Question for Hyperstar owners

[symesie04]

Just a quick question for you lucky Hyperstar peeps. Is Celestrons claim that its really fast enough to image a large number of popular DSO stuff without guiding or polar alignment?.

Quote:

"The key advantage of this configuration is the fast exposure time. At the f/2 focal ratio exposure times are 25 times faster than at f/10 and require only 20-30 seconds to capture many deep sky objects. Because the exposure time is so low there is no need for guiding or polar alignment"

I can barely get 20 secs out of a 35mm lens without star trails so quite how they can claim 30 sec images unguided when presumably attached to at least 1200mm or more seems a little dubious.

Can anyone confirm or dispute these claims?

[perfrej]

You will get by with tracking for that exposure time. They are not talking about a fixed tripod. Is your reference of star trails from tracking or fixed?

[Demonperformer]

Compared to imaging at f/10, they image at f/2. This means that you get the same result with exposures of 1/25 of the time [1s compared to 25s, etc]

HTH

[Ford Prefect]

IMHO it is true, I have seen some 30s Hyperstar images without any tracking that are OK, that being said the more data you get the better the resulting image.

If you haven’t done so already, check out this site

HyperStar

[perfrej]

Mine is on its way from the US in a day or two... I'll report. Not much written about them here.

/per

[BlueAstra]

I believe collimation and focus are the two critical things with these systems due to the high F/N. Also filters are not generally designed for these F/Ns, so best to check with the supplier before buying.