(October 22, 2010 at 7:34 am)leo-rcc Wrote:(October 22, 2010 at 3:38 am)orogenicman Wrote:Messier 27, The Dumbbell Nebula, in the constellation Vulpecula
Awesome. With long exposure do you have something to compensate for the rotation of the Earth?
Yes. The mount is a Losmandy G-11 with Gemini Go To. What that means is that it is an equatorial mount with a digital clock drive. The clock drive compensates for the Earth's rotation. "Go To" is a computer built into the system that allows me to slew to any of some 42,000 objects that are in the computer catalogue. I can also type in the coordinates of any object (such as the comet I took a picture of earlier this month), and the computer will slew the scope to the designated coordinates. To take deep sky astro photographs, I have to be anble to track a deep sky object with high precision. The autoguider allows me to do that automatically instead of the old fashion way of making small changes manually using a reticulated eyepiece. It saves a lot of previously sore neck nights.
'The difference between a Miracle and a Fact is exactly the difference between a mermaid and seal. It could not be expressed better.'
-- Samuel "Mark Twain" Clemens
"I think that in the discussion of natural problems we ought to begin not with the scriptures, but with experiments, demonstrations, and observations".
- Galileo Galilei (1564-1642)
"In short, Meyer has shown that his first disastrous book was not a fluke: he is capable of going into any field in which he has no training or research experience and botching it just as badly as he did molecular biology. As I've written before, if you are a complete amateur and don't understand a subject, don't demonstrate the Dunning-Kruger effect by writing a book about it and proving your ignorance to everyone else! "
- Dr. Donald Prothero
-- Samuel "Mark Twain" Clemens
"I think that in the discussion of natural problems we ought to begin not with the scriptures, but with experiments, demonstrations, and observations".
- Galileo Galilei (1564-1642)
"In short, Meyer has shown that his first disastrous book was not a fluke: he is capable of going into any field in which he has no training or research experience and botching it just as badly as he did molecular biology. As I've written before, if you are a complete amateur and don't understand a subject, don't demonstrate the Dunning-Kruger effect by writing a book about it and proving your ignorance to everyone else! "
- Dr. Donald Prothero