金星 ALPO-Japan Latest
Venus Image 2010/05/22(UT)
Emil Kraaikamp
E.Kraaikamp
Emil Kraaikamp(254mm Newton) |
2010/05/22 18:34 UTC
254mm F/4.5 Newtonian
DMK21AU04 with ICX618ALA modification
Astronomik RGB and >742nm IR-pass filter
Powermate 5x
Comments:
Interestingly, the contrast in green and red is not all that different from
the IR recordings. Again I'd like to stress out the importance of capturing
with noise when using an 8-bit camera. You NEED the noise to end up with a
stack that has more than 8-bit in data. The sweet spot for my modified DMK21
seems to be at a gain of about 700. If I had recorded at a low gain, all
these details would be lost.
[Emil Kraaikamp:Neighbourhood of Ruinerwold]