DZOFiLM 20-70 T2.9 Linglung Cinema Lens User Manual

Linglung Cinema Lens
User’s Manual
20-70 T2.9 10-24 T2.9
LingLung
www.dzofilm.com

Introduction

Linglung series lenses are the products of DZOFILM for M4/3 cameras.
Thank you for your purchase of this product. Be sure that you have read this manual and understood its content before using the camera. Keep the manual where it will be read by all who use the product.
For repair, inspection, and internal tests, please contact your DZOFILM dealer.
Make sure that you use the lens correctly. Read the Manual carefully before use.

Product Care

• When using a lens hood, do not pick up or hold the camera using only the hood.
• Use a blower to remove dust and lint from the glass surfaces of the lens or filter. To remove smudges and fingerprints, apply a small amount of lens cleaner to a soft, clean cotton cloth or lens-cleaning tissue and clean from the center outwards using a circular motion. Do not leave smears or touch the glass with your finger.
• Never use organic solvents such as paint thinner or benzene to clean the lens.
• Attach the front and rear caps when the lens is not in use.
• Store the lens and filter in cool, dry locations to prevent mold and rust. Do not store in direct sunlight or with naphtha or camphor moth balls.
• Please keep the lens dry and wipe the water droplets off if there are droplets on the glass surface.
• Leaving the lens near a heater or in other extremely hot locations could cause damage or warping.
• There may be a case that the glasses of the lens mist when the lens is carried from a cool place to a high temperature and high humidity. To avoid a mist on the glasses, before using the lens, let the lens adjust to the ambient temperature of the place where the lens will be used.

Supplied Accessories

Front lens cap 1
Rear lens cap 1
Supporting rod 1
Supporting base 1
set ( including 2 bridge rods and 2 extension rods) Zoom lever socket 1 (removable)
Users’ Manual 1
Quality Card 1
Desiccant 1

Parts of the Lens

1. Front lens cap e Lens index
2. Focus ring
3. Service tap sockets *6 (M3, depth 4.5mm)
4. Zoom ring e Zoom lever
5. Zoom lever socket (M3, depth 3.5mm)
6. Aperture ring
7. F.f(flange focus) ring with lock knob
8. Rear lens cap
9. Screws of supporting base
10. Supporting base
11. Back supporting rod
12. Bridge rod (long)
13. Bridge rod (short)
14. Rear supporting rod socket (M3, depth 4mm)
15. Front supporting rod

Attach the Lens to the Camera

Remove the body cap from the camera and the rear cap from the lens. Place the lens on the mount, keeping the marks on the lens and the camera aligned, and then rotate the lens until it clicks into place. Note that in some cases there may not be a mounting mark on the camera body.
When attaching the lens, ensure that dust or other foreign matter does not enter the camera and be careful not to touch the camera’s internal parts. Do not press the lens release button while attaching the lens and be sure the latch has securely clicked into place.
Before using the lens for the first time or after attaching it to a different camera, measure the flange-back distance.

Attaching the Zoom Lever and Bridge/ Extension Rods

M4/3 mount could be loose on the connection between camera and lens due to the tolerance between different factories. To guarantee the shooting effect, this lens is equipped with two kinds of supporting methods. They are supporting rods on the front of the lens body, and the supporting base near the lens mount. When using camera cages, the front supporting rod is recommended to fix the lens and camera.
A rear supporting base is recommended to use when there is no camera cage. Attach the supporting rod of the base to the camera and screw it into the socket in the rear lens body. This can strengthen the stability between lens and camera.
Every lens is equipped with two extension rods to satisfy different cameras. Use extension rods if the bridge rod is not long enough.

Lens Control

Use the lens controls to zoom in to zoom out, adjust aperture, or focus.
Focus
Rotate the focus ring to increase or decrease the focus distance. Zoom
Rotate the zoom ring to zoom out, increasing the area visible in the frame, or zoom in on the subject so that it fills a larger area in the frame.
Aperture
Rotate the aperture ring to stop the aperture down, raising the f-number and narrowing the aperture, or lower the f-number to widen the aperture.
Flange Back Adjustment Rotate the flange-back adjusting ring, increasing or decreasing the flange back distance

Adjusting the Flange Back Distance

Linglung series lenses will all go through flange back adjustment based on M4/3 standard before shipping, but flange back distance can vary on different cameras. If the flange back distance is incorrect, the camera will not focus at the correct distance. Linglung series has a fast adjustment structure that is placed between the aperture ring and lens mount.

To correct the flange back distance, please follow the steps below.

1. Ready your object. You can use a “Siemens Star”, a pattern of black-and-white radiating spokes available on the www.dzofilm.com website. Download and print it.
2. Attach the lens to the camera;
3. Stop the aperture at 12.9;
4. Zoom out to 24mm or 70mm
5. Rotate the focus ring to focus on the Siemens star. Find the position at which the black-and-white spokes are the sharpest.
6. Zoom in to thelOmm (for 10-24mm) or 24mm (for 20-70mm);
7. Please make sure the focus ring remains unchanged and calibrate the object to the sharpest only by adjusting the back flange ring
8. repeat Steps 3-7 for two to three times. When the best focus stays in the same position in all different focus distances, the calibration finishes. The situation may vary in different cameras, and please repeat the steps to make sure the focus is sharp in both wide angle and long focus distances.
9. Lock the screw rod on the back flange distance after calibrating. Theoretically, the back flange needs to re-calibrate after changing to other cameras.

Specification

mm (1)21.6 mm) aspect ratio 1.33:1
The flange back (in the air)| 19.2mm (adjustable by±0.3mm)| 19.2mm (adjustable by±0.3mm)
Minimum object distance (from the focal plane)| 0.79m/2ft7in.| 0.61 m/2ft
Angle of view
Horizontal| 47.5°-14.3°| 79.7°-40.33°
Vertical| 36.5°-10.8°| 64.1°-30.8°
Diagonal| 57.6°-17.9°| 92.5°-49.3°
The area photographed at the close focus distance| 20mm: 568 mm429 mm| 10mm: 608 mm456 mm
70mm: 162 mm122 mm| 24mm: 268 mm201 mm
Effective lens diameter
Front element| 53.0 mm| 57.0 mm
Rear element| 25.8 mm| 25.8 mm
Aperture control| Manual (ring rotates up to 72°)| Manual (ring rotates up to 55°)
Zoom control| Manual ( ring rotates up to 100°)| Manual (ring rotates up to 100°)
Focus contort| Manual (ring rotates up to 270°)| Manual (ring rotates up to 270°)
External dimensions: diameterlength (approx.)| 4)82.0153.3mm| 4)82.0*148.9mm
Weight (approx., excluding lens cap and  bridge rods)| 1100g| 1100g
External diameter in front of the lens| 4)80 mm| 4)80 mm
Filter diameter| 4)77 mm| –
Gear pitch (aperture, zoom, and focus| 0.8 M| 0.8 M
Number of blades| 12| 12

*Improvements may result in unannounced changes in specification and appearance. Owing to how this lens has been constructed the distance shown by the camera focus distance indicator (distance indicator)may in some cases differ from the actual focus distance. (Use the “distance indicator” as a guide only).

Appearance

Repair and Maintenance

Repairs Return the product to the point of purchase for repairs. Please note that we reserve the right to refuse service in the event of damage so severe that there is little hope of function being restored, whether said damage is caused by physical shocks, immersion in sand, mud, water, or the like.
Warranty service
Should the product malfunction in the course of normal use as set forth in the users’ manual and accompanying documentation, it may be returned to the point of purchase for repairs within the warranty period. The owner is responsible for all shipping costs. The warranty period varies with the country or region of purchase. Stored dated receipts or other proof of purchase in a safe place, as it will be required for repairs made under warranty.
Service Outside the Warranty Period
Request for service will normally be accepted within a period of roughly S years following the end of production, during which time spares will be kept on hand, although owners may be offered an equivalent product during this period in the event that spares are not available. Compatibility with consumables and accessories for the original product is not guaranteed. To prevent waste, repairs or replacements may be made using refurbished parts or products, and DZOFILM may collect returned parts or products for later use. When returning a product for repair, please let us know if you need the original parts.
Privacy
DZOFILM obeys all applicable laws and regulations concerning the handling of names, addresses, phone numbers, and other personal information provided by users.

Shenzhen Dongzheng Optical Technology Co., Ltd.
1 F., Building One, Xinwuxia Industrial Park, No.32, Cubao
Rd., Baolong St., Longgang Dist., Shenzhen 518000, China
+86 755-2890 8505
www.dzofilm.com

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