Anyone using a terrestrial or astronomical telescope uses it to enlarge, ie virtually bring an object that is at a great distance, to observe it in minute detail as possible to their own observation instrument. A telescope is capable of receiving the parallel light rays that originate from the object under observation is, to form a
With reference to the previous article that dealt with the construction of this instrument; So as not to lose the habit to DIY, but above all in order to get rid of the stool needed to reach the eyepiece of the telescope that was in 1,8 meters above the ground. I lowered the same 16 cm, bringing it to much
300F6 “LIGHT”: Mission (equilibration) impossible?….A solution is to equip it with a disc brake! From years, in his beautiful box taped ZAOT (the brand of my favorite aluminizer) I had that mirror Ø305 F 1830 unused. I had bought it for a short time before because it was "gray", i.e. with a good parabolic surface, but happened “among head and neck" (like we say in Italy meaning "by surpise")”, to a “mirror
In support of the fact that the balance of light Dobsonian (and not), It can be done dynamically as an alternative to the use of counterweights, I do narrate here my recent experience to rebalance with elastic rubber my Dob250F5, After adding optical finder 6×30 weight of 265g. In order to fully understand what the physical principles and
My Carry a positive experiment in practical balancing the telescope Dobson, with the use of tension springs in replacement of heavy counterweights. A Dobson telescope behaves in practice as a first class lever, that is, as a classic balance with two arms and central hub: The arm, We are saying A (see figure); It goes from the cell of the
