Ghosts in the Machine: the Astro-Tech AT111EDT...
Jun 13 2015 12:23 PM by jrbarnett
My NexStar 5 Journey
Jun 13 2015 11:29 AM by orion61
Review of the William Optics 102 GT
May 25 2015 12:22 PM by Perseus_m45
Review- Printing Astro photos on Metal with Bay...
Apr 16 2015 03:36 PM by ScenicCityPhoto
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My first impression is excellent. The WO Star 71 has a wide, well illuminated, flat field of view, exactly what I was looking for.
Buying your first telescope can quickly become a daunting task when faced with so many choices and unfamiliar terms. Hopefully this article simplifies the process a bit for you.
When I was 12, a friend brought a telescope catalog to school. It was from Celestron. It was the first time I'd ever heard of a Schmidt-Cassegrain. I borrowed it, kept it for a couple of weeks, read it cover to cover until I had large swaths of it memorized.
During research into retrofocally corrected refractor systems, I noted an effect during experiments with an optical bench cum telescope apparatus, that is, when the correcting flint element was removed from the train, the image recovery lenses still formed a back focus image which was smaller but seemed well corrected for colour, in fact it was a better correction than was being had with the flint lens in situ for that particular array