Friday, February 15, 2008
Second light for Canon FD 200mm f2,8 lens
Rosette nebula is located very low in the horizont at my location.
The maximum elevation is about 29 degree.
Last night I shooted one hour of exposures to RGB channels, with UHC-s
filter 6x600s.
Hevay light pollution coused strong gradient and very weak signal/noise.
Then I shooted 9x1200s for H-alpha channel, but thin upper clouds ruined 5 exposures.
Final image is composed from 6x600s RGB and 4x1200s H-alpha.
This lens is fast enough to capture a nice amount of photons in that time,
not very deeb image but tolerable.
Here is pure H-alpha version:
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1 comment:
Visiting your blog for the first time. You have nice pictures.
-KuuMaaKalle, Kuusamo
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