Rokinon FE75MFT-B 7.5mm F3.5 UMC Fisheye Lens Instruction Manual

Введение

The Rokinon 7.5mm F3.5 UMC Fisheye Lens is specifically designed for Micro Four Thirds camera systems, offering an ultra-wide 180-degree diagonal angle of view. This compact lens features a robust construction and advanced optical design, engineered to deliver sharp images and accurate color reproduction. Its manual operation provides precise control for various photographic applications.

Рисунок 1: Передняя часть view of the Rokinon FE75MFT-B Fisheye Lens (Black).

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Основные характеристики

• 180-Degree Angle of View: Captures an expansive field of vision, characteristic of fisheye lenses.
• Оптическая конструкция: Features 9 elements in 7 groups for optimized image quality.
• Диапазон диафрагмы: Adjustable from F3.5 to F22 for versatile lighting conditions.
• Минимальное расстояние фокусировки: Achieves close-up shots at 3.5 inches (0.09m).
• Компактный дизайн: Approximately 1.9 inches long, making it highly portable.
• Ultra Multi-Coating (UMC): Уменьшает блики и ореолы, улучшая контрастность и цветопередачу.
• Built-in Lens Hood: Integrated petal-type lens hood helps to minimize stray light.

Figure 2: Visual representation of the Rokinon 7.5mm Fisheye Lens's optical and design features.

Технические характеристики

Настраивать

Прикрепление линзы

1. Убедитесь, что камера выключена.
2. Совместите красную точку на корпусе объектива с соответствующей красной точкой на креплении объектива вашей камеры.
3. Аккуратно вставьте объектив в крепление камеры.
4. Rotate the lens clockwise until it clicks securely into place.
5. Снимите переднюю крышку объектива.

Рисунок 3: Сторона view of the Rokinon 7.5mm Fisheye Lens, showing the lens mount.

Снятие линзы

1. Убедитесь, что камера выключена.
2. Для защиты линз объектива наденьте переднюю и заднюю крышки.
3. Нажмите и удерживайте кнопку фиксации объектива на корпусе вашей камеры.
4. Rotate the lens counter-clockwise until it detaches from the camera mount.
5. Store the lens in its protective pouch.

Управление объективом

This Rokinon lens is a manual focus and manual aperture lens. It does not have electronic contacts to communicate with the camera body. Therefore, all focus and aperture adjustments must be made directly on the lens.

Ручная фокусировка

The focus ring is located on the front part of the lens barrel. Rotate this ring to adjust the focus. For Micro Four Thirds cameras, it is often recommended to set the camera to a 'No Lens' or 'Shoot Without Lens' mode in the camera's menu to enable shooting with manual lenses.

Due to the extremely wide angle of view and inherent deep depth of field of a fisheye lens, precise focusing is often less critical. For many shots, especially landscapes or street photography, setting the focus to infinity (∞) or a hyperfocal distance can keep most of the scene in acceptable focus.

Рисунок 4: Наклонный view of the lens, showing the manual focus and aperture rings.

Управление диафрагмой

The aperture ring is located closer to the camera body. Rotate this ring to select your desired aperture (F3.5 to F22). Wider apertures (smaller f-numbers like F3.5) allow more light and create shallower depth of field, while narrower apertures (larger f-numbers like F22) allow less light and create greater depth of field.

Встроенная бленда объектива

The lens features a permanently attached petal-type lens hood. This hood is designed to block stray light from entering the lens, reducing flare and ghosting, and also provides some physical protection to the front element.

Рисунок 5: Передняя часть view of the lens, highlighting the built-in petal-type lens hood.

Совместимые камеры

This lens is compatible with Micro Four Thirds (MFT) camera systems, including models from Olympus PEN and Panasonic Lumix G series. Ensure your camera is set to allow shooting without a lens attached, as this is a fully manual lens.

Обслуживание

Чистка линз

• Use a soft, lint-free microfiber cloth specifically designed for optical surfaces.
• Для удаления стойких пятен используйте небольшое количество жидкости для чистки линз, нанеся ее на салфетку, а не непосредственно на линзу.
• Use a blower brush to remove dust and loose particles before wiping.
• Избегайте прикосновения к стеклянным элементам пальцами.

Хранилище

• Always attach both front and rear lens caps when not in use.
• Храните линзы в сухом, прохладном месте, вдали от прямых солнечных лучей и экстремальных температур.
• При длительном хранении рассмотрите возможность использования осушителя, чтобы предотвратить появление плесени.

Поиск неисправностей

Распространенные проблемы и решения

• Camera not recognizing lens / Shutter not firing: Ensure your Micro Four Thirds camera is set to 'Shoot Without Lens' or a similar setting in its menu. Consult your camera's manual for specific instructions.
• Изображения выглядят размытыми: Verify that the focus ring is correctly adjusted for your subject distance. For wide-angle shots, try setting the focus to infinity (∞).
• Пыль на изображениях: Clean the lens elements as described in the Maintenance section. If dust persists, it may be on the camera sensor, requiring professional cleaning.
• Vignetting or dark corners: This is a common characteristic of fisheye lenses, especially at wider apertures. It can often be corrected in post-processing software.

Гарантия и поддержка

The Rokinon FE75MFT-B 7.5mm F3.5 UMC Fisheye Lens typically comes with a 1-year limited warranty from the date of purchase. Please retain your proof of purchase for warranty claims.

For technical support, service, or detailed warranty information, please visit the official Rokinon webили обратитесь в службу поддержки клиентов. Контактная информация обычно указана на упаковке продукта или на сайте производителя. webсайт.

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