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Canon DSLR Challenge | all galleries >> Challenge 62: Low light or low key (hosts: Victor Engel & Olaf.dk) >> Eligible > The Great Orion Nebula *
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06-MAR-2006 brettpm

The Great Orion Nebula *

far, far away...

Canon EOS 350D ,Meade LX200GPS 203mm f/6.3
30s iso1600 hide exif
Full EXIF Info
Date/Time06-Mar-2006 20:46:01
MakeCanon
ModelCanon EOS 350D DIGITAL
Flash UsedNo
Focal Length
Exposure Time30.00 sec
Aperture
ISO Equivalent1600
Exposure Bias
White Balance (-1)
Metering Modematrix (5)
JPEG Quality (6)
Exposure Programprogram (1)
Focus Distance

other sizes: small medium original auto
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Canon DSLR Challenge08-Mar-2006 01:47
Completely forgot your question!
No, this is not inherent in my telescope, i have taken shots of the moon that are sharp right across the field of view with no distortion. I just need more practise with longer exposure shots.
brettpm
Canon DSLR Challenge08-Mar-2006 01:43
Victor, I am not sure exactly but know that there are many factors that can cause the edges of telescope photos to become blurred or unfocussed. I haven't gone to great lengths to correct any of these as i am still very new to astrophotography and am just playing at the moment.
I'll need to polar mount my telescope to prevent slight image distortion as the telescope tracks objects across the sky (and doesn't take into account my latitude), and ill have to train the drives to correct any small errors (or bumps) that may be present in the cogs that could 'nudge' the image off track for a few miliseconds and 'smudge' the images.
Then i suppose i am going to have to manually guide the photos in future to make sure the scope stays exactly on target to prevent these problems further.

Then of course when i've corrected all these problems a few more will pop up and i'll have even more work to do and more importantly more dollars to spend to correct it!!!
SLR's and lenses can be expensive but i when you start hooking them up to fancy telescopes the cost of your images goes through the roof! But it is fun and challenging and most of all rewarding when you get a better image than before so i'll continue on.
brettpm
Canon DSLR Challenge07-Mar-2006 18:48
Can you explain why the stars at upper left appear to be more out of focus than the rest? Is this distortion inherent to your telescope? -- Victor