DZOFILM 20-55mm T2.8 50-125mm T2.8 User manual

Pictor Zoom Cinema Lens
User Manual
20-55mm T2.8 50-125mm T2.8
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Introduction
Pictor Zoom series lenses are the products of DZOFILM for S35
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.
● When using a matte box, 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 th e 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.
Product Care
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Supplied Accessories
Parts of the Lens
Front cap
PL mount
Supporting base
Case for shims
Zoom lever (detachable)
DZOFILM QC & Support Card
Screws for PL bayonet (M2*5, 12pcs)
2,5mm hexegon driver (for supporting base)
Shims * 1set (T0.3*1;T0.1*1;T0.05*2;T0.03*2;T0.02*2)
EF rear cap
PL rear cap
Case for shims
Supporting rod*2
Pictor Zoom Sticker
T6 Trox driver (for bayonet)
Screws for Supporting base (M3*8, 8pcs)
❶Front cap
❷Markings
❸Focusing ring
❹ Zoom lever socket*4 （M3*4mm)
❺Zoom lever
❻Zoom ring
❼Iris ring
❽EF rear cap
❾Socket for supporting base*2
(M3*3mm)
12 3 4 5
6
7 8
9
10 11 12
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Attach the Lens to the Camera
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.
Focus ring
Zoom ring
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 ring
Aperture
Rotate the aperture ring to stop
aperture down, raising T-stop
narrowing the aperture, or lower the
T-stop the aperture.
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.
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Pictor Zoom series lenses will all go through flange back test with
shims based on S35 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.
How to Adjust Back Focus of Pictor Zoom
1.To start with, prepare a Siemens Star chart, or other black-and-white
(high-contrast) resolution chart to test;
2.Attach your Pictor Zoom lens to the camera;
3.Rotate the iris to wide open;
4.Set up Siemens Star chart at 1.5M(4.9 Feet) away from the camera
(flange), and make sure the target is in the image center.
A. Zoom in to the longest focal length, focus on the target until the target is
sharpest, and mark down the focus distance as S1.
B. Zoom out to the widest, focus on the target until the target is sharpest,
and mark down the focus distance as S2.
C.If the figure S2 ＜ S1, increasing shim(s) is needed; If S2 ＞S1, then reduce
the shim(s).
D.Repeat step A to C until S2=S1. At this moment the lens is under Parfocal.
The testing target should lay on
the center of image, and 1.5M away
from the camera sensor
Maximum T-stop
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PS:This table is only for reference
Minus sign: Shims need to be removed; Plus sign: Shims need to be added
Table for flange distance adjustment
1.5m
0.9
1
1.1
1.2
1.3
1.4
1.5
1.7
2
+0.36
+0.27
+0.19
+0.14
+0.1
+0.05
0
-0.04
-0.1
2.5 -0.16
3 -0.18
3.5 -0.2
4.5 -0.24
6-0.27
10 -0.3
55mm object distance
at best focus
20mm object distance
at best focus Change of total shim
thickness(mm)
Table for flange distance adjustment
1.5m
1.3m
1.35m
1.4m
1.5m
1.6m
1.7m
1.8m
+0.33
+0.2
+0.12
0
-0.1
-0.25
-0.37
125mm object distance
at best focus
50mm object distance
at best focus Change of total shim
thickness(mm)
S1 S2
S1 S2
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Align the groove under the PL bayonet to the positioning pin. Place
the bayonet plat on the rear of the lens；
Slightly twist the mount, and make sure the bayonet is in plat
condition;
Finally drive 8pcs M2*5 screws into screw holes in symmetrical order
Assemble PL Mount
Positioning pin
groove under PL Bayonet
M2*5 screws
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Align the groove under the EF bayonet to the positioning pin. Place
the bayonet plat on the rear of the lens；
At this moment, the groove on the surface shall align the Arrow
Mark and Reticle. If not, that means the position of bayonet is
incorrect.
Slightly twist the mount, and make sure the bayonet is flat;
Finally drive 7pcs M2*18 screws into screw holes in symmetrical
order.
PS. After chaning the mount into EF mount, the rear glass element
exceeds the mount a little bit. Do not place this end on the desk
without rear cap in order to avoid scratches.
Assemble EF Mount
Positioning pin
Groove under EF bayonet
Arrow Mark Reticle Groove on the surface of
EF bayonet
M2*18 Screws
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*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).
Specification
Specifications 20-55 50-125
Focal length 20-55 mm 50-125 mm
EF/PL EF/PL
Zoom ratio
Minimum T-stop
2.75X 2.5X
T2.8 T2.8
Aperture range
Image Circle
Flange Distance
Close Focus Distance
(to sensor)
T2.8-T22 T2.8-T22
24.89 mm*19.3 mm（φ31.5 mm）
ratio 1.33:1
24.89 mm*19.3 mm（φ31.5 mm）
ratio 1.33:1
52mm(PL) / 44.14mm(EF） 52mm(PL) / 44.14mm(EF）
0.6m/2ft 0.8m/2ft8in
20mm：547 mm * 24.8mm
55mm：193mm*146 mm
50mm：348 mm*257 mm
125mm：132mm*100 mm
Effective lens Dia.
Front
Back
53.0 mm
25.8 mm
61.0 mm
29.4 mm
Aperture control Manual（ring rotates up to 65°）
Manual（ring rotates up to 100°）
Manual（ring rotates up to 270°）
Manual（ring rotates up to 72°）
Manual（ring rotates up to 100°）
Manual（ring rotates up to 270°）
Zoom control
Focus contorl
φ95.0*164mm(PL）
φ95.0*171.9mm(EF）
φ95.0*175mm(PL）
φ95.0*182.9mm(EF）
≈1520g ≈1700g
Front Outer Dia. φ95 mm φ95 mm
Filter Size
Gear Pitch
(aperture,zoom,and focus)
Number of blades
Size:
Weight:
M86*0.75 M86*0.75
0.8 M 0.8 M
16 Pcs 16 Pcs
Vertical
Horizontal
Diagonal
Shooting Area under
Close Focus
Lens mount
64.3°- 24.8°
49.6°- 19.0°
78.0°- 30.6°
28.1°-10.8°
20.9°-8.2°
35.8°-13.3°
FOV.
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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
Repair and Maintenance
Appearence
20-55
50-125
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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.
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