Quote:
Originally Posted by niko
Luigi,
Interested to know more about your Astrotrac experience. What did you pay for it? What's the length of exposures you can get? Would you recommend it? They seem expensive for what they are.
cheers
niko
|
I paid around U$S 500 something, can't recall the exact number. Shipped by DHL international arrived quickly and safe to Argentina.
With very very rough alignment using just a compass and setting the declination I could get around 30 seconds at 200mm or around 2 minutes at 14mm. I'm positive you can expose for up to 5 minutes with proper alignment without any trails.
Some days my alignment is better than others. The Gods of astronomy gave us the Milky way, Eta and the Magellan Clouds but no polar star. Ok Ok...
With my 14mm I used to use 15'' or 20'' exposures before the stars near the celestial equator showed trails, now with the AT I can go up to 1 minute and stars are perfectly round.
I'd highly recommend it to a photographer because of what you get and portability.
This is an example I did with the Astrotrac, not sure if it's similar or not to what you plan to do.
http://www.luisargerich.com/night/haf83126#haf83126