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  1. #21
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    Quote Originally Posted by DaveW View Post
    Sorry to dredge up this old post, but I have a question. :P

    Al, does your polar scope have a fish-eye effect in order to center in on the NCP while still showing Cas and UMa as a reference? Or do you just line Polaris up towards the circle and not actually in it?
    No, you can't see the constellations in your polar scope. You just line them up by eye. This is, of course, not perfect, but should be pretty close.

    I assume that those seeking absolute perfection would do a drift alignment next.
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    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  3. #22
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    Ok, that makes a lot more sense, and explains why Polaris is between the NCP and the Big Dipper instead of between the NCP and Cas. I should have read Al's post better, since he explains it.
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    There is a 7th magnitude star, HIP 7283, about half a degree from Polaris. If there was another circle for that star in the reticule, almost perfect alignment could be achieved without drift alignment.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5; Orion 127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  5. #24
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    I was thinking almost the same thing earlier today Pierre, though I was thinking of using it with lambda UMi to separate them a little further. Even with the small aperture of a polar scope that should be visible from light polluted skies. The problem would probably be that to get it really accurate you would want the two stars to be as far apart in the FOV as possible, and if you increased the mag the initial alignment would be more difficult. Still, it would be better than nothing. Even if you only got it within an arcminute, that should be close enough provided you're not taking really long exposures.
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