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

Introduksjon

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.

Figur 1: Foran view of the Rokinon FE75MFT-B Fisheye Lens (Black).

Produkt overview

Nøkkelfunksjoner

• 180-Degree Angle of View: Captures an expansive field of vision, characteristic of fisheye lenses.
• Optisk konstruksjon: Features 9 elements in 7 groups for optimized image quality.
• Blenderåpning: Adjustable from F3.5 to F22 for versatile lighting conditions.
• Minimum fokuseringsavstand: Achieves close-up shots at 3.5 inches (0.09m).
• Kompakt design: Approximately 1.9 inches long, making it highly portable.
• Ultra Multi-Coating (UMC): Reduces flare and ghosting for improved contrast and color fidelity.
• 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.

Spesifikasjoner

Oppsett

Feste objektivet

1. Sørg for at kameraet er slått av.
2. Juster den røde prikken på objektivhuset med den tilsvarende røde prikken på kameraets objektivfatning.
3. Gently insert the lens into the camera mount.
4. Rotate the lens clockwise until it clicks securely into place.
5. Fjern frontlinsedekselet.

Figur 3: Side view of the Rokinon 7.5mm Fisheye Lens, showing the lens mount.

Fjerning av linsen

1. Sørg for at kameraet er slått av.
2. Fest de fremre og bakre linsedekselene for å beskytte linseelementene.
3. Trykk og hold inne utløserknappen for objektivet på kamerahuset.
4. Roter objektivet mot klokken til det løsner fra kamerafestet.
5. Store the lens in its protective pouch.

Bruk av linsen

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.

Manuell fokus

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.

Figur 4: Vinklet view of the lens, showing the manual focus and aperture rings.

Blenderåpningskontroll

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.

Innebygd linsehette

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.

Figur 5: Foran view of the lens, highlighting the built-in petal-type lens hood.

Kompatible kameraer

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.

Vedlikehold

Rengjøring av linsen

• Use a soft, lint-free microfiber cloth specifically designed for optical surfaces.
• For gjenstridige flekker, bruk en liten mengde linserengjøringsvæske på kluten, ikke direkte på linsen.
• Use a blower brush to remove dust and loose particles before wiping.
• Unngå å berøre glasselementene med fingrene.

Lagring

• Always attach both front and rear lens caps when not in use.
• Oppbevar linsen på et tørt og kjølig sted, unna direkte sollys og ekstreme temperaturer.
• Hvis du oppbevarer over lengre tid, bør du vurdere å bruke et avfuktingsmiddel for å forhindre muggvekst.

Feilsøking

Vanlige problemer og løsninger

• 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.
• Bildene ser uskarpe ut: Verify that the focus ring is correctly adjusted for your subject distance. For wide-angle shots, try setting the focus to infinity (∞).
• Støv på bilder: 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.

Garanti og støtte

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 webnettstedet eller kontakt kundeserviceavdelingen deres. Kontaktinformasjonen finner du vanligvis på produktemballasjen eller i produsentens webnettstedet.

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