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Thereof, how do you store a reflector telescope?
A good storage place should be dry, dust-free, secure, and large enough to get the telescope in and out easily. Ideally, you should keep your telescope at or near the temperature outside. Doing so reduces the cooling (or warming) time required when you set up at night.
Secondly, can you use a telescope indoors? Pointing the telescope through a window from inside the house will never yield a decent image – the glass in the window is nowhere close to optical quality and will distort the image terribly. It's important to let your telescope cool down so it's the same temperature as the outside air.
Subsequently, one may also ask, is it OK to leave telescope outside?
Do not leave your telescope outside. Even if it doesn't rain, moisture from morning dew or fog can damage the optics – even if you put the dust caps on. Even covering the telescope will not fully protect it (although some specialized telescope covers do come close).
Can I store my telescope in the garage?
Store your telescope in a place which is dry and has a constant temperature. This should be room temperature so within your home is best – in a spare room or your bedroom. Garages and lofts are possible locations, but it depends on their temperature ranges and other conditions.