PART FOUR AND LAST: NOTE: Clicking on the images You gets his magnification, often helpful to appreciate the details that are in practice the object of this work. Today is the 7 March 2009 START I start polishing the amateur work abandoned 4 February for "paid" business reasons . Resume in hand then the mirror whose
The precautions needed to be taken in the nights of stargazing are notoriously two: The shield of any stray light that could be inserted in the optical observation path, The isolation of the inside of the telescope than the outside air currents that would promote the formation of dew condensation on the primary and secondary mirrors. There is also a third trick,
Before starting any mirror processing phase, it is essential to make sure that the edges of both mirror that tool are blunted. This precaution is essential to minimize, during processing, the risk that by the sharp edge of one of the two discs coming off a flake that can slip between the two
Support for the mirror, necessary for the proper positioning of the same during another test is not that any device able to keep it in a safe and in a vertical position. The support can be seen as the assembly of 5 distinct elements: Panel or carrier rear structure lower supports for the support of the
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
Micro travel Dobson 130 F7 size "A4" ( year 2008 )
The obvious question that arises is: “What's is the point..or the "sense"” to build a micro dobson like this? The sense is just that… That such a small instrument and light and without a tripod, allows you to observe when walking up hill or mountains, or on other occasions, when You can't take anything bulky as a classic little telescope
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