SVBONY SV550 Bedienungsanleitung Seite 4

Inserting the eyepiece:
separately.
1.Loosen the three thumbscrews on the end of the focuser tube.
2.Insert the 2" diagonal into the focus tube and re-tighten the thumbscrews to hold the diagonal in place.
3.Loosen the diagonal's screw
4.For 2" eyepieces, insert it into the diagonal and secure it by re-tightening the thumbscrew.
5.For 1.25" eyepieces first insert the 2" to 1.25" adapter into the diagonal and secure by retightening the screw. Loosen the adapter's screw
and insert the 1.25" eyepiece inside the adapter ring, then secure it by retightening the screw
Focusing
Using the telescope for prime focus imaging
Installing the reducer / flattener and a DSLR camera with OTA.
Note: All accessories are for display only, you need to buy them separately.
1.Use a hex wrench to remove the adapter （M54 to 2 inch）on the focusing base.
2. Install the 0.8X Reducer/flattener on the focusing base.
3.If not yet done, screw the extender tube onto the flattener
4.Screw the enlarged 48mm T-Ring onto the extender tube.
5.Install your DSLR camera on the 48mm enlarged T-Ring
Installing the field flattener and a CCD/COMS (Charge-Coupled Device) Camera
Note:All accessories are for display only, you need to buy them separately.
1.Installing an astronomical camera and its accessories (filter wheel, radial guider...)
behind the field flattener is not as straightforward as installing a DSLR camera. All DSLR
cameras have the exact same distance from the front side of the T-Ring adapter to the
sensor, thus share the same extension rings to ensure the 55mm back focus distance.
2.Astronomical cameras differ from one model to another, even in the same brand name,
by the threads used and the body-to-sensor distance. Accessories also have different
possible threads and depths; thus, the combination of a camera and its accessories can
have any total length and any coupling thread.
3.The 55mm distance is measured from the edge marking the start of the male thread on
the field flattener, to the sensor.
All the accessories are only for demonstration and you need to purchase them
1.Make sure the locking lever below the focuser is unlocked.
2.Slowly turn the focus knobs one way or the other, until the image in the eyepiece is
nearly sharp.
3.To finely focus the image turn the 1:10 knob one way or the other until the image is
perfectly sharp.
4.Lock the screw below the focuser if a heavy load is attached (pull the lever at 90°).
5.The image usually has to be finely refocused over time, due to small variations caused
by temperature changes. This often happens when the telescope has not yet reached
outside temperature.
6.Refocusing is almost always necessary when you change an eyepiece.
When looking through a diagonal, the image is inverted left to right, as an image in a
mirror. This is normal and has no incidence for astronomical observations.
If you plan to do terrestrial observation often, like bird watching, optional
image-erecting devices such as the Amici prism or the erected 90° diagonal may be the
right tool. We will be glad to advise you about the best optional part that can be used with
your telescope
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