It will not overheat, I think, but you will get a lot of hot pixels due to the long timing... Which makes it a pain in the arse to edit.
Most people these days stack 30 second exposures because well, it's just more noise-free.
There are many many programs you can use, one is ImageStacker: Image Stacker
You can read another here: How To: Star trails – Stacking with StarTrails.exe
That last one has a link to another star trails program from this site: www.Startrails.de-Home
You can see a youtube video here: Night Photography: Stacking Technique For Star Trails - TMELive.com - YouTube
There is actually a lot a lot a lot of information on the net on stacking star trails, if you want to read more, just google "Stacking Star Trails", I'm sure you'd have no trouble finding something you like.
Thanks, yes, there is alot of info on stacking. I was hoping to avoid it and do along exposure though... kinda lazy... but if i am on a trip with one camera then i better not risk it.
Heh! Yeah there is that too... yeah sounds like stacking is the only choice... Thanks!Battery might also not last that long...
PK_Tether | Tethering and remote control software for Pentax DSLR cameras
you don't need to buy any extra if you have a 10-hour battery life netbook. (300 sgd in IT show now)
plug the usb come with kx into pc, use this software to set the interval time,
and the software will help you save the image directly into pc harddrive as well.
I tried with software for a indoor still flash photography studio shoot, you control everything in your pc, when the camera is connected
Have been searching but haven't found a solution yet. Looks like what i need is something like the Phottix Nikos. Red Dot's website doesn't seem to sell one for K-x. As Pentax K-x is IR only, i can't seem to find a third party IR intervalometer that is compatible for K-x. Can anyone point me in the right direction?
Can't speak for the K-x, but I've tried a 30+min exposure at ISO100 for star trails with the K-5 before, and it didn't turn out too bad. The noise was perfectly acceptable for me, maybe comparable to what you'd expect at roughly ISO400-800.
But I think stacking does give an additional degree of freedom, thinking of trying it next time.
Thanks for the info. Yeah might try to stack cos it seems like the safer thing to do. Btw when you did a 30min exposure, how long were your star trials?
Oh you travel to some amazing places by the looks of your pics!