According to the manual, it is not entirely clear to me which settings can be set for a series of, for example, 90 images in Fits format with a defined time interval and defined exposure.
Below there are an example diagrams for the running:
Start > / Eposure [sec] / wait [sec] / Eposure / wait / Eposure / wait / …..
Start > / Eposure [90"] / wait [18"] / Eposure [90"] / wait [18"] / Eposure [90"] / wait [18"] / ….etc
Thanks for a tip
astroGre
Series of images with defined times
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Re: Series of images with defined times
Hi,
first set up the camera with the settings you require - ie
exposure = 90s
output format = fits
(and any others like gain, 8/16 bit mode, etc)
Turn off the 'Live View' option in the toolbar - without changing this, the camera will continue capturing 90s frames all the time, which is probably not what you want.
Now, press 'Start Capture' and in the start capture window, set it up like this:
Note that the capture itself is set to 'Single Frame', but the sequence options below are set up to repeat the single frame capture multiple times, with a delay of 18s between repeats.
Hope this helps,
Robin
first set up the camera with the settings you require - ie
exposure = 90s
output format = fits
(and any others like gain, 8/16 bit mode, etc)
Turn off the 'Live View' option in the toolbar - without changing this, the camera will continue capturing 90s frames all the time, which is probably not what you want.
Now, press 'Start Capture' and in the start capture window, set it up like this:
- Capture.JPG (39.56 KiB) Viewed 664 times
Hope this helps,
Robin
Re: Series of images with defined times
Robin,
logical, thanks for pointing out the solution. So I can record a series of variable star observations as usual.
Regards
astroGre
logical, thanks for pointing out the solution. So I can record a series of variable star observations as usual.
Regards
astroGre
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- Exposure_SharpCap.jpg (69.3 KiB) Viewed 659 times
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admin
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Re: Series of images with defined times
Hi,
yes, definitely possible to do that. One thing to be aware of though is that the delay part is not exact - SharpCap will definitely delay for the time specified, but since there is also the time taken to start the new exposure, set up the capture, etc, so if you set a 20s delay you will probably get something between 20.1s and 22s between the previous frame ending and the next one starting.
However, the timings of each individual frames will be written into the FITS headers of the save file. Again though, worth noting that unless you have a QHY camera with GPS built in, frame times are calculated from the time that SharpCap received the frame data (which is tagged as the frame end time) and the frame start time is calculated by subtracting the exposure from the end time. In reality, SharpCap receives the data some unknown time after the frame really finished, which can vary from a few ms delay for small area captures on USB3 to several seconds for large CCD sensors connected over USB2.
cheers,
Robin
yes, definitely possible to do that. One thing to be aware of though is that the delay part is not exact - SharpCap will definitely delay for the time specified, but since there is also the time taken to start the new exposure, set up the capture, etc, so if you set a 20s delay you will probably get something between 20.1s and 22s between the previous frame ending and the next one starting.
However, the timings of each individual frames will be written into the FITS headers of the save file. Again though, worth noting that unless you have a QHY camera with GPS built in, frame times are calculated from the time that SharpCap received the frame data (which is tagged as the frame end time) and the frame start time is calculated by subtracting the exposure from the end time. In reality, SharpCap receives the data some unknown time after the frame really finished, which can vary from a few ms delay for small area captures on USB3 to several seconds for large CCD sensors connected over USB2.
cheers,
Robin