AD
05-03-2009, 12:15 AM
Hi guys,
We had clear skies last night in Manawatu, NZ, so took the opportunity to try some shots of the comet before the clouds rolled in again. I don't own a scope but have an AstroTrac and tried a couple of camera/lens configurations.
The image of the comet & M67 was on a Canon 5D, 135mm lens at f/2.2, 60 seconds, ISO 3200. Cropped slightly, no noise reduction.
The closer view was a Canon 30D with Tokina 300mm lens at f4, 130 secs at ISO 1600. No noise reduction.
Both had auto-contrast applied.
I'm not that skilled with the post-processing yet. I did shoot three-four frames (2 mins each) & a dark frame intending to try stacking them, but I see the comet does visibly move. I guess there might be some tricks to that. I can't track the comet with my gear so maybe I've just reached the limit there, or maybe I should use shorter exposures.
Andrew
We had clear skies last night in Manawatu, NZ, so took the opportunity to try some shots of the comet before the clouds rolled in again. I don't own a scope but have an AstroTrac and tried a couple of camera/lens configurations.
The image of the comet & M67 was on a Canon 5D, 135mm lens at f/2.2, 60 seconds, ISO 3200. Cropped slightly, no noise reduction.
The closer view was a Canon 30D with Tokina 300mm lens at f4, 130 secs at ISO 1600. No noise reduction.
Both had auto-contrast applied.
I'm not that skilled with the post-processing yet. I did shoot three-four frames (2 mins each) & a dark frame intending to try stacking them, but I see the comet does visibly move. I guess there might be some tricks to that. I can't track the comet with my gear so maybe I've just reached the limit there, or maybe I should use shorter exposures.
Andrew