Originally posted by duncan1 I experimented with the AC power supply and long exposures on my K10D; IIRC, there was a considerable increase in noise when using the adapter. At the time my thinking was that some of the amps and circuits that were shut off to save power in battery only mode were being left on, when the adapter was connected. I wonder if anyone can confirm this?
My planned work around was to use the battery grip and then if more power was needed, I would try and wire a DC power source directly to the leads in the grip. However, I can confirm that the K10D has an internal battery life of better than two hours, when shooting long exposures in bulb mode.
This is not something I've heard before now. I'll check it with my setup.
I have an extensive library of darks to compare against. I'll do some testing and see what I get. When I would use the battery grip on mine there was an annoying habit of the camera dying in mid-shot because it failed to switch batteries.
When I was doing this via battery, I would get 4-6 hours at 20C. My batteries have aged quite a bit now so this may not be as reliable.
Here's my most recent effort. It's not complete yet.
Witch Head Nebula (IC 2118) is a reflection nebula near Rigel.
This is from 24 subs of 1200 seconds long at 100 ISO over two nights with my K10D. Camera cooled to 0-4C. Taken at a nearby dark site.
I want to get back there for another two nights of data if possible this coming week.