Jupiter-Lightbridge 16 Canon T2i
Started by
jgraham
, Feb 06 2013 10:55 PM
5 replies to this topic
#1
Posted 06 February 2013 - 10:55 PM
Date & Time: 2/7/2013 1h 30m UT
Telescope: Meade Lightbridge 16, 2” 2x Barlow (f/9)
Camera: Canon Rebel T2i, remote switch cable
Adapters: EOS to T-thread, T-thread to 1.25” nose piece
Filter: None
Exposure: 4x1/250sec, ISO 1600 saved as RAW
Mirror lock-up: On, 5 second pause to allow vibrations to settle
Software: Digital Photo Professional, Photoshop Elements 6
The seeing wasn’t supposed to be very good this evening, but Jupiter looked pretty good so I decided to try grabbing a set of images with my T2i. I set the focus using a Bahtinov mask while looking through the viewfinder at Aldeberan and then swung over to Jupiter. I placed the planet so that it was just off center and timed it so that it would be near the center when I took a single image. This proved to be pretty easy and I took a total of 15 still frames, but for this image I only used the first 4. I used Digital Photo Professional to convert the RAW images to TIFFs that Photoshop Elements 6 could read. I loaded the four source images into PSE, converted them to 8 bit, copied them onto 3 layers over the first image and aligned them manually. I then set the blending mode to normal, the opacity of the three layers to 50%, 33%, and 25%, and flattened the image. This was rotated, cropped, and mildly sharpened. For a simple test I was really pleased at how well this turned out. Note Ganymede to the left and Io to the right.
Telescope: Meade Lightbridge 16, 2” 2x Barlow (f/9)
Camera: Canon Rebel T2i, remote switch cable
Adapters: EOS to T-thread, T-thread to 1.25” nose piece
Filter: None
Exposure: 4x1/250sec, ISO 1600 saved as RAW
Mirror lock-up: On, 5 second pause to allow vibrations to settle
Software: Digital Photo Professional, Photoshop Elements 6
The seeing wasn’t supposed to be very good this evening, but Jupiter looked pretty good so I decided to try grabbing a set of images with my T2i. I set the focus using a Bahtinov mask while looking through the viewfinder at Aldeberan and then swung over to Jupiter. I placed the planet so that it was just off center and timed it so that it would be near the center when I took a single image. This proved to be pretty easy and I took a total of 15 still frames, but for this image I only used the first 4. I used Digital Photo Professional to convert the RAW images to TIFFs that Photoshop Elements 6 could read. I loaded the four source images into PSE, converted them to 8 bit, copied them onto 3 layers over the first image and aligned them manually. I then set the blending mode to normal, the opacity of the three layers to 50%, 33%, and 25%, and flattened the image. This was rotated, cropped, and mildly sharpened. For a simple test I was really pleased at how well this turned out. Note Ganymede to the left and Io to the right.
#2
Posted 06 February 2013 - 11:38 PM
I can tell this photo is a little over exposed, you should be able to bring the ISO down which will give you a bit more dynamic range and less noise, as well as making your exposure a little more correct. Also, try using registax and you would be surprised how much more detail you can get after using wavelets. Other than this, it's a great shot. Just my .02.
Also, less exposure will make it so you can't see the moons. In this case, you could use 2 images, and composite them together in photoshop, which will make it show the moons as well as the correctly exposed jupiter!
Clear skies.
Also, less exposure will make it so you can't see the moons. In this case, you could use 2 images, and composite them together in photoshop, which will make it show the moons as well as the correctly exposed jupiter!
Clear skies.
#3
Posted 07 February 2013 - 12:01 AM
Actually I tried Registax, which is why I took 15 source images. However, I've never been able to get Registax to work with full-frame DSLR images. We're already back under clouds, so I'll be working with the source images for a bit yet. I agree about the exposure, I'll tinker a bit to find the right mix of gain and exposure time. It has been a long time since I've done any undriven imaging. I think the last time I did something like this it was on Tri-X!
#4
Posted 07 February 2013 - 05:06 PM
Anyway not bad at all
#5
Posted 07 February 2013 - 08:47 PM
Very nice picture !
#6
Posted 07 February 2013 - 09:06 PM
I like it a lot!! What a great idea, I never thought to try planets at a fast shutter like that.