oConnor C1242-0002 User Manual

User Guide

O-Focus DM Photo Set

O-Focus DM Cine Set

C1242-0001
C1242-0002

User Guide

Copyright © 2011 The Vitec Group plc

All rights reserved throughout the world. No part of this document may be stored in a retrieval system, transmitted, copied or reproduced in any way, including,
but not limited to, photocopy, photograph, magnetic or other record without the prior agreement and permission in writing from the Vitec Group plc.

Caution

!

Ÿ DO NOT hang heavy items over the handwheel.

Ÿ DO NOT attempt to move the camera by pulling on the O-Focus

DM handwheel.

Ÿ AVOID overtightening the drive gear onto the lens focus drive.

Ÿ ALWAYS use genuine OConnor parts and accessories with the

O-Focus DM.

Ÿ ALWAYS dismantle when not in use and before transporting.

Ÿ Never use solvents to clean the O-Focus DM. Wipe clean with a

damp cloth.

O-Focus DM

3

Contents

Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

The O-Focus Dual Mini . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

O-Focus DM Photo

Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

In th

O-Focus DM Cine

Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

In th

camera rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

mounting the O-Focus to the lens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

setting the focal distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Options and extras . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

OConnor Offices worldwide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

e box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

e box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Assembly

assembling the bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

mounting the handwheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

mounting onto the

The O-Focus DM Cine

4

Congratulations on the purchase of your new OConnor O-Focus DM!

We want you to get the most from your new O-Focus Dual Mini, and therefore encourage you to read this user
guide to familiarize yourself with its many features, some of which may be new to you. It also covers essential
information about safety and product care.

Features and benefits of your new O-Focus DM

The O-Focus Dual Mini, the latest addition to the range of genuine accessories from OConnor, offers a host of
inspired and productive features:

Ÿ the double-sided follow focus is constructed of lightweight, durable black anodized aluminum

Ÿ the low-profile design with a direct-drive gear is ideal for large barrel diameter lenses

Ÿ optimized focus throw: the O-Focus DM Photo offers a longer, more exacting focus pull for short

throw lenses and the O-Focus DM Cine offers a shorter, more exacting focus pull for cine lenses

Ÿ multi-functional, modular design: the bridge features a sliding dovetail design and accommodates

an LWS rod bridge (included) or, optionally, a heavy-duty bridge for 15/19 mm studio setups, as
well as interchangeable gears, mixed or matched handwheels, and a handwheel extension

Special features

The O-Focus DM is the first compact cine-specific unit. The O-Focus DM Photo has been optimized for use with
still photo lenses in cine setups.

The highly adaptable O-Focus DM Cine has been designed for precision movement control of higher sustained
torque loads. The eccentric design means it can be adjusted for optimal ‘line of sight’ as well as for reach.

The O-Focus DM follow focus integrates seamlessly with standard equipment such as cranks, gears, and whips,
thus protecting your investment in equipment by ensuring compatibility also in the future.

5

6

O-Focus DM Photo Set (C1242-0001)

Weight of unit (incl. LWS rod bridge, handwheel) . . . . . . . . . . . . . . . . . 1.23 lbs (0.56 kg)

Weight of bridges (excl. handwheel). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.73 lbs (0.33 kg)

Dimensions (excl. handwheel) . . . . . . . . . . . . . . . . . . . 7.2 m)

Dimensions of hard-stop handwheel . . . . . . . . . . . . . . . . . . . . . Ø3.2 x 3.7 in. (Ø82 x 94 mm)

Gear ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19:25 (0:.75)

Positioning of driver gear . . . . . . . . . . . . . . . . . . . . . . . . . . main bridge interlock (back / front)

Module coupling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . backlash-free

Drive gear coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . standard serrated star

Rod system compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . 15 mm LWS, studio 15 mm/19 mm

Gears and friction wheel (see table on page 10 for details)

x 2.2 x 1.5 in. (182 x 57 x 37 m

Max. lens diameter (with LW rods). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ø116 mm

Specifications are subject to change without notice

Specification

7

In the box

O-Focus DM
Main bridge

C1242-1300

15 mm
LWS rod bridge

C1241-1540

O-Focus Hard-Stop
Handwheel

C1242-1100

Marking Discs
(conical, 10 pack)

C1242-1530

Friction Driver 35

C1242-1001

Gear Z60

C1241-1900

Gear Z35

C1241-1700

Gear Z43

C1241-1600

Gear Z50

C1241-1800

O-Focus DM Photo Set

C1242-0001

(for details about driver sizes and lenses see table on page 10)

Matching OConnor accessories:

Studio rod bridge

C1241-1100 (depending on lens)

Handwheel (for double-sided use)

C1241-1100 (Cine)
C1242-1100 (Photo)

Handwheel extension (70 mm)

C1241-1500

Marking disc

C1242-2421 (single, small)

O-Focus DM Cine Set (C1242-0002)

Weight of unit (incl. LWS rod bridge, handwheel) . . . . . . . . . . . . . . . . . 1.52 lbs (0.69 kg)

Weight of bridges (excl. handwheel). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.73 lbs (0.33 kg)

Dimensions (excl. handwheel) . . . . . . . . . . . . . . . . . . . 7.2 m)

Dimensions of Cine handwheel. . . . . . . . . . . . . . . . . . . . . . . . . . Ø4 x 3.2 in. (Ø102 x 81 mm)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ø116 mm

Gear ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4)

Positioning of driver gear . . . . . . . . . . . . . . . . . . . . . . . . . . main bridge interlock (back / front)

Module coupling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . backlash-free

Drive gear coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . standard serrated star

Rod system compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . 15 mm LWS, studio 15 mm/19 mm

Gears and friction wheel (see table on page 10 for details)

x 2.2 x 1.5 in. (182 x 57 x 37 m

Max. lens diameter (with LW rods)

35:19 (1:1.8

Specifications are subject to change without notice

Specification

8

In the box

9

O-Focus DM
Main bridge

C1242-1300

15 mm
LWS rod bridge

C1241-1540

CFF-1 Studio Handwheel
(full-size offset knob)

C1241-1100

Marking Discs
(10 pack)

C1241-1530

Friction Driver 35

C1242-1001

Gear Z60

C1241-1900

Gear Z35

C1241-1700

Gear Z43

C1241-1600

Gear Z50

C1241-1800

O-Focus DM Cine Set

C1242-0002

(for details about driver sizes and lenses see table on page 10)

Matching OConnor accessories:

Studio rod bridge

C1241-1300 (depending on lens)

Handwheel (for double-sided use)

C1241-1100 (Cine)
C1242-1100 (Photo)

Handwheel extension (70 mm)

C1241-1500

“Glow-in-the-dark” marking disc

C1241-2117 (single disc, large)
C1241-1531 (10 pack, large)

10

Components

Part no.

Gear size

C1241-1700

C1241-1600

C1241-1800

C1241-1900

C1242-1001

35 tooth 0.8M 10 mm face

43 tooth 0.8M 6 mm face

50 tooth 0.6M 7.5 mm face

60 tooth 0.5M 7.5 mm face

Ø39 mm surface

Lens type

Cine

Cine

Canon ENG focus

Fujinon ENG focus

non-geared photo
lenses

LWS rod bridge

main bridge

lock lever

flip-lock

rod clamp screw

witness marker

eccentric
CINE handwheel

bridge interlock

(with output gears)

marking disc

lock lever

index

driver gear

O-Focus DM Cine

C1242-0002

standard square socket
for attachments

11

Components

LWS rod bridge

main bridge

lock lever

(rod bridge)

flip-lock

rod clamp screw

centric
hard-stop handwheel

bridge interlock

(with output gears)

lock lever

index screws

O-Focus DM Photo

C1242-0001

standard square socket
for attachments

conical
marking disc

witness marker

driver gear

lock lever

lock lever

hard-stop
slider button

Assembly – assembling the bridge

1

2

Mount the driver gear. Choose a compatible driver
gear for your lens (see page 10). Locate the driver
on the output gear at the front or back of the
interlock bridge as desired. Ensure the serrations
fully interlock, then tighten the hollow knurled screw.

Assemble the bridges. Slide the LWS rod bridge onto
the main bridge. Turn the lock lever clockwise to
secure the LWS bridge in position.

The position of the main bridge can be adjusted using
the sliding dovetail when mounting the O-Focus DM
to the lens (see page 14).

Front and back output gears

Double-sided design

12

Flip-lock rod
clamp lever

mounting the handwheel

The O-Focus DM incorporates a Minimal Backlash Mechanism
to guarantee precision focus pull with less play and higher
accuracy. Note that the assembly instructions apply to both
types of handwheel.

Push-fit the handwheel firmly onto the
main bridge. The handwheel must be

fully engaged for the backlash­reducing mechanism to be effective.

When mounting the assembled bridges and
handwheel onto the camera rods underneath
the lens: Turn the knurled screw clockwise to
tighten the rod clamp, then flip down to lock the
O-Focus DM securely on the rod.

1

2

3

Turn the lock lever clockwise to
secure the handwheel on the main
bridge.

NOTE: Lock levers are fitted with a spring. Should a lever obstruct

the path of a camera rod, for example, adjust its position:
Pull the lever off the shaft as far as possible, turn it a few
degrees, then let it retract. Check the clamping is tight.

13

mounting onto the camera rods

Mounting the O-Focus DM to the lens requires the assembly to
be adjusted in two steps: first assemble and mount the O-Focus
on the camera rods, then adjust the main bridge, until the driver
gear engages with the lens focus drive.

For more information about the focal length and diameter of a
wide range of camera lenses visit OConnor Labs online at the
OConnor website (OConnor > Labs > ‘Lens Diameters’).

Mount the O-Focus DM to the lens focus
drive. Push the main bridge towards the lens
focus drive, until the serrations of the driver
gear fully engage. Take care not to overtighten
the gear on the lens focus drive.

With the 15 mm LWS rod bridge securely
mounted underneath the lens, turn the lock
lever counter-clockwise to release the main
bridge assembly.

1

2

14

mounting the O-Focus to the lens

Depending on the setup, the LWS rod bridge can also be replaced
with a studio bridge to accommodate heavy-duty 15 mm or 19 mm
studio camera rods (see page 10).

(see OConnor >

Labs > ‘Rod Standards Explained’).

For more information about different types of camera rods visit
OConnor Labs online at the OConnor website

Turn the lock lever clockwise to secure the
main bridge in position. Ensure the bridge is
firmly locked to avoid backlash.

Turn the handwheel and make sure that the
driver gear engages with the lens focus
drive adjusting the lens focus smoothly in
either direction.

4

3

15

1

setting the focal distances

16

Set the lens focal range for the O-Focus DM Photo. Using a
suitable pen mark the reference points for the maximum and
minimum focal distances. Hard stops prevent lenses with
infinite rotation from being turned too far. The hard stops can
also be used as hard focus points for run and gun shooting.

Using the handwheel find the start focal
point, mark this point and set the index.
Turn the handwheel and establish the
end stop of the focus pull. Mark with a
pen, then adjust the index stoppers.

Set the focal distances. Loosen the index,
move the large witness marker to the end
position, and tighten the screw. For the
start position set the index slightly beyond
the first marker. Finally, move the slider
button between the stops, then push it in.

2

Mount the marking disc. Align the tongue
on the handwheel with the cutout on the
marking disc, then push the disc onto
the handwheel until it audibly ‘clicks’ into
place.

Set the initial lens focus and loosen the
index to set it to the preferred eye level.
Use a pen to mark the focal reference
points on the marking disc, until the
desired distance is marked out.

CAUTION: Always remove the marking disc before cleaning. Do not use

solvents on the O-Focus DM. Follow the instructions supplied
with the marking pen when cleaning the marking discs.

If preferred, set the witness mark to
another focal reference point. Adjust the
index as required.

The O-Focus DM is now set up and
ready for use.

3

2

1

focus pull

setting the focal distances

17

Set the focal distances for the O-Focus DM Cine. Using a suitable
pen mark the lens focal reference points. The focus throw is
optimized for cine lenses to provide a shorter, more exacting
focus pull.

Options and extras

18

For larger camera packages the O-Focus DM can also be used
with an optional 70 mm handwheel extension (see page 7 for
details). The eye level of the eccentric CFF-1 studio handwheel
can be adapted for optimal ‘line of sight’ and for reach.

Handwheel extension
(70 mm)

The O-Focus DM has been optimized to work with
still photography lenses used in cinema applications.
A toothless friction driver wheel is included for use
with non-geared, rubber focus barrel still lenses.

Note: Adjust the handwheel index up or down

for your preferred eye level.

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