Do having a plan to enlong the exposure time? Like 30s to 2hr for GF2/GF3. Thanks!
I asked to use either
http://www.personal-view.com/talks/discussion/3382/enlong-the-exposure-time
or
http://www.personal-view.com/talks/discussion/2667/ghxgxgfxgxx-questions-and-suggestions#Item_17
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