Seeing Monitor units?

[StuartT]

What are the units on the x-axis of the seeing monitor? How do I know what value is good? Is 6.4 good or bad? This is not explained in the manual

Thanks

Capture.JPG (288.84 KiB) Viewed 7407 times

[admin]

Hi,

the units on the X axis are the quality of the image (amount of contrast), and the height is the number of times a frame has been seen with that quality level. Basically it's a histogram, and the good stuff is on the right hand side, so you set your threshold somewhere to the right of the main peak (the distance to the right depends on how good you want the quality to be and how long you are prepared to wait - further right is better quality and likely a longer wait...)

cheers,

Robin

[StuartT]

ok, so the units are arbitrary then, rather than arcsec or some specific measure?

Is the idea of this monitor to wait until the value increases sufficiently before starting image capture? As in, is it purely for my guidance? Or does it control the camera in some way?

[admin]

Hi,

yes, the units are essentially arbitrary - comparing the quality of recent frames.

You can either use it for your reference or use one of the two options to automate the process

* triggered capture - starts a capture when the value exceeds the set threshold
* filtered capture - starts a capture now, but only saves the frames that exceed the set threshold

Hope this helps,

Robin