Date   

Re: Precise polar alignment of the azimuth axis

John
 

Aloha All,

  I will review all of this, thanks! 

  Somehow I missed the info on page 26 of the pdf file.  That pdf file is for keypad ver 4.19.3 and I was looking in the newer Keypad manual ver 5.x.x.x (dated 11 Nov 2020).
The newer manual is a little different.  No worries!!

  I'm using the Sharpcap polar align tool which is probably similar to the others (ie take an image and rotate the ra axis 90 degrees, take another image, and then adjust the mount to the ncp).
I can do this thru either the guide scope camera on the main C8 camera. But I'm a little worried that I might be introducing some small ortho or cone errors. I guess a Polemaster camera mounted
on front of the Mach 2 would take care of that!  And the modeling will help to (just haven't got to it yet)

    John

 


Re: One computer I can create a virtual port. Second computer says I have to buy a license for the activeX control (virtual port) for this computer. #APCC

Bill Long
 

Very unlikely, but possible. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Micheal Fields Jr via groups.io <mpfjr@...>
Sent: Tuesday, December 22, 2020 11:25 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] One computer I can create a virtual port. Second computer says I have to buy a license for the activeX control (virtual port) for this computer. #APCC
 
Ray,

So today I decided to go ahead and reset my PC. By reset I mean in terms of Windows 10 Reset where it wipes the drive and re-installs from scratch.
I am happy to say that so far everything is working as it should. 
One thing I did differently is that there is a Windows 10 feature update/optional that is called [20H2].  I did NOT install that update.   On my other intel based computers that APCC has been working with, this feature update is also not installed.  However I may have had it installed on this PC.  Is this the reason it wasn't working?  Maybe/maybe not.  But it is something to keep in the back of your head in case someone else reports this issue.


On Sun, Dec 20, 2020 at 01:27 PM, Ray Gralak wrote:

The only thing I can think of is that my main PC is a AMD Ryzen system not Intel. The other two systems are Intel
based.
Interesting. I would be surprised if that is the reason, but stranger things have happened.

Just out of curiosity, can you try creating a new Windows user account that has admin privileges and install it from that account?

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver



Re: One computer I can create a virtual port. Second computer says I have to buy a license for the activeX control (virtual port) for this computer. #APCC

Micheal Fields Jr
 

Ray,

So today I decided to go ahead and reset my PC. By reset I mean in terms of Windows 10 Reset where it wipes the drive and re-installs from scratch.
I am happy to say that so far everything is working as it should. 
One thing I did differently is that there is a Windows 10 feature update/optional that is called [20H2].  I did NOT install that update.   On my other intel based computers that APCC has been working with, this feature update is also not installed.  However I may have had it installed on this PC.  Is this the reason it wasn't working?  Maybe/maybe not.  But it is something to keep in the back of your head in case someone else reports this issue.


On Sun, Dec 20, 2020 at 01:27 PM, Ray Gralak wrote:
The only thing I can think of is that my main PC is a AMD Ryzen system not Intel. The other two systems are Intel
based.
Interesting. I would be surprised if that is the reason, but stranger things have happened.

Just out of curiosity, can you try creating a new Windows user account that has admin privileges and install it from that account?

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver



Re: leveling the RAPAS on Mach2

Christopher Erickson
 

I would worry more about load instability on an unlevel tripod than polar alignment accuracy. Having the RAPAS rotated ever-so-slightly will still give you a rather precise polar alignment. And if you are imaging, you probably want to follow up with drift alignment anyway.

I hope this helps.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

On Tue, Dec 22, 2020, 8:01 AM Terri Zittritsch <theresamarie11@...> wrote:

Wei Hao,
I don't believe you need to have a leveled tripod to use RAPAS.  It's only aligning the RA axis to the pole.    So as long as you have the adjustability to do this, with your altitude and azimuth adjusters...      I hope I'm not misunderstanding your question.

I have a RAPAS and polemaster.   I used my polemaster alignment (which is very good) to adjust my rapas.  I purchased the rapas to use in the field when I may not have a computer.    


best,

Terri


Re: Precise polar alignment of the azimuth axis

Peter Nagy
 

Hi Rolando, 

This almost looks like Quick Star Drift Method for use with a finder scope using Meridian Delay as described in

https://astro-physics.info/tech_support/mounts/keypad/keypad-manual.pdf

See page 26.

I used to use this method before PoleMaster became available and it worked great. This is good for location that does not have good visible view of Polaris. 

Peter 


leveling the RAPAS on Mach2

weihaowang
 

Hi,

I understand that Mach2 can be used without leveling the tripod. This is great for us, since our tripod cannot be adjusted and therefore cannot be leveled.  However, this will create a problem for the polar alignment.  We purchased an RAPAS, and it's my understanding that using it requires the tripod to be leveled.  I can of course use a PoleMaster or drift alignment without worrying about leveling, but I like the quickness of a polar scope in the field.  So I want to find a solution.

A question here is whether I can assume the top surface of Mach2's RA motor box to be perfectly aligned to RAPAS?  

If the answer is yes, then a simple workaround would be to use my iPhone's inclinometer on the top surface of the RA motor box to measure the tilt, then do the necessary compensation in RAPAS.  I think iPhone's inclinometer is good to a degree.  Given the distance between Polaris and the pole, a 1-degree error in leveling would translate to 1 arc-minute of polar alignment error, which should be good enough for my imaging.

How do you think about the method above?  Or do you have any other suggestions on using Mach2+RAPAS on a unleveled tripod?

Cheers,
Wei-Hao

--

Homepage:

http://www.asiaa.sinica.edu.tw/~whwang/

Astrobin gallery:
http://www.astrobin.com/users/whwang/


Re: Version P02-08 now available for GTOCP4 and GTOCP5 control boxes

Terri Zittritsch
 

I finally did the update, and used the USB utility which is much more straight forward to use.    After doing it once, I doubt I'll have to refer to instructions again.     I'll give the orthogonal utility a try as soon as I can see the stars again.      No conjunction siting for those of us in Vermont.    Back in the pea soup we are.

Thank you,
Terri


Re: Precise polar alignment of the azimuth axis

Roland Christen
 

You can use an app like Pempro or PHD2 to do basic drift alignment. They are both good at what they do, although PEMPro is really the standard.

Azimuth alignment:
Since I'm always looking for ways to use new ways to get perfect polar alignment, I have come up with a nifty way (for me) to do the azimuth align. Using MaximDL, I turn on the crosshairs and place a star near the meridian at around Dec = 0 on the center of the crosshairs (using the buttons). I walk away for 10 minutes and take another exposure to see which way the star has drifted and how far. In my case the RA direction is Left to Right, so the star will drift up or down in Dec. I ignore any RA drift at this point, but measure how many pixels the star has moved in that time period and the direction. I usually take an image for reference.

I then put the star back on the crosshairs via the keypad buttons but then move it either left or right along the RA line in the direction of +- declination. Using the azimuth adjuster, I move it near to the right edge to see which direction it drifts. If it drifts in the same direction as before, only faster, I know that I need to place the star on the left side of the center via the azimuth adjuster. I let it drift for 10 minutes again and take a second exposure. Using the two drift positions I can draw a line between the two star positions, and where they intersect is where I need to move the star via the azimuth adjuster.

As an example, let's say that the star drifts 10 pixels north when it is centered, and 20 pixels south when it is near the left edge. That means then that the intersection of a straight line will cross the horizontal crosshair line at about 1/3 of the way from center. And that is where I move the star using the azimuth adjusters. I did this recently with my observatory Mach2 mount and nailed the azimuth so accurately in the first try that I got no drift in Dec for over 30 minutes near the meridian.

Altitude alignment:
For the altitude I have another quick method also, which is quite accurate. I pick a star near Dec = 0, near the meridian (within 1/2 hour or so) and center it on the crosshairs. Can even be the same star as above. I press Rcal to nail it as a reference. Then i simply press Flip Scope. The mount will pick up the star on the opposite side, but offset from the center. I don't worry about left-right offset because that's simply the orthogonal error. I note the amount of N-S error, then move the star using the altitude adjuster until it is exactly 1/2 way to the RA centerline. Then I move it to the crosshair center via the buttons and press Rcal. You can then flip the scope back to the 1st side and repeat the process on that side. A couple of iteration will take maybe 5 minutes and you should be able to go to the RA centerline on each side (ignore the left-right offset). All this assumes that your camera chip is set to line up N-S and E-W and not set at an angle.

Rolando



-----Original Message-----
From: John <obee11@...>
To: main@ap-gto.groups.io
Sent: Mon, Dec 21, 2020 5:47 pm
Subject: Re: [ap-gto] Precise polar alignment of the azimuth axis

Aloha Roland,

  ok, thanks!  I need to read up on that drift align procedure a couple more times.  I'm going to adjust the RAPAS to what I have now and then double check more polar alignments

  I'm hoping to get to the keypad modeling next and then move on to the apcc modeling (with Thum) in a couple months.

  The Mach 2 seems to be a great mount!  I was a little over whelmed at first.  And I can carry the mount attached to the ats pier at the same time!  As long as I don't trip I should be ok!  :)
      John

--
Roland Christen
Astro-Physics


Re: Precise polar alignment of the azimuth axis

John
 

Aloha Roland,

  ok, thanks!  I need to read up on that drift align procedure a couple more times.  I'm going to adjust the RAPAS to what I have now and then double check more polar alignments

  I'm hoping to get to the keypad modeling next and then move on to the apcc modeling (with Thum) in a couple months.

  The Mach 2 seems to be a great mount!  I was a little over whelmed at first.  And I can carry the mount attached to the ats pier at the same time!  As long as I don't trip I should be ok!  :)

      John


Should Mach1 users follow the APCC Pro upgrades? #APCC

Nick Iversen
 

I'm a bit wary of all these updates to mount firmware and APCC Pro because I see them as mainly for Mach2 users. I'm on P01 firmware and APCC Pro 1.7.1.5 and WiFi 04 and I'm scared of going to P02 and 1.8 in case I lose, say, the ability for Sequence Generator Pro to do a meridian flip.

Essentially - what is new and what are the advantages of the upgrades?

The only problems I have with my current versions is that sometimes the WiFi stops working (a known problem I believe) and sometimes, at random, APCC loses it's USB connection to the mount and the mount stops tracking. Are either of these problems addressed in the upgrades?


Re: Version P02-08 now available for GTOCP4 and GTOCP5 control boxes

Gary Steffens
 

Hi Marj, I was just looking for the new keypad software (V5.xxx) and was going to ask where I could find it. Given V5.xxx is not available yet for GTOCP4 control boxes, is it possible to install an earlier version of GTOCP4 software and if so where can I find it? I didn't see an archive of previous releases on the web site.
Thanks!
Gary


Re: Precise polar alignment of the azimuth axis

Roland Christen
 

The Daytime alignment is not precise enough to use for aligning the RAPAS. Drift alignment is the best way. It takes a bit of time but once it is done, you don't have to do it ever again after aligning your RAPAS.

Rolando



-----Original Message-----
From: John <obee11@...>
To: main@ap-gto.groups.io
Sent: Mon, Dec 21, 2020 3:40 pm
Subject: Re: [ap-gto] Precise polar alignment of the azimuth axis

Aloha All,

  Well, I was able to get the new Mach 2 out for the first time over the weekend.  So far so good!  Still re-learning the ropes.

  I need to make a slight adjustment to the RAPAS, plus I wanted to check my current polar alignment using "Roland's GTO Quick Star Drift Method" (which can also be found in the  Mach 2 User Guide, Appendix C, pg 41 [dated Aug 2020]).  I used Sharpcap's polar align routine on my C8 Edge at F/7 with an ASI 1600 camera which puts the image scale at 0.55 arc/sec per pixel.  Last night (and Sat night) as a test, I was actually able to get 8 min unguided images without any oblong stars!  Sharpcap says I'm within 0.5 arcsecs of the pole, but I don't trust it too much due to possible orthogonality issues (or cone error) with the C8 edge.  Not sure if that's the same thing.

  Anyway tonight, I was hoping to check my current polar alignment with the Quick Star Drift Method, but I'm a little confused as to which calibration star to pick (for the AZ adjust part).  I was planning on using Alpheratz for the first star near the Zenith, when it is on the West side of the Meridian.  But when I push the scope South, towards the second 'calibration star,' I'm having trouble visualizing which star to pick.  Do I pick a star that has the same RA coordinates as Alpheratz?  Also, when moving the scope to the second star in the South, does it matter if I manually push the scope there or can the keypad be used to slew it there? 

  Once I get this done, I might try the other "drift alignment - ra correction method" that's mentioned on page 40.  All I'm trying to do now, is get the RAPAS really dialed in. So in the future, I'm hoping I can get polar aligned with just the RAPAS and then jump right into the modeling!  Thanks any sorry for the long email!

      John

--
Roland Christen
Astro-Physics


Re: Precise polar alignment of the azimuth axis

John
 

Aloha All,

  Well, I was able to get the new Mach 2 out for the first time over the weekend.  So far so good!  Still re-learning the ropes.

  I need to make a slight adjustment to the RAPAS, plus I wanted to check my current polar alignment using "Roland's GTO Quick Star Drift Method" (which can also be found in the  Mach 2 User Guide, Appendix C, pg 41 [dated Aug 2020]).  I used Sharpcap's polar align routine on my C8 Edge at F/7 with an ASI 1600 camera which puts the image scale at 0.55 arc/sec per pixel.  Last night (and Sat night) as a test, I was actually able to get 8 min unguided images without any oblong stars!  Sharpcap says I'm within 0.5 arcsecs of the pole, but I don't trust it too much due to possible orthogonality issues (or cone error) with the C8 edge.  Not sure if that's the same thing.

  Anyway tonight, I was hoping to check my current polar alignment with the Quick Star Drift Method, but I'm a little confused as to which calibration star to pick (for the AZ adjust part).  I was planning on using Alpheratz for the first star near the Zenith, when it is on the West side of the Meridian.  But when I push the scope South, towards the second 'calibration star,' I'm having trouble visualizing which star to pick.  Do I pick a star that has the same RA coordinates as Alpheratz?  Also, when moving the scope to the second star in the South, does it matter if I manually push the scope there or can the keypad be used to slew it there? 

  Once I get this done, I might try the other "drift alignment - ra correction method" that's mentioned on page 40.  All I'm trying to do now, is get the RAPAS really dialed in. So in the future, I'm hoping I can get polar aligned with just the RAPAS and then jump right into the modeling!  Thanks any sorry for the long email!

      John


Keypad for Mach2 #Mach2GTO

Dean Jacobsen
 

I seem to be a bit behind the times with regard to recent developments concerning the keypad.  I recall seeing mention of the new keypads and the their software upgrades in posts over the last month or so but when I go to the AP web site the most recent keypad manual I can find on the support pages is 4.19.3 and the newest keypad upgrade is also 4.19.3. 

I think that I would like to have the new kepad for my Mach2 but I would like to read the manual first before deciding.

Is the new kepad out.  If so, where is the manual?
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ 
Amateur Radio Call Sign - W6DBJ


Re: M42 from my future observatory site

Bill Long
 

Not all of them are bad. It is a game of camera roulette which I don't seem to win very often. 😉

The Gerd CTU is the right way to go, the built in "tilt plate" from ZWO is not very good at all. Your camera may be fine, and only need a tiny tweak to get it working perfectly. Others have had that experience, although I suspect its more of a F ratio thing. Faster = more problems when tilt is present. The smaller pixels on those cameras also bring their share of issues when tilt is present as well. 

My plan is to stay on the sidelines for this IMX455 and allow other manufacturers to release theirs. Atik and SX are both working on one, and both of them take great care in ensuring their sensors are squared. For those wanting to buy now, I would suggest the QHY600. Its on sale too. :) 


From: Terri Zittritsch <theresamarie11@...>
Sent: Monday, December 21, 2020 10:50 AM
To: Bill Long <bill@...>
Cc: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M42 from my future observatory site
 
Hi Bill, thanks for letting me know.. I wish I would have found this on-line before I purchased because  once I have my mind set… as soon as I saw the ad I pulled the trigger.  I did search a bit and noticed people talking about the need for a big (68mm) tilt ring  in front of AOG (which I have with the used package I found).   Almost entirely the discussions I found were about vignetting, and not really high tilt.  I do know there is the potential for light leakage around the 68mm tilt ring so need to fix that, but should not be a big issue.  The guy I purchased from did suggest the Gerd  Neumann CTU if I wanted a better tilt system for small amounts of tilt because the tilt ring is hard to adjust for small amounts of tilt.  I’ll keep my fingers crossed.   If I find it hard, I’ll get a Gerd Neumann CTU.    With all I have invested, donuts are unacceptable.  

I’d consider that much tilt, as your saying, a reason to return the camera.. wow.    Did you talk to Sam (I think that’s him at ZWO)?    Maybe he would have taken it back. 

I just purchased 2” Chroma filter set (3nm nb), but still waiting for the OIII which was just shipped.    I ordered my adapters from precise parts and will not get them till mid january.       

I wonder if there is any way for me to test this now?     Today I’m trying to wish the clouds away to get a view of the conjunction.    We have the Vermont pea soup over us even thought astrospheric says it should have been clear since 10am until around 5pm.       I’ve had one clear night in about 35 days.

I hope your skies are better!


Terri

On Dec 21, 2020, at 12:43 PM, Bill Long <bill@...> wrote:

On my ASI6200 it was so severe that I had one triad of the Gerd Neumann CTU maxed out and still didn't have enough to fix that portion of the chip. In my book that is way too much tilt and looks more like sloppy QC (more likely complete lack of QC) on the manufacturers behalf.

I'm eyeballing that Apx60 from Atik. They have a process they follow to get their chips flat when they build their cameras. I suspect QHY does something similar as those have less users experiencing terrible tilt. 

All 5 cameras I've owned from ZWO have had massive tilt problems. Buyer beware.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Terri Zittritsch <theresamarie11@...>
Sent: Monday, December 21, 2020 6:05 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M42 from my future observatory site
 
On Sun, Dec 20, 2020 at 11:02 AM, Bill Long wrote:
Significant tilt. The QHY600 may be better. Less users reporting issues with those.
Were you not able to adjust it out?   Can you say what significant is?


Terri


Re: M42 from my future observatory site

Bill Long
 

They canned CosMos due to Covid19 then when they announced their imx455 camera the name changed to Apx60.

https://www.atik-cameras.com/product/apx60/



From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Dominique <d.h.durand@...>
Sent: Monday, December 21, 2020 11:03 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M42 from my future observatory site
 
On Mon, Dec 21, 2020 at 11:48 AM, Bill Long wrote:
I'm eyeballing that Apx60 from Atik. They have a process they follow to get their chips flat when they build their cameras. I suspect QHY does something similar as those have less users experiencing terrible tilt. 
Apx60? We can order Atik CosMos Mono or color from dealers with this IMX455 sensor, but which are not on the Atik site? Apx60 therefore replaces the CosMos?


Re: M42 from my future observatory site

Dominique
 

On Mon, Dec 21, 2020 at 11:48 AM, Bill Long wrote:
I'm eyeballing that Apx60 from Atik. They have a process they follow to get their chips flat when they build their cameras. I suspect QHY does something similar as those have less users experiencing terrible tilt. 
Apx60? We can order Atik CosMos Mono or color from dealers with this IMX455 sensor, but which are not on the Atik site? Apx60 therefore replaces the CosMos?


Re: M42 from my future observatory site

Terri Zittritsch
 

Hi Bill, thanks for letting me know.. I wish I would have found this on-line before I purchased because  once I have my mind set… as soon as I saw the ad I pulled the trigger.  I did search a bit and noticed people talking about the need for a big (68mm) tilt ring  in front of AOG (which I have with the used package I found).   Almost entirely the discussions I found were about vignetting, and not really high tilt.  I do know there is the potential for light leakage around the 68mm tilt ring so need to fix that, but should not be a big issue.  The guy I purchased from did suggest the Gerd  Neumann CTU if I wanted a better tilt system for small amounts of tilt because the tilt ring is hard to adjust for small amounts of tilt.  I’ll keep my fingers crossed.   If I find it hard, I’ll get a Gerd Neumann CTU.    With all I have invested, donuts are unacceptable.  

I’d consider that much tilt, as your saying, a reason to return the camera.. wow.    Did you talk to Sam (I think that’s him at ZWO)?    Maybe he would have taken it back. 

I just purchased 2” Chroma filter set (3nm nb), but still waiting for the OIII which was just shipped.    I ordered my adapters from precise parts and will not get them till mid january.       

I wonder if there is any way for me to test this now?     Today I’m trying to wish the clouds away to get a view of the conjunction.    We have the Vermont pea soup over us even thought astrospheric says it should have been clear since 10am until around 5pm.       I’ve had one clear night in about 35 days.

I hope your skies are better!


Terri

On Dec 21, 2020, at 12:43 PM, Bill Long <bill@...> wrote:

On my ASI6200 it was so severe that I had one triad of the Gerd Neumann CTU maxed out and still didn't have enough to fix that portion of the chip. In my book that is way too much tilt and looks more like sloppy QC (more likely complete lack of QC) on the manufacturers behalf.

I'm eyeballing that Apx60 from Atik. They have a process they follow to get their chips flat when they build their cameras. I suspect QHY does something similar as those have less users experiencing terrible tilt. 

All 5 cameras I've owned from ZWO have had massive tilt problems. Buyer beware.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Terri Zittritsch <theresamarie11@...>
Sent: Monday, December 21, 2020 6:05 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M42 from my future observatory site
 
On Sun, Dec 20, 2020 at 11:02 AM, Bill Long wrote:
Significant tilt. The QHY600 may be better. Less users reporting issues with those.
Were you not able to adjust it out?   Can you say what significant is?


Terri


Re: Version P02-08 now available for GTOCP4 and GTOCP5 control boxes

 

Just to clarify. The new keypad software is not available for the GTOCP4. I apologize that I did not realize that this was a potential issue using P02-08 with the GTOCP4 and will have to update my documentation since this is a consideration for current users of keypad version 4.19.3.

 

Clear Skies,

 

Marj Christen

Astro-Physics, Inc

11250 Forest Hills Rd

Machesney Park, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Roland Christen via groups.io
Sent: Monday, December 21, 2020 12:32 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Version P02-08 now available for GTOCP4 and GTOCP5 control boxes

 

If you updated the CP4 to the latest version 02-08, we added an intermediate 200x button rate which changed the other rates. So you will need to load the new version of the keypad software into your keypad.

 

Roland

 

 

 

-----Original Message-----
From: Gary Steffens via groups.io <gwsteffens@...>
To: main@ap-gto.groups.io
Sent: Mon, Dec 21, 2020 12:16 pm
Subject: Re: [ap-gto] Version P02-08 now available for GTOCP4 and GTOCP5 control boxes

That's what I did. I set the button rate to 1200 but it slews slower that 1200 when using the buttons. I didn't confirm it but it probably slews at 600. :(

Gary


--
Roland Christen
Astro-Physics


Re: M42 from my future observatory site

Bill Long
 

Their OAG (QHY OAG-M) bolts directly to their CFW3 series wheel. Small prism on it (8mm x 8mm) but good enough for a Lodestar x2 chip.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Roland Christen via groups.io <chris1011@...>
Sent: Monday, December 21, 2020 10:05 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M42 from my future observatory site
 
That does not sound good.
The main problem i see with the QHY cameras is the lack of a good filter wheel with off-axis guider capability. (unless I'm missing something)

Rolando

-----Original Message-----
From: Bill Long <bill@...>
To: Terri Zittritsch <theresamarie11@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Dec 21, 2020 11:43 am
Subject: Re: [ap-gto] M42 from my future observatory site

On my ASI6200 it was so severe that I had one triad of the Gerd Neumann CTU maxed out and still didn't have enough to fix that portion of the chip. In my book that is way too much tilt and looks more like sloppy QC (more likely complete lack of QC) on the manufacturers behalf.

I'm eyeballing that Apx60 from Atik. They have a process they follow to get their chips flat when they build their cameras. I suspect QHY does something similar as those have less users experiencing terrible tilt. 

All 5 cameras I've owned from ZWO have had massive tilt problems. Buyer beware.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Terri Zittritsch <theresamarie11@...>
Sent: Monday, December 21, 2020 6:05 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M42 from my future observatory site
 
On Sun, Dec 20, 2020 at 11:02 AM, Bill Long wrote:
Significant tilt. The QHY600 may be better. Less users reporting issues with those.
Were you not able to adjust it out?   Can you say what significant is?


Terri

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Roland Christen
Astro-Physics

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