1. المقدمة
شكرا لك على الشراءasing 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.
تتضمن الميزات الرئيسية ما يلي:
- F1.7 Large Aperture: يُتيح أداءً ممتازًا في الإضاءة المنخفضة وتأثير ضبابية خلفية جميل (بوكيه).
- التصميم البصري: Features 9 blades in 8 groups, including 2 ED ultra-low dispersion lenses, for high image quality.
- أوضاع التركيز: 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.
- التركيز الوثيق: Minimum focusing distance of approximately 0.30m with a maximum magnification of about 0.15 times.
2. ماذا يوجد في الصندوق
يرجى التحقق من محتويات الحزمة الخاصة بك للتأكد من وجود جميع العناصر:
- 1 x YONGNUO YN42.5MM F1.7M II Lens
- 1 x Lens Front Cover
- 1 x Lens Rear Cover
- 1 × دليل التعليمات (هذه الوثيقة)

Image: The YONGNUO YN42.5MM F1.7M II lens, its packaging, front and rear lens caps, and the instruction manual.
3. الإعداد والتثبيت
3.1 تركيب العدسة على الكاميرا
- Ensure your camera is powered off before attaching or detaching any lens.
- 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.
- Align the white mounting index mark on the lens with the corresponding mark on your camera's lens mount.
- أدخل العدسة في حامل الكاميرا وقم بتدويرها باتجاه عقارب الساعة حتى تستقر في مكانها. لا تجبر العدسة على الدخول.
- Remove the front lens cap. Your lens is now ready for use.

الصورة: الخلفية view of the lens showing the Micro Four Thirds mount and electronic contacts. Ensure these contacts are clean before mounting.
3.2 فصل العدسة
- Power off your camera.
- اضغط مع الاستمرار على زر تحرير العدسة الموجود على جسم الكاميرا.
- قم بتدوير العدسة عكس اتجاه عقارب الساعة حتى تنفصل عن جسم الكاميرا.
- Immediately attach the rear lens cap to the lens and the body cap to the camera to protect them from dust and damage.
4. تعليمات التشغيل
4.1 مفتاح وضع التركيز (AF/MF)
The YN42.5MM F1.7M II lens features a switch to select between Auto Focus (AF) and Manual Focus (MF) modes.
- التركيز التلقائي (AF): In this mode, the camera will automatically focus on your subject. This is suitable for most general photography.
- MF (التركيز اليدوي): 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.

الصورة: الجانب view of the lens highlighting the AF/MF switch for selecting focus mode.
4.2 التحكم في الفتحة
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.

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.

Image: The lens barrel displaying the minimum focusing distance of 0.3m/1.0ft and 0.15x magnification.
4.4 الكاميرات المتوافقة
This lens is designed for Micro Four Thirds (M4/3) system cameras. Compatible models include, but are not limited to:
- أوليمبوس: E-M5 Mark II, E-M10 Mark III, E-M10 IV, E-PL9, E-PL10, PEN-F
- باناسونيك: G100, GH5, G9, G95, G85, GX9, GX85, GF-10, GF-9, GF-8
5. الصيانة والعناية
- تنظيف العدسة: 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.
- تخزين: 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.
- تجنب التأثير: احمِ العدسة من السقوط والصدمات، التي يمكن أن تتلف المكونات الداخلية أو المحاذاة البصرية.
- الماء والغبار: This lens is not water-resistant. Avoid exposure to rain, splashes, or excessive dust.
6. استكشاف الأخطاء وإصلاحها
| مشكلة | السبب المحتمل | حل |
|---|---|---|
| لم يتم التعرف على العدسة بواسطة الكاميرا | العدسة غير مثبتة بشكل صحيح؛ نقاط التلامس الإلكترونية متسخة. | 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 inaccurate | Low 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. |
| الصور غير واضحة | Incorrect 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 aperture | Camera 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. المواصفات
| ميزة | التفاصيل |
|---|---|
| ماركة | YONGNUO |
| اسم الموديل | YN42.5mm F1.7M II |
| البعد البؤري | 42.5 مم (ثابت) |
| الفتحة القصوى | ف1.7 |
| الفتحة الدنيا | F22 (typical for prime lenses) |
| حامل العدسة | Micro Four Thirds (M4/3) |
| نوع العدسة | عدسة أساسية قياسية |
| التصميم البصري | 9 عنصرًا في 8 مجموعة (بما في ذلك عدستين منخفضتي التشتت للغاية) |
| شفرات الحجاب الحاجز | 7 شفرات |
| نوع التركيز | Auto Focus (STM Stepper Motor) / Manual Focus |
| الحد الأدنى لمسافة التركيز | 0.30م (1.0 قدم) |
| الحد الأقصى للتكبير | 0.15x |
| حجم الفلتر | 52 ملم |
| تثبيت الصورة | No (relies on camera body IS if available) |
| لون | أسود |
ملاحظة: المواصفات عرضة للتغيير دون إشعار.
8. الضمان والدعم
This YONGNUO YN42.5MM F1.7M II lens comes with a ضمان لمدة 1 سنوات 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 webموقع: www.yongnuo.com.cn
9. فيديو المنتج
Video: An official YONGNUO video showcasing the YN42.5mm F1.7M II Prime Lens, highlighting its design and features.