Finally got an off axis guider on tuesday and set it up using the moon to get both cameras parfocal. then thought i'd see if i could get it to work despite the 1/2 moon high in the sky. managed to take 2 x10 minute subs of M42 at iso200 , then darks and stacked the result in DSS with flats and biases. I was taking the picture to see how well it could track , so chose 10min subs at iso 200. The resulting picture shows the abscence of data due to only two subs and lots of light pollution due to the close proximity of the moon , but shows the off axis guiding was working quite well with the focal length of the SW ED80 , stars nice and round , and the colours quite nice with the nex5. will practice some more , then setup the guider with the C9.25.
Last edited by 5ash; 22-03-2013 at 06:44 PM.
Reason: error
Hi Gav,
I bought an Orion deluxe off axis guider , it took a bit of fiddling to set it up as the pin from the tapered screw to the pick off prism was bent . Had to replace it with a piece of rod from a pop rivet. I made an indentation to the top with a file to locate the tapered screw as it moved forward. I moved the telescope very slightly to find a star. I am using an ASI130MM camera to guide at a 1second loop with Phd. With the moon close by the field of view was very bright so I was suprised Phd was able to guide so well for so long.
Regards philip
Thanks for the additional info, I am looking to eventually purchase an OAG so I will be interested to see how you go with it and your images over the coming months.
