Omegon 49754 User Manual

Instruction Manual
Congratulations on the purchase of the new Omegon® Smartphone and Camera Adapter. This adapter is designed to hold most modern
smartphones and digital compact cameras. It fits to most 1.25" telescope eyepieces making afocal high-power telescope astrophotography
easy and fun. It can also be used with spotting scopes eyepieces for terrestrial afocal photography. This adapter allows precision
mechanical to optical axis centring thus providing sharp pictures and giving consistent results.

1. Parts

The adapter consists of two main parts.
The adapter's body which is made from aluminium (figure 1) with its two built-in thumbscrews and threaded shafts to adjust the
platform's (J – figure 1) position to the smartphone bracket. The bracket (M) securely holds a smartphone or a digital compact camera.
Besides that, the two additional supplied ¼"-20 knobs (N) are used to fix the bracket (M) to the platform (J).
Figure 1.
A- clamp knob
B- clamp
C- eyepiece housing
D- slot
E- ¼"-20 three lobed knob
2. What is afocal photography. The Omegon® Smartphone and Camera adapter is designed for afocal photography with a telescope. A
camera or a smartphone captures the image formed by the telescope's eyepiece. This technique, called afocal photography, is very
popular as it is very easy to do. The object centred in the eyepiece's field of
view (FOV) - focused like you would do for visual use - can be
photographed by a smartphone's camera or a compact camera. Although it
is possible to take afocal photos by holding a smartphone by hand and
reaching it close to the telescope's eyepiece, the results obtained with
such a technique are usually mediocre. The hand is not a stable platform.
In order to obtain consistent quality sharp images a rock solid platform is
required. It is also important to align the camera's objective parallel to the
eyepiece and that all optical axes are aligned. This is only possible by using
an adapter that allows to finely adjust the position of the camera and fixing
it to the eyepiece! The eyepiece should be a long eye relief eyepiece.
These types of eyepieces, when compared to traditional eyepieces, create
the focused image much farther away from the eyepiece lens itself, making
it easier for the camera to photograph the complete FOV.
2.1. Getting started. Start by releasing the two post knobs (K) - as shown in
figure 1 - the internal built-in spring system will push the posts up allowing
for the device to be slided-in. Make sure to release it so there is enough
room for the smartphone to slide-in. Remember that the device's
maximum width should not exceed 80mm. Sliding the device is easy but
make sure the smartphone slides in the direction of the left L-shaped post
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F- height adjustment knob
G- base
H- sideways adjustment knob
I- locking knob
J- platform
Figure 2. Release the two Smartphone fixing knobs (I)
Art.- Nr. 49754
K- post knobs
L- post (left and right)
M- bracket
N- ¼"-20 knobs
O- ¼"-20 holes