2013年1月15日(火曜日)

IC405 The Flaming Star Nebula まがたま星雲

カテゴリー: - nobuo @ 18時11分31秒


Emission/Reflection Nebula, being bombarded by the UV light by AE Aurigae, the brightest star in this photo. AE Aurigae was originated near or at the Orion M42 and is passing now through IC405. Refer to:
Wikipedia IC405
for detail.
1/14 and 15th 2013 from Sunnyvale, CA USA
Same Vixen VC200L scope and EOS Rebel T3 (1100D or Kiss X50)
33 light frames at ISO 3200 and 90 seconds Exposure, 20 flats and 20 dark.
The dark noise (red noise) of T3 is less than half of the noises of XSI(Kiss X2) and T1i(Kiss X3).
This is very impressive improvement. It appears Canon had a mini break-through in reducing the defects mainly on the interface of oxides and Silicon of their CMOS.
The following is one of the original unprocessed frames. Note that in EOS T3, two filters, one for low pass and another for IR/UV cutoff, are in a single frame. When the IR/UV filter is cut out, a great care needs to be taken not to contaminate the surface of the low pass filter or it needs to be cleaned. Currently the back surface of the low pass filter is very dusty, needing multiple shifts in the framing while shooting.


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