Viltrox AF 25MM F1.7 APS-C Lens User Manual

1. Úvod

Thank you for choosing the Viltrox AF 25MM F1.7 APS-C Lens. This high-quality autofocus prime lens is designed for APS-C mirrorless cameras, offering a versatile 25mm focal length (approximately 38mm full-frame equivalent) and a bright F1.7 maximum aperture. It is ideal for a wide range of photography, including street, still life, environmental portraits, and general-purpose shooting, delivering excellent image quality with true-to-life color reproduction and sharp focus.

2. Obsah balení

Zkontrolujte prosím, zda jsou v balení přítomny všechny položky:

• Balící krabice
• Viltrox AF 25MM F1.7 APS-C Lens
• Přepravní pouzdro
• Sluneční clona objektivu
• Zadní krytka objektivu
• Přední krytka objektivu
• Uživatelská příručka (tento dokument)
• Záruční list

3. Nastavení

3.1 Nasazení objektivu na fotoaparát

1. Ujistěte se, že je fotoaparát vypnutý.
2. Remove the rear lens cap from the Viltrox AF 25MM F1.7 lens and the body cap from your camera.
3. Align the mounting index (white dot) on the lens with the corresponding index on your camera body.
4. Vložte objektiv do bajonetu fotoaparátu a otáčejte jím ve směru hodinových ručiček, dokud nezacvakne. Netlačte na objektiv silou.

3.2 Odpojení objektivu od fotoaparátu

1. Ujistěte se, že je fotoaparát vypnutý.
2. While pressing the lens release button on your camera body, rotate the lens counter-clockwise until it stops.
3. Gently remove the lens from the camera body.
4. Attach the rear lens cap to the lens and the body cap to your camera to protect them from dust and damage.

3.3 Nasazení sluneční clony objektivu

The included lens hood helps to block stray light, reducing flare and ghosting, and provides some physical protection for the front element of the lens.

1. Zarovnejte značku na sluneční cloně objektivu se značkou na přední straně objektivu.
2. Twist the hood clockwise until it locks into place.

4. Návod k obsluze

4.1 Funkce automatického ostření (AF)

This lens supports autofocus (AF) functionality. Once mounted on a compatible camera, the camera's AF system will control the lens's focus. Refer to your camera's instruction manual for specific AF mode settings and operation.

4.2 Ovládání clony

The aperture (F-number) of this lens is controlled electronically through your camera body. You can adjust the aperture settings directly on your camera to achieve desired depth of field and exposure. The lens features a maximum aperture of F1.7 for excellent low-light performance and shallow depth of field, and a minimum aperture of F16.0.

4.3 Obecné použití

• **Photography Modes:** Use your camera's various photography modes (e.g., Aperture Priority, Shutter Priority, Manual) to control exposure settings in conjunction with the lens.
• **Focusing Distance:** The lens has a minimum focusing distance of 0.3m/1ft.
• **Filter Thread:** The front of the lens has a ⌀52mm filter thread for attaching compatible filters (e.g., UV, CPL, ND).

5. Údržba

5.1 Čištění objektivu

• K odstranění prachu z povrchu čočky použijte měkký hadřík, který nepouští vlákna, nebo kartáček na objektivy.
• For stubborn smudges or fingerprints, use a lens cleaning solution specifically designed for optical elements and a clean microfiber cloth. Apply the solution to the cloth, not directly to the lens.
• K čištění čočky nikdy nepoužívejte abrazivní materiály, rozpouštědla ani agresivní chemikálie.

5.2 Skladování

• Vždy nasaďte přední a zadní krytku objektivu, když objektiv nepoužíváte.
• Čočku skladujte na chladném a suchém místě, mimo dosah přímého slunečního záření a extrémních teplot.
• If storing for an extended period, consider using a dehumidifying agent to prevent mold growth.

6. Řešení problémů

6.1 Lens Not Focusing

• Ujistěte se, že je objektiv bezpečně upevněn k tělu fotoaparátu.
• Check your camera's focus mode settings. Make sure it's set to autofocus (AF) if you intend to use the lens's AF capabilities.
• Verify that there is sufficient light for the camera's autofocus system to operate effectively.
• Clean the lens contacts on both the lens and camera body with a clean, dry cloth.

6.2 Image Quality Issues (e.g., Softness, Aberrations)

• Ensure the lens and camera sensor are clean. Dust or smudges can significantly impact image quality.
• Check your camera's shutter speed and ISO settings to avoid motion blur or excessive noise.
• For optimal sharpness, consider shooting at apertures slightly stopped down from the maximum (e.g., F2.8 or F4 instead of F1.7).
• Verify that the lens is compatible with your camera model and that the camera's firmware is up to date.

7. Specifikace

8. Uživatelské tipy

• **Experiment with Aperture:** The F1.7 aperture allows for beautiful background blur (bokeh). Practice shooting at various apertures to understand how depth of field changes and use it creatively.
• **Low Light Performance:** Utilize the wide F1.7 aperture for excellent performance in low-light conditions, allowing for faster shutter speeds and lower ISO settings.
• **Prime Lens Advantage:** As a fixed focal length (prime) lens, it encourages you to 'zoom with your feet' by moving closer or further from your subject, which can enhance your compositional skills.
• **Lens Hood Usage:** Always use the lens hood, especially in bright conditions, to minimize lens flare and protect the front element from accidental bumps.

9. Záruka a podpora

For warranty information, please refer to the warranty card included in your package. For technical support, firmware updates, or additional resources, please visit the official Viltrox website or contact their customer service. A detailed user manual in PDF format may also be available for download on the manufacturer's webmísto.

Poznámka: The PDF user manual can be found at: Viltrox AF 25MM F1.7 APS-C Lens PDF Manual