A battery to power the fan aspirator of "turbulent boundary layer" present on the surface of hot primary mirror of a dobsonian telescopes, it is essential for any amateur astronomer wishing to maximize the performance of its instrument. An amateur astronomer "visualist" , which therefore does not use hardware photo / digital, You do not generally need to control
For those looking for ideas to gear up realizing what it takes to lead the Foucault test, I present a gallery of images of my way to work. The environment must be a room with the temperature as constant as possible, and a length of at least a meter and a half more than twice the focal length
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
From the 2003 my car is a Ford Fiesta, on which, after lowering rear seatbacks, also I load the biggest of my home-built dobsonian, which it is a 14 "F5, manufactured following declining from note "Bible" of Kriege/berry "The Dobsonian telescope" after converting from English to metric, The weight of the lower block of my
My biggest Dobsonian is a 14 "F5 in homebuilt 2003 following the directions of the note "Bible" by Kriege / Berry "The Dobsonian telescope" with unobtainable constructive shares in the book tables, but I have inferred in relationship proportional to the diameter of the primary, with obvious transformation from Anglo-Saxon measures in metric measurements. The result was
This article is dedicated to those who like me, know how well maybe their learn star hopping, and comfortable pointing in public star partyes is, when sometimes make use of the convenient digital circles passive pointing, or possess telescopes “Go_To”, and therefore knows that, in order to maximize the pointing accuracy, needs to put Dobson telescope in perfect horizontal "air bubble" level . The operation
Past 1 / 3D c.o.c, alias the forward-backward centered race (or, all’americana: “center over center”), processing for abrasion, amplitude equal to one third of the mirror diameter, in which scratching of the glass is used to make a mirror (for example parabolic) is, with patience, UNIVERSAL WINNING WEAPON. Like the: The acquired new life
The WHAT, the reason why', the WHEN and HOW: Let's start from WHAT: The Couder mask is a technical tool of cardboard, or other stiff and Matt material, that prepended to the parabolic mirror in construction to perform on it the Foucault test, It serves to measure the radius of curvature Rdc of the various annuli
