RE: [MaxImDL] Re: Processing images with different exposure times


Nov 12, 2010

 


----------------------------

#43513 Nov 12, 2010

I am still experimenting with the right subexposure time. Thus I have a mix

of 30 sec, 60 sec, and 10 min exposures with corresponding darks. If I give

all of this info to Maxim will it correctly match the lights and darks?





Rob Hawley



----------------------------

#43514 Nov 12, 2010

On 2010-11-12 11:47 AM, Rob Hawley wrote: > I am still experimenting with the right subexposure time. Thus I have a mix

> of 30 sec, 60 sec, and 10 min exposures with corresponding darks. If I give

> all of this info to Maxim will it correctly match the lights and darks?



Yes.



Doug



--



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com/



100 Craig Henry Dr., Suite 202

Ottawa, Ontario,

Canada, K2G 5W3



Phone: (613) 225-2732

Fax: (613) 225-9688



----------------------------

#43525 Nov 12, 2010

Rob,



When you use Maxim > Process > Set Calibration and you give it a bunch of different darks, the bank can contain several different types of darks, bias, flats, etc.



For bias frames, maxim will calibrate the light frames with a matching bias based on the number of pixels in X/Y, and Temp. I'm not sure but it might also use camera name.



For dark frames, it uses pixels in X/Y, temp, and exposure duration... and possibly also the camera name.



You can even bank darks for your autoguider if it has temp sensor. but that is a little trickier because software like ACP will automatically adjust the exposure in tenths of second intervals to expose for the best SNR.



I haven't figured out a proper way to configure Maxim for flats and flat darks, etc. If someone has some suggestions for that I'd love to hear them.



Thanks



Dave

--- In MaxImDL@yahoogroups.com, "Douglas B. George" dg@...> wrote:

>

> On 2010-11-12 11:47 AM, Rob Hawley wrote:

> > I am still experimenting with the right subexposure time. Thus I have a mix

> > of 30 sec, 60 sec, and 10 min exposures with corresponding darks. If I give

> > all of this info to Maxim will it correctly match the lights and darks?

>

> Yes.

>

> Doug

>

> --

>

> Doug George

> dgeorge@...

>

> Diffraction Limited

> Makers of Cyanogen Imaging Products

> www.cyanogen.com/

>

> 100 Craig Henry Dr., Suite 202

> Ottawa, Ontario,

> Canada, K2G 5W3

>

> Phone: (613) 225-2732

> Fax: (613) 225-9688

>



----------------------------

#43528 Nov 12, 2010

On 2010-11-12 5:07 PM, mogulskier_groups wrote:

> I haven't figured out a proper way to configure Maxim for flats and flat

> darks, etc. If someone has some suggestions for that I'd love to hear them.



Step 1: Take all needed calibration frames, including flat darks.



Step 2: Load all frames into Set Calibration using Auto Generate.



Step 3. OK.



Doug



--



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com/



100 Craig Henry Dr., Suite 202

Ottawa, Ontario,

Canada, K2G 5W3



Phone: (613) 225-2732

Fax: (613) 225-9688



----------------------------

#43530 Nov 12, 2010

I have been using the auto calibration and noted that it sorted by type and

identified binning, temps, and duration. So far I have always manually

matched like with like by only running the one minute lights with the one

minute darks of similar temps. I was fairly sure the answer was that it

would handle it correctly. Now I can just use it and know it will work as I

need it to.





Rob Hawley





-----Original Message-----

From: mogulskier_groups [mailto:mogulskier_groups@...]

Sent: Friday, November 12, 2010 2:07 PM

To: MaxImDL@yahoogroups.com

Subject: [MaxImDL] Re: Processing images with different exposure times



Rob,



When you use Maxim > Process > Set Calibration and you give it a bunch of

different darks, the bank can contain several different types of darks,

bias, flats, etc.



For bias frames, maxim will calibrate the light frames with a matching bias

based on the number of pixels in X/Y, and Temp. I'm not sure but it might

also use camera name.



For dark frames, it uses pixels in X/Y, temp, and exposure duration... and

possibly also the camera name.



You can even bank darks for your autoguider if it has temp sensor. but that

is a little trickier because software like ACP will automatically adjust the

exposure in tenths of second intervals to expose for the best SNR.



I haven't figured out a proper way to configure Maxim for flats and flat

darks, etc. If someone has some suggestions for that I'd love to hear them.



Thanks



Dave



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