[Use of astronomical telescope
s] How to use astronomical telescopes correctly with steps and guidelines
1 , Install the astronomical telescope according to the instructions.
2. About the focusing of the telescope and the calibration of the reticle finder
Loosen the two retaining screws on the eyepiece tube. Take out the low-power eyepiece and install it on the eyepiece tube, and then tighten the screw. Adjust the focus knob to obtain a blurred image of a distant object A, and then slowly adjust the focus knob back and forth until the object image is clear. The telescope has been precisely focused and can now be observed with the finder. If the finderscope is not in focus, rotate the eyepiece until a clear image appears. When the object image of object A you see on the telescope is not in the center of the crosshairs of the finderscope, adjust as follows: Tighten or loosen the intermediate screws on the finderscope bracket, so that the finderscope is up and down, left and right. Move diagonally. When the object image of Object A appears in the center of the reticle, your finderscope is calibrated, and finally tighten the three screws. Then replace the low-power eyepiece with a high-power eyepiece and repeat the above procedure. If the center of the image observed under the highest magnification eyepiece is also at the center of the finder reticle, your finder is aligned. Now you can quickly find the objects you want to observe. In very special cases, the finderscope may also need to be adjusted.
3. Precautions
A. In any case, first use the finder to look for objects , because the finderscope has a larger field of view, which can greatly speed up your coarse adjustment.
B. Under normal circumstances, install the low-power eyepiece first, and gradually increase the power you need. When you change the eyepiece, you need to adjust the focus.
C. Don’t be bothered by the upside-down and left-right images you see, which is a normal situation for astronomical telescopes.
4. Instructions for Effective Observation
If the telescope is placed outdoors in air with a lower temperature than indoors for the first time, it will take a few minutes before using it It—because the temperature difference will fog the lens. This phenomenon will disappear after 15-20 minutes. If your eyelids or fingers touch the eyepieces, wipe them gently with a lint-free cloth to prevent blurred images. It takes about 30 minutes for your pupils to dilate to adjust to the darkness, so using a telescope at night will allow you to see much darker objects after half an hour.
5. Various factors that may affect the observation results
The quality of the observation results is not entirely determined by the optical performance of the telescope, there are many factors that also affect depends on the image quality.
A. The atmosphere surrounding the earth is always in motion. The movement and rotation of this atmosphere will cause bad images especially at high magnifications. Maybe after a few nights, the observation will improve .
B. The hot air on the earth’s surface will also cause air fluctuations to distort and deform the image, resulting in poor observation.
C. The observation angle formed by the telescope, the star and the horizon has a great influence on the observation effect: if the measured star is close to the horizon, the target will be blurred.
D. Light source pollution: try to use your telescope in a dark environment (for example: street lights, room lights, etc.), high-power astronomical telescopes are very sensitive to light, in Closer to the urban area, the effect of the bright light is more pronounced, and it seems that many stars will disappear in the sky close to the urban area.
E. Moonlight can also be another factor affecting observations, a dazzling full moon or bright moonlight can obscur nearby stars or planets, and the moon itself is best between dark and dawn observation status.
F. Try to avoid observing from an open window (not to be able to observe through a closed window), especially in the cold season, the large temperature difference between indoor and outdoor will make the observation quality the worst.
G. Clouds accumulated in the sky cannot penetrate through observation, but this cloud will often move.
H, the star flashes are caused by the convection of the air, which also affects the observation.
Remember, under no circumstances should you look directly at the sun through the finderscope or primary tube, as this could seriously damage your eyes.