Γειά σας φίλοι, Προσπάθησα να εφαρμόσω τη μέθοδο αυτή αλλά χωρίς επιτυχημένο αποτέλεσμα μέχρις ώρας. Διαπίστωσα στην αστροφωτογράφιση ότι υπάρχει κίνηση των άστρων για χρόνους έκθεσης άνω των 2 λεπτών...άρα κάτι δεν έχω κάνει σωστά. Παραθέτω τα βήματα που ακολούθησα και θα ήθελα να με διορθώσετε αν κάτι είναι λάθος. 03 September 2005 Vixen 4" refractor GP mount Skysensor 2000 PC POLAR ALIGNMENT STAR DRIFT METHOD 1. Adjust mount in azimuth ********************** - pick a star near the meridian (due south, between 60-70 degrees above the horizon). The star should not be too bright (about magnitude 5-6) I selected star δ aquila with coordinates RA 19h 25m 29.900s Dec +03°06'53.191" - Use an illuminated reticle eyepiece and center the star. Align the eyepiece's crosshairs with the north-south and east-west directions. - Once the crosshairs are oriented place the star on the horizontal line. - Let the telescope track for a minute or so. You will see the star begin to drift off the line. It will drift either north (above the horizontal line) or south (below the horizontal line). Ignore any east-west (left-right) drift. * If the star drifts up use the mount's azimuth adjustment knobs to move the mount so that the star appears to move right in the field of view. * If the star drifts down use the mount's azimuth adjustment knobs to move the mount so that the star appears to move left in the field of view. - Use the hand controller to move the star back onto the horizontal line. Let the star drift again. Adjust the mount in azimuth until the star does not drift up or down the horizontal line. Again, ignore any left-right motion. Once the star stays for 5 minutes on the horizontal line without any up or down drift, the mount is accurately aligned in azimuth. 2. Adjust mount in altitude ******************************** - pick a star 20 degrees above the Eastern horizon and about +20 degrees declination The star should not be too bright (about magnitude 5-6) I selected star SAO 74267 with coordinates RA 00h 47m 20.325s Dec +24°16'01.841" - Use an illuminated reticle eyepiece and center the star. Align the eyepiece's crosshairs with the north-south and east-west directions. - Once the crosshairs are oriented place the star on the horizontal line. - Let the telescope track for a minute or so. You will see the star begin to drift off the line. * If the star drifts up (north) use the mount's altitude adjustment knobs to move the mount so that the star appears to move down (south) in the field of view. * If the star drifts down use the mount's altitude adjustment knobs to move the mount so that the star appears to move up in the field of view. - Use the hand controller to move the star back onto the horizontal line. Let the star drift again. Adjust the mount in altitude until the star does not drift up or down the horizontal line. Again, ignore any left-right motion. Once the star stays for 5 minutes on the horizontal line without any up or down drift, the mount is accurately aligned in altitude. You are ready to begin imaging the heavens!