YONGNUO YN42.5mm F1.7M II

YONGNUO YN42.5MM F1.7M II Lens Instruction Manual

Model: YN42.5mm F1.7M II

1. Inleiding

Dankie vir die aankoopasing the YONGNUO YN42.5MM F1.7M II Medium Auto Focus Fixed Prime Lens. This lens is designed for Micro Four Thirds (M4/3) cameras, offering a versatile 42.5mm focal length and a bright F1.7 large aperture. It is compatible with various Olympus and Panasonic camera models. This manual provides essential information for safe and effective operation.

Sleutel kenmerke sluit in:

  • F1.7 Groot Diafragma: Enables excellent low-light performance and beautiful background blur (bokeh).
  • Optiese ontwerp: Features 9 blades in 8 groups, including 2 ED ultra-low dispersion lenses, for high image quality.
  • Focus Modes: Supports both Auto Focus (AF) and full-time Manual Focus (MF) for flexible control.
  • STM Stepper Motor: Equipped with a high-speed and high-precision STM stepper motor for fast, quiet, and accurate focusing.
  • Close Focusing: Minimum focusing distance of approximately 0.30m with a maximum magnification of about 0.15 times.

2. Wat is in die boks

Kontroleer asseblief die inhoud van u pakket om seker te maak dat alle items teenwoordig is:

  • 1 x YONGNUO YN42.5MM F1.7M II Lens
  • 1 x Lens Front Cover
  • 1 x Lens Rear Cover
  • 1 x Instruksiehandleiding (hierdie dokument)
YONGNUO YN42.5MM F1.7M II Lens and accessories

Image: The YONGNUO YN42.5MM F1.7M II lens, its packaging, front and rear lens caps, and the instruction manual.

3. Opstelling en installering

3.1 Die lens aan jou kamera bevestig

  1. Ensure your camera is powered off before attaching or detaching any lens.
  2. Remove the rear lens cap from the YN42.5MM F1.7M II lens and the body cap from your camera. Avoid touching the lens elements or the camera's sensor.
  3. Align the white mounting index mark on the lens with the corresponding mark on your camera's lens mount.
  4. Plaas die lens in die kameramontering en draai dit kloksgewys totdat dit in plek klik. Moenie die lens forseer nie.
  5. Verwyder die voorste lensdop. Jou lens is nou gereed vir gebruik.
Agter view of YONGNUO YN42.5MM F1.7M II lens mount

Beeld: Agter view of the lens showing the Micro Four Thirds mount and electronic contacts. Ensure these contacts are clean before mounting.

3.2 Die lens losmaak

  1. Power off your camera.
  2. Druk en hou die lensvrystellingsknoppie op jou kameraliggaam in.
  3. Draai die lens antikloksgewys totdat dit van die kamera se liggaam loskom.
  4. Immediately attach the rear lens cap to the lens and the body cap to the camera to protect them from dust and damage.

4. Bedryfsinstruksies

4.1 Focus Mode Switch (AF/MF)

The YN42.5MM F1.7M II lens features a switch to select between Auto Focus (AF) and Manual Focus (MF) modes.

  • AF (Auto Focus): In this mode, the camera will automatically focus on your subject. This is suitable for most general photography.
  • MF (Handmatige Fokus): In this mode, you manually adjust the focus ring on the lens to achieve focus. This is useful for precise focusing in specific situations or when auto-focus struggles.
Kant view of YONGNUO YN42.5MM F1.7M II lens showing AF/MF switch

Beeld: Sykant view of the lens highlighting the AF/MF switch for selecting focus mode.

4.2 Diafragmabeheer

The lens has a maximum aperture of F1.7. Aperture control is managed through your camera body. Refer to your camera's instruction manual for details on adjusting aperture settings. A wider aperture (smaller f-number like F1.7) allows more light in and creates a shallower depth of field, blurring the background.

YONGNUO YN42.5MM F1.7M II lens on a camera, demonstrating background blur

Image: The YN42.5MM F1.7M II lens mounted on a camera, illustrating the effect of a large F1.7 aperture on background blur.

4.3 Minimum Focusing Distance

This lens can focus as close as 0.30 meters (approximately 1 foot), allowing for detailed close-up shots with a maximum magnification of 0.15 times.

YONGNUO YN42.5MM F1.7M II lens showing minimum focusing distance markings

Image: The lens barrel displaying the minimum focusing distance of 0.3m/1.0ft and 0.15x magnification.

4.4 Compatible Cameras

This lens is designed for Micro Four Thirds (M4/3) system cameras. Compatible models include, but are not limited to:

  • Olympus: E-M5 Mark II, E-M10 Mark III, E-M10 IV, E-PL9, E-PL10, PEN-F
  • panasonic: G100, GH5, G9, G95, G85, GX9, GX85, GF-10, GF-9, GF-8

5. Onderhoud en versorging

  • Maak die lens skoon: Use a soft, lint-free cloth or a lens brush to remove dust. For smudges or fingerprints, use a specialized lens cleaning solution and a microfiber cloth. Apply solution to the cloth, not directly to the lens.
  • Berging: When not in use, always attach the front and rear lens caps. Store the lens in a dry, cool place, away from direct sunlight and extreme temperatures. Consider using a dehumidifying cabinet if you live in a humid environment.
  • Vermy impak: Protect the lens from drops and impacts, which can damage internal components or optical alignment.
  • Water en Stof: This lens is not water-resistant. Avoid exposure to rain, splashes, or excessive dust.

6. Probleemoplossing

ProbleemMoontlike oorsaakOplossing
Lens word nie deur kamera herken nieLens not properly mounted; dirty electronic contacts.Re-attach the lens, ensuring it clicks into place. Clean the electronic contacts on both the lens and camera with a clean, dry cloth.
Auto Focus is slow or inaccurateLow light conditions; subject lacks contrast; AF/MF switch in MF position.Ensure adequate lighting. Switch to MF mode for precise manual focusing. Check if the AF/MF switch is set to AF.
Beelde is vaagIncorrect focus; camera shake; dirty lens element.Verify focus. Use a faster shutter speed or tripod to prevent camera shake. Clean the front and rear lens elements.
Cannot change apertureCamera settings issue; lens not communicating with camera.Ensure the lens is correctly mounted. Check your camera's shooting mode (e.g., not in a fully automatic mode that overrides aperture control).

7. Spesifikasies

KenmerkDetail
HandelsmerkYONGNUO
Model NaamYN42.5mm F1.7M II
Brandpuntsafstand42.5mm (Vas)
Maksimum diafragmaF1.7
Minimum diafragmaF22 (typical for prime lenses)
Lens MountMicro Four Thirds (M4/3)
Lens tipeStandaard Prime Lens
Optiese Ontwerp9 elemente in 8 groepe (insluitend 2 ED-lense)
Diafragma lemme7 lemme
Fokus TipeAuto Focus (STM Stepper Motor) / Manual Focus
Minimum fokusafstand0.30 m (1.0 voet)
Maksimum vergroting0.15x
Filter grootte52 mm
BeeldstabilisasieNo (relies on camera body IS if available)
KleurSwart

Opmerking: Spesifikasies kan sonder kennisgewing verander word.

8. Waarborg en Ondersteuning

This YONGNUO YN42.5MM F1.7M II lens comes with a 1 jaar waarborg from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or improper storage.

For warranty claims or technical support, please contact your retailer or YONGNUO customer service. Keep your proof of purchase for warranty validation.

For the latest support information and contact details, please visit the official YONGNUO webwebwerf: www.yongnuo.com.cn

9. Produkvideo

Video: An official YONGNUO video showcasing the YN42.5mm F1.7M II Prime Lens, highlighting its design and features.

© 2026 YONGNUO. Alle regte voorbehou.

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