ASTROTRACER Function for Pentax DSLRs

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rcj
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ASTROTRACER Function for Pentax DSLRs

Post by rcj »

You don't even need a tracking mount! Check this out...Pentax is offering the O-GPS1 module that has this ASTROTRACER function and does correction for star movement, in short, it tracks by utilizing in-body image stabilization to get pin-point stars.

http://www.imaging-resource.com/NEWS/1307021455.html
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orly_andico
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Post by orly_andico »

Man that's a killer feature!

"Shooting with a 200mm lens at 0° declination, the K-r can correct for an 80 second exposure, while the K-5 allows a 110 second correction."

Suddenly I regret jumping from the Pentax (now Ricoh) ship.
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Tachyon
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Post by Tachyon »

I missed that feature! Suddenly I am looking at this item again. No wonder it is so large compared to the GPS units of other camera manufacturers!
[80% Steve, 20% Alfred] ------- Probability of Clear Skies = (Age of newest equipment in days) / [(Number of observers) * (Total Aperture of all telescopes present in mm)]
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Airconvent
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Post by Airconvent »

Saw it earlier but never occurred to me it is suited for astrophotography.

Go Pentax! heh heh

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alvinsclee
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Post by alvinsclee »

Very tempting for Pentax camera supporters. Will consider it on my comeback to this hobby. Perhaps, there will be improved versions later. :D
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weixing
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Post by weixing »

Hi,
The idea is good, but wonder will it work as good as it advertise?? I think there might be some limitation, such as the usable field will be a lot smaller than your lens field of view. Below are two issues that I think might cause problem:
1) If your lens is not flat, not sharp across the field and had distortion, the result might not be good... most lens had this problem especially obvious on pin point objects, such as stars.

2) During the exposure, new stars will be entering the field of view of your lens and some stars will be leaving... only those stars that are inside the field of view and inside the lens distortion free area during the whole exposure will be usable... As a result, the usable field of view might be very small.

Hmm... I think it'll work better if the IS is on the lens... [smilie=confused.gif]

Have a nice day.
Yang Weixing
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