Early December last year, I contemplated buying a HyperStar for my Cat.
I made certain that it was compatible by looking in the obvious place. The secondary mirror gets replaced by the HyperStar. There ought to be some indication there, right?
Check. It says "fastar compatible" right in front of the cover that hides the collimation screws. Fastar is Celestron's predecessor to the HyperStar, now manufactured by Starizona.
I took this photo early December. See the reflection of the Christmas tree lights on the corrector plate?
I placed the order and then waited weeks for it to arrive. The clouds didn't actually arrive until the HyperStar did, getting my hopes up for an easily had first light!
Here is the HyperStar, fresh out of the box.
Installed on the corrector plate. This required removing the secondary mirror, disconcertingly exposing a big gaping hole until the HyperStar was rotated into place.
With the ZWO ASI294MC imager installed, the HyperStar is heavy, requiring a weight on the other end of the Cat to keep things balanced.
The weight is inserted into the one and a quarter inch eyepiece interface on the visual back. Pretty scary, huh? It is very sturdy, though.
Note that in this configuration, this is no such thing as "visual astronomy." Putting the HyperStar on the Cat is making a commitment to use the imager for the duration!
This weekend was the first opportunity of this year to bring the Cat out and use the HyperStar under a clear, moonless sky with good transparency.
It was an opportunity to experience the wide field view that the HyperStar brings to the Cat. The field of view with the combination of the ZWO ASI294MC and the HyperStar on my CPC-1100 is 2.04 x 1.39 degrees! The HyperStar brings the focal ratio or "speed" of the Cat from an F/10 to an F/2!
It was cold and windy, but a star party was had anyway.
The following images are highlights from the observing session. Each of these images are the results of live stacking using SharpCap. Not astrophotography quality, but only required a few minutes of integration time . . . Click to make bigger.
I always take a peek at these two. To be able to see them requires the sky to have good transparency and this lets me temper my expectations for the night.
|The Horsehead and Flame nebulas|
The constellation Leo, has a number of delights to see. Here is the Leo triplet, also known as the M66 Group. It consists of M65, M66, and NGC3628.
|The Leo Triplet|
Really, no kidding, this is an image of Mars through the HyperStar, many months after opposition! It's a little tiny red-orange dot.