DZOFILM 20-70 T2.9, 10-24 T2.9 Linglung Cinema Lens User Manual
- June 3, 2024
- DZOFILM
Table of Contents
DZOFILM 20-70 T2.9, 10-24 T2.9 Linglung Cinema Lens User Manual
Introduction
Lingtung 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 test, 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 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
- Front tens cap
- Lens index
- Focus ring
- Service tap sockets *6 (M3, depth 4.5mm)
- Zoom ring
- Zoom lever
- Zoom lever socket (M3, depth 3.5mm)
- Aperture ring
- F.f(flange focus) ring with lock knob
- Rear lens cap
- Screws of supporting base
- Supporting base
- Back supporting rod
- Bridge rod (long)
- Bridge rod (short)
- Rear supporting rod socket (M3, depth 4mm)
- 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 rod
on the front of the lens body, and the supporting base near the lens mount.
When using camera cages, front supporting rod is recommended to fix lens and
camera.
Rear supporting base is recommended to use when there is no camera cage.
Attach 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.
Rotate the focus ring to increase or decrease the focus distance.
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.
Rotate the aperture ring to stop aperture down, raising the f-number and
narrowing the aperture, or lower the f-number to widen the aperture.
Rotate 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 fast adjustment structure which is placed between aperture ring and lens mount.
To correct the flange back distance, please follow the steps below.
- 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.
- Attach the lens to the camera;
- Stop the aperture at T2.9;
- Zoom out to 24mm or 70mm
- Rotate the focus ring to focus on the Siemens star. Find the position at which the black-and-white spokes are the sharpest.
- Zoom in to the10mm (for 10-24mm) or 24mm (for 20-70mm);
- Please make sure the focus ring remains unchanged and calibrate the object to the sharpest only through adjusting the back flange ring
- repeat Step 3-7 for two to three times. When the best focus stays in a same position in all different focus distance, 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 distance.
- Lock the screw rod on the back flange distance after calibrating. Theoretically the back flange need to re-calibrate after changing to other cameras.
Specification
| Specifications | 2o-70 | 10-24 |
|---|---|---|
| Lens mount | M4/3 mount | M4/3 mount |
| Focal length | 20-70 mm | 10-24 mm |
| Zoom ratio | 3.5X | z.4x |
| Minimum T-stop | T2.9 | T2.9 |
| Aperture range | T2.9-T22 | T2.9-T22 |
| Frame size | 17.31mm*12.98mm(@21.6mm)acpect ratio 1.33:1 | 17.31 mm*12.98 mm |
(@21.6 mm)
flang back in air| 19.2mm (adjustable bya0.3mm )|
minimum objict distance from focal plane| 0.79m/2ft7in.| 0.61m/2ft
Angle of view
Horizonal| 47.5°-14.3°| 79.7°-40.33°
vertical| 36.5°-10.8°| 64.1°-30.8°
8’8g888!| 57.6°-17.9°| 92.5°-49.3°
Area photographed at close focus distance| 20mm: 888 mm”429 ^^| 10mm: 608
mm”456 mm
70mm: 162 mm”122 mm| 24mm: 268 mm”201 mm
Effective lens diameter
Front element| 53.0 mm| 57.0 mm
Rear element| 25.8mm| 25.8mm
Apenure control| manual (ring rotates up to 72)| manual (ring up to 55)
zoom control| manual (ring rotates up to 100)| manual (ring rotates up to 100)
Focus contorl| manual (ring rotates up to 270)| Manual ( ring rotates up to
270°)
External dimensions:
diameter length (app p@@
| ) gB2 0”3 53.3mm| @82.0*148.9mm
weight (approx.excludinglens cap and bridge rods)|
1100g
|
1100g
External diameter at front of lens| @80 mm| @80mm
Filter diameter| g77 mm| –
Gear pitch (aperture,zoom, and focus)| 0.8 11| 0.8 N
Number of blades| 12| 12
*Improvements may result in unannounced changed on specification and appearance. Owing to how this lens is 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, or 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 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 5 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 replacement 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.