Nipan_51
Lives in
Athens, Greece
Works as a
Chemist/Retired
Has a website at
http://www.flickr.com/photos/npantazis1/
Joined on
Jul 3, 2008
About me:
Canon Poweshot A 720IS |
Comments
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| Moto Cross in Mojave Desert Captured in Mid-Flight by RBFresno from monthly motion challenge | Sleep Hollow Light by avalvo from Medium Format - Specific Equipment Challenge | Veggie3E4A4832-HDR by Canonman1960 from Still Life | Angel Of Remembrance by wam7 from Monuments & statues |
Συγχαρητήρια!!!
It looks like a missing link coming to place much too late...
I have got this lens for my Pentax K-S2 camera. In general, I am happy with it. Today, however, I discovered a small problem: When it is in full zoom and the camera is set on its back, the zooming section retreats spontaneously, as low as about 24mm. Does anyone know if there is some way to fix it?
star shooter: Anyone know how the sensor 'moves' in relation to the stars? How long can one exposure to the stars with this feature and what lens will it work with to get the best picture?
I had a Pentax K-30, that collaborated with the GPS module very well. I had shot even 2 min good exposures at 300 mm. Of course, sometimes I had to perform the "Precise Calibration" function in order to achieve that. The new KS-2 is not that good. Another issue is that the camera has to be moved from time to time, if somebody has to track the same sky area for a long time.
star shooter: Anyone know how the sensor 'moves' in relation to the stars? How long can one exposure to the stars with this feature and what lens will it work with to get the best picture?
The sensor is moved by its stabilisation mechanism , under the guidance of the GPS system, taking into account the geografical coordinates of the camera position. In this way, the sensor is tracking the same spot in the sky. The max. time to do that depends of the lens focal length and the distance from the celestial pole and cannot be longer than 5 minutes. The camera, as a whole is not tracking the target.
For lower level bodies (K-5, K-30, K-S2) an external accessory is available, the Pentax O-GPS1.
It looks like image quality has reached its ceiling
Συγχαρητήρια, Βασίλη!