Differences

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--- en:ost:ccds:astrofotografie [2016/10/26 01:14] – [Photography with the DSRL] rhainich
+++ en:ost:ccds:astrofotografie [2021/06/21 13:16] (current) – [Photography with a DSRL] rhainich
@@ Line 1: / Line 1: @@
 ====== Astro photography ======
-The OST can, of course, be used for astro photography. Since two of our [[en:ost:ccds:grunddaten|CCD cameras]] are equipped with filter wheels, they can take pretty pictures -- this article shall be a short manual for this and it shall document our progress in the=is field. It shall still grow, get more details etc., so it's not considered complete so far. :-)
+The OST can, of course, be used for astro photography. Since three of our [[en:ost:ccds:grunddaten|astro cameras]] are equipped with filter wheels, they can take pretty pictures -- this article shall be a short manual for this and it shall document our progress in the=is field. It shall still grow, get more details etc., so it's not considered complete so far. :-)
 The images can be found in our [[en:ost:gallery|gallery]] -- click on the pictures to see more details on their exposure time, filters, dates, etc.
@@ Line 20: / Line 20: @@
   * useful webpages:
-      * [[ttp://www.calsky.com/|CalSky]]
+      * [[https://telescopius.com | Telescopius]]
       * [[http://simbad.u-strasbg.fr/simbad/|Simbad]]
       * further websites can be found [[en:etc:links|here]]
@@ Line 26: / Line 26: @@
 ==== Filter choice ====
-There are several different filters available for our cameras (see [[en:ost:ccds:grunddaten|here]]). Please note, that filters have transmission curves that absorb most of the photons, so the exposure times are getting (much) longer. Depending on the object, some filters are more useful then others. For emission nebulae, e.g., narrow band filters (H-Alpha/Beta, OIII) are especially useful. For stars und galaxies, broad band filters (U/B/V/R/I) mare usually more sense. To construct a (pretty) RGB image later on, best use the B, V, and R band filters.
+There are several different [[en:ost:ccds:grunddaten|filters]] available for our cameras. Please note, that [[en:ost:ccds:grunddaten|filters]] have transmission curves that absorb most of the photons, so the exposure times are getting (much) longer. Depending on the object, some filters are more useful then others. For emission nebulae, e.g., narrow band filters (H-Alpha/Beta, OIII) are especially useful. For stars und galaxies, broad band filters (U/B/V/R/I) mare usually more sense. To construct a (pretty) RGB image later on, best use the B, V, and R band filters.
 ==== Exposure times ====
   * extend here -- maybe a small galery
-  * [[http://polaris.astro.physik.uni-potsdam.de/gallery/2015.05.21/ngc188_sample_inverted.jpg|40min exposure]] -- stars until  V $\sim $ 18mag can be observed
+  * [[http://polaris.astro.physik.uni-potsdam.de/gallery/2015.05.21/ngc188_sample_inverted.jpg|40min exposure]] -- stars until  V $>$ 18mag can be observed
@@ Line 47: / Line 47: @@
   *Flatfields
     - select the same filter as used for the "science" observation
-    - attach (carefully!) the flatfield foil (from the lab room , 1.113) and switch it on (power supply in the locker in the dome)
+    - attach (carefully!) the flatfield foil (from the lab room , 2.009) and switch it on (power supply in the locker in the dome)
     - please note, the flatfield foil must evenly illuminate the whole aperture of the telescope
-    - take a number of exposures with short exposure times (around 3 seconds), prevent the CCD from overflowing
+    - take a number of exposures with short exposure times (around 3 seconds), prevent the camera chip from overflowing
 ==== Data reduction / Stacking ====
@@ Line 76: / Line 76: @@
 ===== Photography with a DSRL =====
-We have a Canon EOS 700D, which is a digital (single) reflex camera (DSLR). This camera allows for very short exposure times (until 1/4000s), while our CCDs only allow for a minimal exposure time of 0.09s. Accordingly, this camera is useful for objects that require short exposure times. Please note that those objects need to be bright enough for such short exposure times. The field of view of the DSLR is larger compared to the other cameras (see [[en::ost:ccds:grunddaten|here]]).
+We also have a Canon EOS 700D, which is a digital (single) reflex camera (DSLR). This camera allows for very short exposure times (until 1/4000s), while our CCDs only allow for a minimal exposure time of 0.09s. Accordingly, this camera is useful for objects that require short exposure times. Please note that those objects need to be bright enough for such short exposure times. The field of view of the DSLR is larger compared to the other [[en::ost:ccds:grunddaten|cameras]].
 Interesting objects are e.g.:
@@ Line 83: / Line 83: @@
           * comets
+We also have an article on [[en:dslr:tethered_shooting|controlling DSLR cameras using a computer]] :-).
-===== Photography with the Webcam =====
+<WRAP center round info 60%>
+**Our new camera, the QHY600M, is a CMOS camera and therefore also allows much shorter exposure times than the old CCD cameras and on the other hand does not have the disadvantages of a DSLR camera, such as a high dark current. More about this when we have more experience... :-).**
+</WRAP>
+==== Lucky imaging how-to ====
+This part will hopefully be filled soon...
+===== Photography with a video camera =====
      * we own one of these, too ;-)
-     * see lucky imaging howto
-     * to be continued...
+\\
+**To be continued...**