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06-12-2011, 07:23 PM   #46
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QuoteOriginally posted by Gimbal Quote
Or wait a month and see how well/bad the new O-GPS1 and a normal tripod works.
It really depends on what is trying to be done with astrophotography. If your taking pictures of a small section and stacking a dozen exposures then I would think a tracking mount would be much better then the O-GPS1. if your going for a 1shot long exposure of the night sky/milky way ect then the O-GPS1 is for you. Now I suppose you could stack with the O-GPS1 IF, and only IF the sensor doesn't reset to its original position between shots/ AND continues to track the sky between shots. Then if permitting with focal length and time in between shots then yes you might be able to squeeze in 3 - 30s shots or something.

Don't get me wrong, I'm really interested in the O-GPS1, and am very interested in purchasing the product. Just wish Pentax would release some sample images for a product that is out in less then a month. Another interesting question would be is the O-GPS1 is familiar with its location and adjusts the sensor accordingly, can it continue doing so if the camera is moved slightly during exposure ie on a tracking mount. Or would that be like having a lens SR on while having a body SR on as well, and cause more problems then fixing.

06-12-2011, 07:27 PM   #47
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I will wait. I will buy an O-GPS1. I will use the astrotracer feature. I will take pictures. I will delete them because they will probably be terrible. Then I will try again.
06-13-2011, 12:15 AM   #48
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QuoteOriginally posted by Dr_who Quote
Now I suppose you could stack with the O-GPS1 IF, and only IF the sensor doesn't reset to its original position between shots/ AND continues to track the sky between shots. Then if permitting with focal length and time in between shots then yes you might be able to squeeze in 3 - 30s shots or something.

It will reset to it's original position between shoots, it has to. But that shouldn't stop you from stacking. The sensor can only move/track a short distance for each shoot, that means that it will take quite a number of shoots before a target has moved out of the picture. ( you will have to do some cropping of course).

But a real motorized mount will of course do better.
06-13-2011, 02:44 PM   #49
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They have some samples taken by astrotracer in their japanese site.
??????????GPS UNIT O-GPS1?PENTAX

Japanese English
----------------------------------------------------------------------
固定撮影 No astrotracer
アストロトレーサー使用による撮影 With astrotracer
撮影機材 Camera
秒 Seconds

06-14-2011, 12:32 AM   #50
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QuoteOriginally posted by secondliner Quote
They have some samples taken by astrotracer in their japanese site.
??????????GPS UNIT O-GPS1?PENTAX

Japanese English
----------------------------------------------------------------------
固定撮影 No astrotracer
アストロトレーサー使用による撮影 With astrotracer
撮影機材 Camera
秒 Seconds

Might be partly the exposures, but that's a lot of light pollution Anyhow looks cool, and reaffirmed my idea that if you have any horizon that a stack with the ground and a stack with the sky would be best as it'll be the one streaking instead of the stars.
07-12-2011, 03:10 AM   #51
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... Pentax K-5 iso 80 AstroPhotography !

.

first pictures, May 2011

* iso 80, 3 PEF = 12 minutes each :



.

* iso 80, 5 PEF = 12 minutes each :



.

* iso 80, 3 PEF = 10 minutes each :



.

* other pictures here :

Pentax-Full-Frame-Soon

07-12-2011, 03:14 AM - 1 Like   #52
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... Pentax K-5 iso 80 AstroPhotography !

.

last pictures July 2011

* iso 80, 4 PEF = 12 minutes each :



.

* iso 80, 5 PEF = 12 minutes each :



.

* iso 80, 4 PEF = 12 minutes each :



.

- No Dark Frames subtracted !

- No Bias Maps (Offset Frames) subtracted !

http://en.astronomike.net/m/134251.html

07-12-2011, 03:43 AM   #53
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Beautiful series, The skywatcher refractor i assume. 120 ED apo? Boy stacking these really does a nice job. And noise is not bad.

07-12-2011, 05:09 AM   #54
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QuoteOriginally posted by geo444 Quote
.
last pictures July 2011
Amazing!
07-12-2011, 09:09 AM   #55
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Nice, very nice images.

So, would you recommend k5 for astrophoto? There is some drawbacks relative to canon cameras (which are widely used in this field)?
12-06-2011, 12:49 PM   #56
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... Pentax K-5 iso 80 AstroPhotography !

QuoteOriginally posted by garyk Quote
Beautiful series,
The skywatcher refractor i assume. 120 ED apo?
Boy stacking these really does a nice job. And noise is not bad.
Thanks !
1st picture on this page is from a Vixen Na 120/800 refractor
five other pictures are from a SkyWatcher 254/1200 réflector

Pentax-Full-Frame-Soon
12-06-2011, 12:53 PM   #57
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... Pentax K-5 iso 80 AstroPhotography !

QuoteOriginally posted by Class A Quote
Amazing!
thanks a lot !
12-06-2011, 01:07 PM   #58
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Dear Pentax and Astro Fans,

As my contribution I would like to refer to my recently posted thread

https://www.pentaxforums.com/forums/pentax-k-5-forum/167500-k5-o-gps1-astroph...s-namibia.html


Cheers from cloudy Berlin,

jephi
12-06-2011, 01:13 PM   #59
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... Pentax K-5 iso 80 AstroPhotography !

QuoteOriginally posted by valy Quote
Nice, very nice images.
So, would you recommend k5 for astrophoto?
There is some drawbacks relative to canon cameras (which are widely used in this field)?
thanks, yes I would recommend it for astrophoto !
results at iso 80 are simply amazing... but you need guiding (I use PHD)
the drawbacks are :
- lack of any "Pentax Remote & Capture"... but some third party softwares
for now, I use the Pentax O-RC1 remote control
- not many ways to remove the IR-cut filter and replace it by Astro-filters !
my K-5 as my Eos remains unmodified for the moment !

Pentax-Full-Frame-Soon

http://en.astronomike.net/m/6809.html


Last edited by geo444; 12-06-2011 at 01:27 PM.
12-06-2011, 01:30 PM   #60
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QuoteOriginally posted by geo444 Quote
.

[U]last pictures July 2011
Were you using the Pentax GPS Astrotracer for that or an equatorial mount?
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