由 willis » 2012-06-30, 16:12
From physics point of view, given the relative humidity at a certain temperature, there exist temperatures called dew point below which water will condense. So in Hong Kong or southern part of China, humid area, using cooled DSLR is inevitable to have condensation. It is not the problem of the cooled DSLR, but a physical phenomenon. The situation is similar to getting a can of cold Coke from the fridge, and there is condensation on the surface of the can. This is natural and not the problem of the cold Coke or the problem of the fridge. Maybe don't disconnect the camera & the telescope during imaging, so that less relatively warm air to get contact with the CMOS. If the defrost parts is added, this is another technical issue.
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10