土產深空天體影集!
I now totally feel the significant advantage of the cooled CCD in terms of the much higher s/n ratio, and the resolution power of the B&W chips.A/45 寫:Wow, what a sight! The modded 40D + E-180ED are formidable in your hands!
The DSLR is no match with cooled CCD, and only bright objects are in reach of the DSLR. With the heavy light pollution in HK, the 16 bits data of the astronomical cooled CCD is definitely required to pull the signal out from the background.
But this is what I can do at the moment.
- universe24
- 中子星
- 文章: 1930
- 註冊時間: 週五 11 7月, 2003 20:11
- 來自: Malaysia
Yes. For S/N ratio and ultimate deepness and resolution, DSLR is no match with astronomical cooled CCD, no matter how cold the chip is. The Korean cooled EOS, I think is rather expensive. So, if ultimate performance is requested, the astronomical cooled CCD is still the choice.universe24 寫:The cooled CCD here is mean astronomical CCD camera? Although DSLR got no s/n ratio as high as cooled CCD, but its portablity is better than cooled CCD. There got a moment I am thinking of...could we request a DSLR with mono CCD/CMOS....???
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