and lead to failure or mold production. Before taking the lens indoors from a cold outdoors location, put the lens in a plastic bag or sealed camera bag and remove it only when the lens has warmed up to room temperature.



  • It is extremely important before cleaning to dust off the lens surface using a lens blower or a soft brush to remove any foreign particles or grit that could scratch the lens.
  • Using a clean microfiber lens cloth, gently wipe the lens in a circular motion from the center outwards towards the edges of the glass.
  • If stubborn spots remain, put only one or two small drops of ethanol or reputable lens cleaner on the microfiber cloth and repeat the circular cleaning process. DO NOT USE AN ORGANIC SOLVENT SUCH AS PAINT THINNER, ALCOHOL, OR BENZENE.

Included Components

  • Front lens cap
  • Rear lens cap
  • Lens Hood
  • Soft lens pouch
  • Instruction manual
  • Warranty Card

Attaching the lens

  • Remove the rear lens cap and the camera body cap.
  • Align the white index mark (dot) on the lens barrel with the white index mark (dot) on the lens mount of the camera.
  • Do not press the lens release button on the camera when mounting the lens.
  • Insert the lens into the camera mount and rotate it clockwise until it “clicks” and locks in place. Do not insert the lens at an angle
  • Remove the front lens cap when you are ready to shoot.

Detaching the lens

  • Attach the front lens cap.
  • While holding down the lens release button on the camera body, rotate the lens counterclockwise until it stops and separate the lens from the body.
  • Attach the rear lens cap.



  1. Filter mounting threads
  2. Manual focus ring
  3. Lens mount
  4. Lens mounting index
  5. Contacts
  6. Hood index


Sony mirrorless interchangeable lens cameras offer various methods of focusing. For detailed information regarding the available focus mode settings for your particular model, refer to the instruction manual of your camera.

  • AF-S (Single-Shot AF): Autofocus operates when the shutter button is pressed halfway down. Once the subject is in focus, the focus is locked. It is suitable for shooting motionless subjects such as landscapes or snapshots.
  • AF-C (Continuous AF): Autofocus continues to operate and keeps adjusting the focus while the shutter button is pressed and held halfway down. It is suitable for shooting moving subjects such as sports.
  • AF-A (Automatic AF): When the shutter button is pressed halfway down, the camera automatically recognizes whether the subject is moving or not, and switches the AF mode between AF-S and AF-C accordingly. Use this mode to shoot various subjects at the same time, or to avoid switching the AF mode manually.
  • DMF (Direct Manual Focus): Allows you to use manual focus and autofocus in combination. Press the shutter button halfway down to focus automatically. Keep the shutter button halfway down and rotate the focusing ring on the lens to fine focus.
  • MF (Manual Focus): Allows you instead of the camera to adjust the focus by rotating the focusing ring on the lens. MF is effective when autofocus does not work well such as in macro shooting.

Lens Hood

The supplied petal-shaped hood is designed specifically for the Rokinon AF 50mm F1.4 lens for optimum effectiveness. It should be used at all times to help prevent contrast-reducing flare, provide better contrast, and for added protection.


  • To mount the hood, align the white index mark (dot) of the hood with the white hood index mark (dot) of the lens and rotate the hood clockwise until you hear and feel it click in place.
  • The hood is mounted correctly when the short “petals” are on the left and right and the longer petals on the top and bottom. If the hood is not mounted correctly it might become damaged or create vignetting in which the petals of the hood can be seen or darken the edges of the image.
  • To remove the hood, grasp it firmly near its base and turn counterclockwise
  • You can store the hood in its reverse position for easy transport. Reverse the hood so that it covers the lens barrel and again align the white index mark (dot) of the hood with the white hood index mark (dot) of the lens and rotate the hood clockwise until you hear and feel it click in place.
  • Please note that the lens hood might block the light from small-sized flash units causing a shadow at the bottom of the image.


Product specifications


  • The minimum focus is the distance from the image sensor to the object.
  • The product specifications and exterior are subject to change without notice.


Elite Brands Inc.
Rokinon Division
New York, NY 10005

Toll Free: 800.441.1100
Phone: 212.947.7100


FAQS About Rokinon IO50AF-E AF 50mm Auto Focus Lens for Sony

Is Sony and Rokinon compatible?

complete compatibility with Sony E-mount APS-C cameras

Have Rokinon optics been autofocused?

Rokinon will include imaging-optimized components into autofocus lenses.

What is the Sony 50mm’s minimum focus distance?


What is the weight of a Sony 50mm 1.4 GM?

1.14 lb

Rokinon optics are they sharp?

Very crisp

Are Rokinon lenses image stabilized?

With these lenses, stabilization is not an option.

Does autofocus impact the quality of images?

Speed and the autofocus system are key elements in deciding a photograph’s quality.

What is the ideal shooting distance for a 50mm lens?

at a distance of at least 45 cm from the subject.

What is the focusing distance minimum?

Each lens has a minimum focusing distance at which it may capture an image.

What’s the weight of a Sony 50mm lens?

186 grams

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