Author Topic: Binned flats  (Read 2816 times)

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Fay

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Binned flats
« on: Mar 08, 2011, 17:46:38 »
If Flats are binned, do they have to brought up to 1x1 before stacking or does the program take care of it?

Thanks
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Mac

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Re: Binned flats
« Reply #1 on: Mar 08, 2011, 18:16:38 »
Why are you binning flats?
its not as if they take long to take.

Mac.
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MarkS

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Re: Binned flats
« Reply #2 on: Mar 08, 2011, 19:14:28 »
Quote from: Mac
Why are you binning flats?

Sometimes they don't work out right - they're just rubbish and need to be thrown away.

Fay

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Re: Binned flats
« Reply #3 on: Mar 08, 2011, 19:48:00 »
Well Mac, 1x1 takes an age, 20 take around 20 mins. with QSI
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Whitters

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Re: Binned flats
« Reply #4 on: Mar 09, 2011, 00:29:16 »
Your calibration images must be taken at the same bin level as your images. Flats, darks and bias.
If your camera is temperature controlled then you can take calibration files one night and reuse them on another. But you should refresh your calibration images regularly.

Mac

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Re: Binned flats
« Reply #5 on: Mar 09, 2011, 00:37:30 »
Quote
Well Mac, 1x1 takes an age,


I always though you took a flat against a white background,
and the flat would only be fractions of a second.

so that the sensors are just over half full.

so why are they taking so long.

Mac.
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If you argue with an idiot, there are two idiots.

Ian

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Re: Binned flats
« Reply #6 on: Mar 09, 2011, 07:06:56 »
Fay, the camera was plugged into a usb 2 port on it's own wasn't it?

Whitters

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Re: Binned flats
« Reply #7 on: Mar 09, 2011, 07:09:22 »
I guess that would depend on the illumination source. Fay, how do you take your flats?

Fay

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Re: Binned flats
« Reply #8 on: Mar 09, 2011, 07:44:57 »
With the Atik or Canon, they are very fast, with the QSI they take 20 sec to download each sub. Same time as downloading a long exposure sub. It takes the image in the given time & then takes 20 secs to finish off.
 I use a light panel
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Mike

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Re: Binned flats
« Reply #9 on: Mar 09, 2011, 08:00:48 »
Fay, do you have the latest firmware?

http://www.qsimaging.com/firmware_updates_beta.html

They claim download times with it should be 1 or 2 seconds.
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Fay

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Re: Binned flats
« Reply #10 on: Mar 09, 2011, 08:04:50 »
Yes, the camera came with 5.5  updated
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Fay

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Re: Binned flats
« Reply #11 on: Mar 09, 2011, 08:14:59 »
From QSi Forum



Re: [QSI-ccd] Just purchased a 583WS

Fay,

You're running the latest software and firmware. 

It will take about 20 seconds to download a full-frame bin 1x1 image, or about 2 seconds for a small subframe for focusing.

Regards,
Kevin

On Mon, Mar 7, 2011 at 2:51 PM
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Mike

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Re: Binned flats
« Reply #12 on: Mar 09, 2011, 08:20:08 »
Oh dear.  :(
We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology. Carl Sagan

mickw

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Re: Binned flats
« Reply #13 on: Mar 09, 2011, 08:29:48 »
Are you connecting the QSI to a USB2 port ?
How many USB leads go to the QSI ? Only the download cable needs USB, the control should only need 1.1

If you don't know if a port is USB2, download this - USBView, it's the 7th one down - make sure you download the Microsoft one
http://www.ftdichip.com/Support/Utilities.htm

*Correction*
The above will tell you what the device is, not the port/controller
The USB host controller (Control Panel, System, Hardware, Device Manager) should be listed as Enhanced for USB2
« Last Edit: Mar 09, 2011, 12:45:29 by mickw »
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Fay

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Re: Binned flats
« Reply #14 on: Mar 09, 2011, 08:31:14 »
Well I am ok with the main lights taking that long, but the flats are a nuisance. I am glad that I can frame a subject in 7 secs doing 4x4, and as long as I can get a star in the focus box, I am happy.
It is healthier to be mutton dressed as lamb, than mutton dressed as mutton!