Rokinon 135mm F2.0 ED UMC Telephoto Lens for Canon EF - Instruction Manual

1. పరిచయం మరియు ఓవర్view

The Rokinon 135mm F2.0 ED UMC Telephoto Lens is a manual focus prime lens engineered for exceptional image quality. It is designed for use with Canon EF mount cameras, compatible with both full-frame and APS-C sensors. This lens is particularly well-suited for portraiture, landscape, and astrophotography, especially in low-light conditions, thanks to its fast f/2.0 aperture. Its advanced optical design incorporates an Extra-low Dispersion (ED) element and Ultra Multi-Coating (UMC) to minimize aberrations, flare, and ghosting, ensuring clear, high-contrast images.

Figure 1: Rokinon 135mm F2.0 ED UMC Telephoto Lens.

2. పెట్టెలో ఏముంది

Upon opening your Rokinon 135mm F2.0 ED UMC Telephoto Lens package, you should find the following items:

• Rokinon 135mm F2.0 ED UMC Telephoto Lens
• Removable Lens Hood
• ఫ్రంట్ లెన్స్ క్యాప్
• వెనుక లెన్స్ క్యాప్
• క్యారీయింగ్ పర్సు
• వినియోగదారు మాన్యువల్ (ఈ పత్రం)

3 కీ ఫీచర్లు

• ఫోకల్ లెంగ్త్: 135mm telephoto prime lens.
• ఎపర్చరు: Fast f/2.0 maximum aperture for excellent low-light performance and shallow depth of field.
• ఆప్టికల్ డిజైన్: Features one Extra-low Dispersion (ED) element to reduce chromatic aberrations and Ultra Multi-Coating (UMC) to minimize flare and ghosting.
• మాన్యువల్ ఫోకస్: Smooth, well-damped manual focus ring for precise control.
• డయాఫ్రాగమ్ బ్లేడ్లు: 9 rounded diaphragm blades contribute to a pleasing bokeh quality.
• అనుకూలత: Full-frame compatible, also suitable for APS-C cameras (18.8° angle of view on full-frame, 12.4° on APS-C).
• కనిష్ట ఫోకస్ దూరం: 2.6 అడుగులు (0.8 మీటర్లు).
• లెన్స్ హుడ్: Includes a removable lens hood to reduce lens flare and provide protection.

4. సెటప్ మరియు ఇన్‌స్టాలేషన్

4.1 మీ కెమెరాకు లెన్స్‌ను అటాచ్ చేయడం

1. మీ కెమెరా పవర్ ఆఫ్ చేయబడిందని నిర్ధారించుకోండి.
2. Remove the rear lens cap from the Rokinon 135mm lens and the body cap from your Canon EF mount camera.
3. లెన్స్ బారెల్ పై ఉన్న ఎరుపు చుక్కను మీ కెమెరా లెన్స్ మౌంట్ పై ఉన్న ఎరుపు చుక్కతో సమలేఖనం చేయండి.
4. Insert the lens into the camera mount and rotate it clockwise until it clicks securely into place.

4.2 లెన్స్ హుడ్‌ను అటాచ్ చేయడం

The included lens hood helps to block stray light from entering the lens, reducing flare and ghosting. It also provides additional physical protection for the front element.

1. Align the white dot on the lens hood with the white dot on the front of the lens barrel.
2. Gently push the hood onto the lens and rotate it clockwise until it locks into position.
3. To remove, press the release button on the side of the hood (if present) and rotate counter-clockwise.

Figure 2: Lens with removable hood attached.

5. ఆపరేటింగ్ సూచనలు

5.1 మాన్యువల్ ఫోకస్

This is a manual focus lens. To achieve sharp focus, rotate the large, ribbed focus ring on the lens barrel until your subject appears sharp in the viewfinder or on your camera's LCD screen. Many modern cameras offer focus peaking or magnification features to assist with precise manual focusing.

5.2 ఎపర్చరు నియంత్రణ

The aperture is controlled directly on the lens via the aperture ring. Rotate the smaller, click-stopped ring to select your desired f-stop, ranging from f/2.0 (wide open) to f/22 (most closed). A wider aperture (smaller f-number) allows more light in and creates a shallower depth of field, ideal for isolating subjects. A narrower aperture (larger f-number) allows less light in and creates a greater depth of field, suitable for landscapes.

మూర్తి 3: వివరంగా view of the lens's focus and aperture rings.

6. నిర్వహణ మరియు సంరక్షణ

Proper care and maintenance will ensure the longevity and optimal performance of your Rokinon lens.

• శుభ్రపరచడం: Use a soft, lint-free cloth and a specialized lens cleaning solution to clean the glass elements. Avoid touching the glass with your fingers. Use a blower brush to remove dust before wiping.
• నిల్వ: Store the lens in a cool, dry place away from direct sunlight and extreme temperatures. Use the provided lens caps and carrying pouch for protection.
• నిర్వహణ: Always handle the lens by its barrel, not by the focus or aperture rings, to avoid accidental adjustments or damage.
• తేమ: Avoid exposing the lens to moisture or rain. This lens is not weather-sealed.

7. ట్రబుల్షూటింగ్

As a manual lens, most operational issues relate to user technique. Here are some common points to consider:

• అస్పష్టమైన చిత్రాలు: Ensure accurate manual focus. Utilize your camera's focus peaking or magnification features. Check your shutter speed to avoid camera shake, especially with a telephoto lens.
• Dark Corners (Vignetting): This is a common optical characteristic, especially at wider apertures (e.g., f/2.0). It can often be corrected in post-processing software.
• Color Fringing/Chromatic Aberration: While the ED element helps reduce this, some may still occur in high-contrast areas. This can also be corrected in post-processing.
• Lens Not Attaching: Ensure correct alignment of the red dots on the lens and camera body. Do not force the lens.

8. స్పెసిఫికేషన్లు

9. వారంటీ మరియు మద్దతు

For warranty information, technical support, or service inquiries, please refer to the official Rokinon webసైట్ లేదా వారి కస్టమర్ సర్వీస్‌ను నేరుగా సంప్రదించండి. వారంటీ క్లెయిమ్‌ల కోసం మీ కొనుగోలు రుజువును ఉంచండి.

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