Hi,


This is a photograph I took of Auriga and what I think is Mars. I took this photograph as the constellation was at meridian and excellent viewing was available.

I used a canon G6 on a tripod set to ISO 400 and Focal length of 7.2.
I took 9 15sec lights then stacked and aligned them using Iris (Free photo editing software). I then made some adjustments to darken the background stars without losing the constellations stars, which I feel I have achieved.

Resized and finished using Photostudio 5.5

Suggestions appreciated.



Kind Regards,

Paul

Attached Images

Auriga forum quality 95.jpg (129.5 KB, 65 views)

Very nice, fairly sharp. The Canon lens is surprisingly decent at f/4 (?). Glad to see that you are making good use of IRIS.
Your camera must have been mounted on a tracking mount to get the picture to be as sharp as it is: The G6 uses a 1/1.8" CCD with 3 micron pixels, your focal length was 28.8 mm, so you plate scale was 21"/pixel. The sky motion is 15"/sec. Since you exposed for 15 seconds for each shot, you would get 15 pixel long star trails per shot without a tracking mount. But no trails are visible! How come?

hha

Beautiful Shot
Nice Work, keep it coming

Hi Hha,

Thank you for introducing me to IRIS!

Also well spotted I made an error, it was actually set at 7.2 mm.

What maths are you using to work out the plate scale? When I zoom in at 28.8 I find the maximum Tv I can use is 4 secs is this consistent with your maths?

Kind Regards,

Paul