souldeep
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Long exposures with noise reduction will double the exposure time like you say. 30s exposure + 30 sec NR and the dotted line effect will be seen as between each shot you are leaving a similar time gap.
Better to have lots of shorter exposures with no noise reduction.
Also, with NR turned of, the sensor is going to start getting hot after a few long exposures and that in itself will introduce noise.
Its all a bit of trial and error.
I dont have any images that might show these effects, all my astro shots were taken using a computer controlled mount that followed the subjects.
Allan
Wow - computer controlled mount. Sounds like you are quite the astronomer then. Would still love to see some of your night sky examples taken with the X10 trails or not
Hmm so a choice of sensor overheating or NR causing gaps. Crazy.
Is it better to shoot shorter bursts, of say, 10 seconds then?
Also is NR reduction something that only kicks in via the auto modes or is it also on, by default, in the manual mode?

















