Laurentiu,which is standing for Lawrence in Romanian language,is an amateur astronomer and ATM-er living in Timisoara. He built his first telescope in 2003. This was an 8 inch F/6 Dobsonian with main and secondary mirrors from Orion Telescopes in USA. The optical set being bought and carried to Romania by Alin Tolea. Altough moved to USA long time ago ,Alin ,an avid amateur astronomer himself,did not forget felow amateur astronomers from Romania and is helping us in many ways.
The first incarnation of the 8 inch F/6 Newtonian telescope,named ''Darkmatter'', used a PVC main tube and a playwood Dobsonian mounting.
Note the fan for cooling the main mirror, the handles,the eyepiece shelf and the Herschelian position of the focuser.
The telescope had an 11x50mm finder built by Laurentiu from pieces recovered from a scrap binocular.
But this telescope was too heavy. The complete optical tube alone weighted 20 kilograms (44 pounds) due to the tick PVC tube , the square tube box and altitude trunions.
Laurentiu decided to rebuild his telescope using stainless-steel sheet for the tube ,wich now weight ,completly equiped, 10 kilograms,an important weight reduction for convenience in handling,transportation to dark sites and for faster reaching of thermal equilibrium .
The ''optick tube'' was entirely rebuilt. Because it become obvious the telescope cannot be used from the ''orange'' downtown of Timisoara ,the new tube was made shorter.
And components was not just moved from one tube to another tube,the OTA was entirely rebuilt.
Let see some more picks.
The new main mirror cell ,home-made of Aluminium,showed face down .
When the picture was made ,wood spacers was used instead of the springs between the T cell and the three L brackets going to be bolted to the main tube.
Note the flotation mirror suport made of the three rectangular levers.
The new secondary mirror suport,the spider being made of Aluminium and wood.
0 comentarii:
Trimiteţi un comentariu