Omegon Syncrofocus Flip Mirror Finder Instruction Manual [EN]

expose the T-thread male camera ring (#3). Simply
thread the camera and use the T-Ring (#2) to lock the

The Omegon® Syncrofocus Flip Mirror Finder

Congratulations on the purchase of the new Omegon®
Syncrofocus Flip Mirror Finder. This device is designed to
precisely centre planets, the Moon or even Deep Sky objects in a
camera Frame. The spring-loaded mirror inside the device re­directs the light to the centring eyepiece or to the camera. This
makes the tedious centring procedure very easy and fun.

1. What’s included
1- 1.25” to T camera adapter;

2- T-Ring;
3- T-threaded male camera ring;
4- 1.25” eyepiece adapter;
5- eyepiece back-focus locking ring;
6- 1.25” nosepiece adapter;
7- Spring-loaded thumbscrew

camera in the suitable position/angle. 4. Possible setup
combinations. The flip-mirror device can be use with a
variety of eyepieces and cameras. Please look at the tree
bellow for guidance.

A – Reticule eyepiece B- low power eyepiece
C – DSLR camera T2 – T Ring
CCD – deep-sky camera CMOS – planetary camera

2. Getting Started. First get familiarized with the device.

The mirror system moves up-and down by rotating the
spring-loaded thumbscrew (#7). Rotating up (counter­clock-wise) the in-coming light from the telescope hits
the camera sensor. Rotating down (clock-wise) the light
is deviated to the centring eyepiece. The purpose of this
accessory is to re-direct the light from the telescope to
either the eyepiece or the camera without the need to
refocus. Object centring becomes much easier. Cameras
have usually a very small field of view when compared
with a low-power eyepiece and only a tiny portion of the
sky is captured on the sensor making objects centring
very hard. 3. Before starting. 3.1. Choosing the centring
eyepiece. The centring eyepiece should be a low
magnification eyepiece (40x up to 60x). A low
power/magnification eyepiece provides a huge field of
view for searching and centring objects. Most 1.25”
eyepieces can be used. 3.2 Using the eyepiece. Insert

the eyepiece in the 1.25” eyepiece adapter (#4). This

threaded adapter can rotate and adjust the eyepiece’s
distance to the device. Make sure to tighten the side
thumbscrew so that the eyepiece is securely hold in
place. Release the eyepiece back-focus locking ring (#5)
to rotate the 1.25” eyepiece adapter (#4). Use it to lock
the eyepiece into a certain position – see the
parfocalization section. 3.3. Choosing the camera. Deep­Sky or planetary cameras can be used. Slide a 1.25”
camera in the 1.25” to T camera adapter (#1) and use
the two thumbscrews to lock in position. If a T-Thread
camera is being used, we recommend connecting the
camera directly to the device’s body (#3). Release and
remove the 1.25” to T camera adapter (#1). This will

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4. How to use the device. First it is needed to
parfocalise the centring eyepiece with the camera’s
sensor. Parfocalisation means both the eyepiece and
camera are at same focus so that when flipping the
mirror up-down a sharp focused image is obtained for
both. By rotating the spring-loaded thumbscrew (#7) the
centred object in the eyepiece can be immediately seen
in the centre of the camera sensor. 5.1. How to
parfocalise the flip mirror? We recommend the
following procedures being executed during the day.
Start by attaching the camera as described in 3.3. and
the flip-mirror to the telescope. Point the telescope to a
distant object (more than 1000m) and use the
telescope’s focuser so that a sharp image comes to
focus in the camera sensor – make sure that the mirror
is in the camera position so it does not obstruct the
incoming light from reaching the camera. Now it is time
to adjust the eyepiece distance to the flip-mirror. Insert
the eyepiece in the 1.25” eyepiece adapter (#4) as
described in 3.2. do not use the telescope’s focuser
during this procedure! Just flip the mirror up-down. The
image obtained in the eyepiece will be defocused. This is
because both the camera and eyepiece are not parfocal.
Release the eyepiece and slide it up and down until the
image starts to be formed (focused). By doing so one
understands if the eyepiece needs to move farther away
from the flip-mirror or the exactly the opposite i.e.
closer to it. Rotate the 1.25” eyepiece adapter (#4) as
described in 3.2. and use the eyepiece back-focus ring to
lock in position (turn clock-wise). You are now ready to
start using the device!

19.02.2016 English Version REV. A