The first thing that you have to consider is the diameter of the objective lens or the mirror is one of the things that is important to look for in a telescope. The larger that the diameter of the lenses or the mirrors then the higher will the resolution will be or its ability to separate closely the spaced objects and at the same time to gather more light from those faint astronomical objects. But they can actually cost your more. Four inches is the good size for the first telescope. It can be inconvenient to have big telescope mirror and it can be a lot more expensive too. The bigger one can work better but not shockingly so.
The magnification is not that important and it is often being hyped in the advertising claims for that of the inexpensive telescopes. When talking about astronomy, the very purpose of the telescope is to be able to collect those light that is from those faint objects and simply not to magnify it. It is between 50 and 200 power that majority of the visual observing is done or performed.
There will be useless blur that can occur when there is too much magnification that is provided. You can determine the maximum magnification just by simply multiplying the diameter of the objectives in millimeters by 2.5. On the nights that there is high atmospheric stability that is unusual, you can use the high power but make sure that you are not going to just count into it just to simply have the good result.
The next that will be considered is that the eyepieces have to be larger ‘eye relief’, which means it can represent how close you have in order to get the eye to the eyepiece in order for the observer to see clearly. Also, the eye relief can be too small that you can be able to have to bring the eyes close to the eyepiece and it can be all but impossible to be able to observe for more than a few second at a time.
Try to look for the telescope that does have a steady mounting into them since you will surely ruin your observing experience if ever that you will have shaky or that of the unstable mount that can be hard to appreciate the beauty. If you are to look for the massive mount, then most likely that it does performs better. Once you will be in doubt, try to make sure that you spend more time on scrutinizing the mount and make sure that it will be strong enough to not to move easily that can disrupt the view.