Coolpix P1000 for astronomy ... beware !

Started Nov 4, 2018 | Discussions thread
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Sylvain Weiller
Sylvain Weiller Regular Member • Posts: 335
Coolpix P1000 for astronomy ... beware !

Yesterday night I started shooting Orion M42 again as the wind was very light.

I expected to get many good RAWs.

Good point : I used for the first time the Nikon remote just delivered ... this enables me to avoid going to the mount to start a new picture (1 min Time exposure). I can be inside surfing on Internet and just looking at the clock ! As soon as 2 min have gone, I just click on the remote ! It is as simple as that !

But beware ! The Coolpix P1000 is like a telescope and it was near 4 AM (!) when I realized whetransfering the files to my PC, that almost all the pictures, except the first ones, were out of focus and only good for the trash can

As a long time astronomer, often using refractors, I understood right-away what had happened ... At the beginning of the session, at around midnight, I took the P1000 from its bag in my room, I installed it and started focusing and taking pictures. But the external temperature was rather cold and the P1000 cooled in a matter of a few minutes and its tube got shorter and shorter !!!

I hope reading this, the same thing will not happen to you !

Tonight the P1000 is outside for now a long while and the focus keeps perfect !

Starting session T0

T 0 + 10 min

T 0 + 28 min Defocus is maximum and thereafter stay like this (P1000 is now cooled !)

Nikon Coolpix P1000
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