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Gibraltar Amateur Astronomers Society
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Gibraltar Amateur Astronomers Society

The Gibraltar Amateur Astronomers Society was created in 2013.

​It was founded with the sole purpose to learn and sharing knowledge. We are a
 group of people of all ages who are interested in the science of astronomy. While many are accomplished observers and astrophotographers, others are new to the hobby. GAAS tries to respond to all levels of interest. Various members own large telescopes with difference equipment attached to them. On the other hand, some members don't own any telescope at all, but simply enjoy observing the night sky with their unaided eyes. GAAS meets each month. The meetings are free and are open to the public
.

The society is very active with observations and astrophotography in Gibraltar and nearby Spain. 
​

A society for everyone

Stellarvue SVX130t

9/25/2020

2 Comments

 
New Scope : The Stellarvue SVX130T
The Company has currently have completed a number of 130 apo triplet objectives at better than .99 Strehl.


Air-spaced lenses that are 5" and larger are often mounted in aluminum cells. These cells expand and contract many times more than the glass. The larger the lens is, the more important it is to have it mounted in a cell with a similar coefficient of expansion (CTE). LZOS in Russia has always provided their 130 mm and larger lenses in a steel cell for this reason. Many other 127 - 130 mm refractors use simple aluminum cells which expand and contract around the glass many times more than our cells, distorting the image. Using a material that closely approximates the expansion and contraction rate of the glass is heavier and much more expensive, but it maintains the performance of the lens despite dropping temperatures.
Arrived!!
2 Comments
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