One of the most common challenges experienced by many telescope users is seeing blurred images. Your telescope can appear blurry due to several reasons, including :

1. Too high magnification 
Too high a magnification is the leading cause of most telescope images being too blurry to be classified accurately.

Any magnification above 200X may make images unclear in certain atmospheric conditions. The magnification on a humid summer night will not be the same as during a winter night.

2. Environmental factors
The quality of images observed in the telescope is mostly affected by environmental factors.

The most common environmental factors known to cause blurred vision in telescopes include temperature and turbulence, warm ground, and moonlight.

3. Collimation is out
Blurry vision caused by collimation misalignment is a common problem more significantly in the Cassegrain and reflector telescopes.

The collimation problem is easy to fix, but it can be challenging if it’s the first time you are dealing with it.

To deal with this problem, you should always assume that collimation is off before using your telescope. You can also check it from time to time.
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