Re: [MaxImDL] QHY5 guiding


Nov 20, 2013

 


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#55190 Nov 20, 2013

Hi, i am really new to Maxim dl and the guiding routine, but, i have nevertheless managed to guide following the tutorials.my issue is with the calibration subs that my QHY5 ��takes and the poor quality of them!..very noisy��

i can improve one easily with the screen stretch function but all subsequent frames are poor, how can i ensure that all the subs come in and look good?Ray



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#55193 Nov 20, 2013

Why bother if it works? Mine are horrible and it works it all works just fine.��



Sent from my Verizon Wireless 4G LTE smartphone



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#55196 Nov 20, 2013

Are you using calibration? I use an Orion SSAG, which I think is basically the same camera. Calibration improves how the image "looks" but often doesn't really matter, it will guide fine either way..

Josh



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#55197 Nov 21, 2013

Thank you for both replies, and yes it is a fair point to ask ���why bother if it���s working��� The answer for me is simple; I am quite new to Maxim and coming from PHD the guiding calibration subs looks so very different to the point of a fault and it���s hard to tell if the stars are good or bad due to the horrible screen appearance.I do not know what to expect yet.However I am pleased of course; that I see calibration work. and quite quickly! All I had to do was increase the cal time from 10 to 20. ��The only calibration I am using for the camera are darks which it asks for by default!So suppose I could ask the question slightly differently!Can I temporarily improve the subs so that they come in looking better until I get more used to the way it works? ��Ray �� �����Why bother if it works? Mine are horrible and it works it all works just fine��� �� ��From: MaxImDL@yahoogroups.com [mailto:MaxImDL@yahoogroups.com] On Behalf Of Josh HuffordSent: 21 November 2013 03:50To: MaxImDL@yahoogroups.comSubject: Re: [MaxImDL] QHY5 guiding



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#55198 Nov 21, 2013

The auto screen stretch in Maxim can sometimes make an image "look" bad. When using your camera do you have a small window that allows you to adjust the camera gain? You do with the Orion SSAG, lowering the gain some will also help with this. I do 20 each of Darks and Bias, create master frames and keep them in my calibration folder so I have full calibration for my guide camera.

Josh



On Thu, Nov 21, 2013 at 3:29 AM, Ray Leeson rayleeson@...> wrote:

.Thank you for both replies, and yes it is a fair point to ask .why bother if it.s working.

The answer for me is simple; I am quite new to Maxim and coming from PHD the guiding calibration subs looks so very different to the point of a fault and it.s hard to tell if the stars are good or bad due to the horrible screen appearance.I do not know what to expect yet.However I am pleased of course; that I see calibration work. and quite quickly! All I had to do was increase the cal time from 10 to 20..The only calibration I am using for the camera are darks which it asks for by default!So suppose I could ask the question slightly differently!Can I temporarily improve the subs so that they come in looking better until I get more used to the way it works?.Ray ...Why bother if it works? Mine are horrible and it works it all works just fine...From: MaxImDL@yahoogroups.com [mailto:MaxImDL@yahoogroups.com] On Behalf Of Josh Hufford

Sent: 21 November 2013 03:50To: MaxImDL@yahoogroups.comSubject: Re: [MaxImDL] QHY5 guiding



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#55200 Nov 21, 2013

Hi Josh, I think that it is the auto stretch function that does the damage to this cameras subs, I do not have the option (as far as I can see) in Maxim to alter the gain, PHD allows it with the set up dialogue box and in the interface. ��I���ll look at the calibration frame idea, however I guess with the QHY5 it���s not that easy and I should�� be grateful that it is calibrating albeit with a small backlash issue.Thanks again ��Ray �� ��From: MaxImDL@yahoogroups.com [mailto:MaxImDL@yahoogroups.com] On Behalf Of Josh HuffordSent: 21 November 2013 14:08To: MaxImDL@yahoogroups.comSubject: Re: [MaxImDL] QHY5 guiding



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#55201 Nov 21, 2013

The auto stretch is not doing ���damage��� to your subs. It���s just not showing you the star(s) the way PHD does. This really has nothing to do with the quality of the guiding. I would note that calibration means a couple of things ��� calibrating the sub using darks ��� which I���m not talking about, and the calibration routine in maxim under the guide tab which I am talking about. ��If you want to do your own stretch just click on the screen stretch icon on the toolbar which looks like a small histogram. From there you can stretch to your heart���s content. This will do nothing to the quality of the guiding results (sadly), however.Rgrds-Ross ��From: MaxImDL@yahoogroups.com [mailto:MaxImDL@yahoogroups.com] On Behalf Of Ray LeesonSent: Thursday, November 21, 2013 8:23 AMTo: MaxImDL@yahoogroups.comSubject: RE: [MaxImDL] QHY5 guiding



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#55202 Nov 21, 2013

On 2013-11-21 11:22 AM, Ray Leeson wrote: >

>

> Hi Josh, I think that it is the auto stretch function that does the damage to

> this cameras subs,



Auto Stretch has NO EFFECT WHATSOEVER on the images. It only adjust how they

are viewed on the screen. The guider images are analyzed before the image even

appears on the screen.



Doug



--



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com/



59 Grenfell Crescent, Unit B

Ottawa, Ontario,

Canada, K2G 0G3



Phone: (613) 225-2732

Fax: (613) 225-9688



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#55203 Nov 21, 2013

Hi Ross Doug:An unfortunate turn of phrase from me, I meant ���damage��� as a relative term compared to PHD and how it presents the image to me on screen.I appreciate the way Maxim does the stretch and I know that I can improve the image by manipulating the stretch screen. I have used the low, medium etc options to try and improve the image but Maxim seems to ignore my inputs on each subsequent image it downloads. ��I���m not completely sure yet what I���m doing and I���m in danger of talking out of my hat, I need to spend more time with it and work on trying to understand what���s happening. ��Thanks Ray ��From: MaxImDL@yahoogroups.com [mailto:MaxImDL@yahoogroups.com] On Behalf Of Ross SalingerSent: 21 November 2013 16:34To: MaxImDL@yahoogroups.comSubject: RE: [MaxImDL] QHY5 guiding







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#55204 Nov 21, 2013

On 2013-11-21 12:11 PM, Ray Leeson wrote:

> I have used the low, medium etc options to try and improve the image but Maxim

> seems to ignore my inputs on each subsequent image it downloads.



It only remembers the setting for the window. If you close the window and then

autoguiding has to open another one, then it will start with the default setting.



By the way, you can change the definition of "Medium Stretch" if you like.



See www.cyanogen.com/help/maximdl/HID_VIEW_HISTOGRAM.htm



--



Doug George

dgeorge@...



Diffraction Limited

Makers of Cyanogen Imaging Products

www.cyanogen.com/



59 Grenfell Crescent, Unit B

Ottawa, Ontario,

Canada, K2G 0G3



Phone: (613) 225-2732

Fax: (613) 225-9688



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