Date   

Factory PEC curve, how is it generated?

skester@...
 

This question is simply to satisfy my curiosity.  To create the factory installed PEC curve I assume each mount must be tested and track a star like source moving at sidereal rate for several worm gear cycles.  Doing this on a real star under the night sky would seem out of the question as it would require many clear nights and much time/effort to do for each mount produced.  That would seem to leave an artificial star that moves at a simulated sidereal rate on a test bench?  Or is there another method I haven't thought of, perhaps using encoders?

Thanks,
Scott
 


Re: First light for a new camera

Bill Long
 

Thats the 4.63um mode (14 bit) on the camera. Bin 1x1 on the camera is 2.3um pixels (but 12 bit). It is kind of like two cameras in one in a way. 

Specs:




From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Roland Christen via groups.io <chris1011@...>
Sent: Wednesday, February 10, 2021 10:39 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] First light for a new camera
 
Looks good. What is the pixel size binned 2x2?

Roland



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Wed, Feb 10, 2021 12:19 pm
Subject: Re: [ap-gto] First light for a new camera

Here is the final iteration:

https://www.astrobin.com/full/0ffdnz/E/

The full res version is viewable by clicking on the button at the upper right corner.  

I really like the amount of detail that can be seen in the Bok globules/dark nebula considering I was using a 4” refractor.
--
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

--
Roland Christen
Astro-Physics


Re: First light for a new camera

Roland Christen
 

Looks good. What is the pixel size binned 2x2?

Roland



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Wed, Feb 10, 2021 12:19 pm
Subject: Re: [ap-gto] First light for a new camera

Here is the final iteration:

https://www.astrobin.com/full/0ffdnz/E/

The full res version is viewable by clicking on the button at the upper right corner.  

I really like the amount of detail that can be seen in the Bok globules/dark nebula considering I was using a 4” refractor.
--
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

--
Roland Christen
Astro-Physics


Re: First light for a new camera

Dean Jacobsen
 

My trusty Mach2 kept me right on the mark.
--
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: First light for a new camera

 

wonderful detail!


On Wed, Feb 10, 2021 at 10:19 AM Dean Jacobsen <deanjacobsen@...> wrote:
Here is the final iteration:

https://www.astrobin.com/full/0ffdnz/E/

The full res version is viewable by clicking on the button at the upper right corner.  

I really like the amount of detail that can be seen in the Bok globules/dark nebula considering I was using a 4” refractor.
--
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



--
Brian 



Brian Valente


Re: First light for a new camera

Dean Jacobsen
 

Here is the final iteration:

https://www.astrobin.com/full/0ffdnz/E/

The full res version is viewable by clicking on the button at the upper right corner.  

I really like the amount of detail that can be seen in the Bok globules/dark nebula considering I was using a 4” refractor.
--
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: Counterweight Shaft Case

mdine1us
 

And, don’t forget 2.5 hour drives to a dark site!🥺

//Marty is mobile
Ad Astra

On Feb 9, 2021, at 20:59, Woody Schlom <woody_is@...> wrote:



Brian,

 

Oh yeah, you’re missing out on all the “fun” of portable observing – which includes sore muscles, barked knees and elbows, dust, insect bites, wild animals, dust, cold – and did I mention dust?

 

Woody

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Brian Valente
Sent: Tuesday, February 9, 2021 7:38 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Counterweight Shaft Case

 

with all these great ideas and enthusiasm for transporting the counterweight shaft, now i kind of feel like a sucker for just leaving mine on a pier and not moving it! :)


Re: Counterweight Shaft Case

Woody Schlom
 

Brian,

 

Oh yeah, you’re missing out on all the “fun” of portable observing – which includes sore muscles, barked knees and elbows, dust, insect bites, wild animals, dust, cold – and did I mention dust?

 

Woody

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Brian Valente
Sent: Tuesday, February 9, 2021 7:38 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Counterweight Shaft Case

 

with all these great ideas and enthusiasm for transporting the counterweight shaft, now i kind of feel like a sucker for just leaving mine on a pier and not moving it! :)


Re: Counterweight Shaft Case

dvjbaja
 

People use counterweights? 



Sent via the Samsung Galaxy Note9, an AT&T 5G Evolution capable smartphone


-------- Original message --------
From: Brian Valente <bvalente@...>
Date: 2/9/21 7:38 PM (GMT-08:00)
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Counterweight Shaft Case

with all these great ideas and enthusiasm for transporting the counterweight shaft, now i kind of feel like a sucker for just leaving mine on a pier and not moving it! :)


Re: Counterweight Shaft Case

Barry Megdal
 

I was referring to the idea of putting the shaft end cap onto the mount for storage.


Re: Counterweight Shaft Case

Joe Zeglinski
 

Brian,
 
    Everyone should also check that they have THAT special AP-provided  TEFLON washer/disk, on the threaded end of the shaft. Otherwise, you may find the steel seized  into the mount axis, very difficult to remove, especially in the cold. Don’t lose it.
The Teflon really helps, and now I wouldn’t attach the shaft without it.
 
Joe Z.
 

From: Brian Valente
Sent: Tuesday, February 9, 2021 10:38 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Counterweight Shaft Case
 
with all these great ideas and enthusiasm for transporting the counterweight shaft, now i kind of feel like a sucker for just leaving mine on a pier and not moving it! :)


Re: Counterweight Shaft Case

 

with all these great ideas and enthusiasm for transporting the counterweight shaft, now i kind of feel like a sucker for just leaving mine on a pier and not moving it! :)


Re: Counterweight Shaft Case

Barry Megdal
 

Great Idea!


Re: Counterweight Shaft Case

Worsel
 

Jeff

Your design looks like it also has a 'homing device'...so, if you leave the shaft and case at a site, it can be returned to you!  Brilliant!

Bryan


Re: Counterweight Shaft Case

Karen Christen
 

😆

 

-----Original Message-----
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Jeffc
Sent: Tuesday, February 9, 2021 8:21 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Counterweight Shaft Case

 

Here’s my awesome counterweight shaft transport case.  This is for an AP1200 CW shaft, but I also have a very similar one for the shorter AP1100 shaft.

The case you see here is specially designed to prevent rolling around in the vehicle, and has been reinforced in the appropriate areas of the structure.  

This has served me very very well since 2005 and has been to many star parties, public programs , and countless imaging sessions.  

I give it 4 stars rating… knocking off a star as the cover needs minor work with some gaffers tape.

 

 

 

 

 

 

 

 


--
Karen Christen
Astro-Physics


Re: Counterweight Shaft Case

Karen Christen
 

😆

 

-----Original Message-----
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Jeffc
Sent: Tuesday, February 9, 2021 8:21 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Counterweight Shaft Case

 

Here’s my awesome counterweight shaft transport case.  This is for an AP1200 CW shaft, but I also have a very similar one for the shorter AP1100 shaft.

The case you see here is specially designed to prevent rolling around in the vehicle, and has been reinforced in the appropriate areas of the structure.  

This has served me very very well since 2005 and has been to many star parties, public programs , and countless imaging sessions.  

I give it 4 stars rating… knocking off a star as the cover needs minor work with some gaffers tape.

 

 

 

 

 

 

 

 


--
Karen Christen
Astro-Physics


Re: Counterweight Shaft Case

Jeffc
 

Here’s my awesome counterweight shaft transport case. This is for an AP1200 CW shaft, but I also have a very similar one for the shorter AP1100 shaft.
The case you see here is specially designed to prevent rolling around in the vehicle, and has been reinforced in the appropriate areas of the structure.
This has served me very very well since 2005 and has been to many star parties, public programs , and countless imaging sessions.
I give it 4 stars rating… knocking off a star as the cover needs minor work with some gaffers tape.


Re: Counterweight Shaft Case

Stone, Jack G
 

Barry – Yes and the recommendation was to screw it into the RA assembly.

Which I did so one last item to worry about.

So I think everyone is in sync now.  And I never thought about that.  And the fear was I’m 200miles from home and leaving those small items behind – been there and done that.

 

Jack ~

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Barry Megdal
Sent: Tuesday, February 09, 2021 5:41 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Counterweight Shaft Case

 

I believe the question was about the safety stop that screws into the end of the shaft, and that is small and I keep it with other accessories.  The case does have a screw-on PVC pipe cap that seals the shaft inside.

 

  • Barry

 

Dr. Barry Megdal

 

President

Shb Instruments, Inc.

19215 Parthenia St.  Suite A

Northridge, CA 91324

www.shbinstruments.com

(818) 773-2000  (818)773-2005 fax

bmegdal@...

 

Faculty (retired)

Dept. of Electrical Engineering

Caltech

 


Re: Counterweight Shaft Case

Barry Megdal
 

I believe the question was about the safety stop that screws into the end of the shaft, and that is small and I keep it with other accessories.  The case does have a screw-on PVC pipe cap that seals the shaft inside.

 

-        Barry

 

Dr. Barry Megdal

 

President

Shb Instruments, Inc.

19215 Parthenia St.  Suite A

Northridge, CA 91324

www.shbinstruments.com

(818) 773-2000  (818)773-2005 fax

bmegdal@...

 

Faculty (retired)

Dept. of Electrical Engineering

Caltech

 


Re: Counterweight Shaft Case

Stone, Jack G
 

Aha moment!!! Would have never thought of that – never leave home without it 😊

Yeap nicely done Harry.

 

Jack ~

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Harry Horlings via groups.io
Sent: Tuesday, February 09, 2021 2:47 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Counterweight Shaft Case

 

Hi Jack,

No one mentioned it here, but I screw the counterweight end cap into the end of the RA axis where the counterweight shaft screws into. :)

Harry

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