View single post by amazing50
 Posted: Sat Dec 19th, 2015 11:24
amazing50

 

Joined: Thu Apr 12th, 2012
Location: Kitchener, Ontario Canada
Posts: 571
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Robert Wrote:
JK, do you know how Nikon cameras cope with 'bulb' exposures of greater than one hour?

My understanding is that digital cameras in general, limit 'bulb' exposure to 60 minutes, yet that remote you quote offers 99 hours, 59 minutes and 59 seconds...

My lack of understanding of this is one reason I haven't yet attempted to make an 8 hour star trail image.




Long exposures build up noise, astro cameras have various cooling devices to reduce noise on long exposures like liquid nitrogen.

There are programs to combine time lapse sequences into a nice trail pix on the astronomy sites.

Sony has an App fro the R7xxx cameras that builds up movement of point light sources.



____________________
There is nothing worse than a sharp image of a fuzzy concept ;~) Mike Grace