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Re: Polar Align Assist help


Oct 27, 2005

 


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

#27594 Oct 27, 2005

Sorry about cross post from Gemini group, but I did not get a

response there.



I used PAA for the first time last night. I have used PAC with my G-

11 Gemini succesfully before when I new I was close to alignment, but

now I have a new scope and cant use a polar scope to get close, so I

have used compass etc.. to get close and now want to use PAA to get

closer before using PAC.



I notice that the list of stars you can choose is very limited which

means the chances of one of those stars being near east or west

horizon and dec 0 are almost nill.



How close do the stars have to be to dec 0 and east or west and also

near merdian for this to work ?



I also got a little confused with the process. You suppose to do an

initial goto bright star and then sync and then choose PAA select 2

stars and then adjust using alt and az knobs of the scope.



The instructions are to centre the star. So if slewing to object on

east or west then you use AZ control knob to centre the star. What is

meant by centering the star ? I am using a ccd camera with xhairs

displayed in CCD soft. If using only azimuth know I can centre the

star vertically (y axis) in the ccd chip, but its not at the centre

of the chip. After centering with AZ knob you then are supposed to

centre the object using hand paddle. I assume this now means just

centering in one axis (X axis), because you all ready centred it in Y

axis using AZ knob.



I did this iterative process several times using 2 stars and

eventually the star would end up centred vertically (y axis) every

time on both slews, but it would never by be centred in both X and Y

is this normal ? Maybe I am not sure what is meant by centre the

object.



Best Regards

Chris



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

#27597 Oct 27, 2005

Hi Chris,



You can only center the star using both adjusting possibilities and

those are the elevation knob as well as the azimuth knob.



No other way to do that. I hope this answers your question



When you use PAC you also use both adjusting possibilities.



IMO the function PAA is just a subproduct from PAC.



I see more sense in using PAC rather then PAA.



By the way I have never used PAA so far :-)



regards Rainer



--- In Losmandy_users@yahoogroups.com, "Chris" vman_69au@y...> wrote:

>

> Sorry about cross post from Gemini group, but I did not get a

> response there.

>

> I used PAA for the first time last night. I have used PAC with my G-

> 11 Gemini succesfully before when I new I was close to alignment,

but

> now I have a new scope and cant use a polar scope to get close, so

I

> have used compass etc.. to get close and now want to use PAA to get

> closer before using PAC.

>

> I notice that the list of stars you can choose is very limited which

> means the chances of one of those stars being near east or west

> horizon and dec 0 are almost nill.

>

> How close do the stars have to be to dec 0 and east or west and also

> near merdian for this to work ?

>

> I also got a little confused with the process. You suppose to do an

> initial goto bright star and then sync and then choose PAA select 2

> stars and then adjust using alt and az knobs of the scope.

>

> The instructions are to centre the star. So if slewing to object on

> east or west then you use AZ control knob to centre the star. What

is

> meant by centering the star ? I am using a ccd camera with xhairs

> displayed in CCD soft. If using only azimuth know I can centre the

> star vertically (y axis) in the ccd chip, but its not at the centre

> of the chip. After centering with AZ knob you then are supposed to

> centre the object using hand paddle. I assume this now means just

> centering in one axis (X axis), because you all ready centred it in

Y

> axis using AZ knob.

>

> I did this iterative process several times using 2 stars and

> eventually the star would end up centred vertically (y axis) every

> time on both slews, but it would never by be centred in both X and Y

> is this normal ? Maybe I am not sure what is meant by centre the

> object.

>

> Best Regards

> Chris

>



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

#27598 Oct 27, 2005

now I have a new scope and cant use a polar scope to get close, so I

> have used compass etc.. to get close and now want to use PAA to get

> closer before using PAC.

>





How comes that you can not use your poalr scope anymore with the new

scope ?



I do not understand that ? What is now in your setup that the

polarscope can not be used anymore ?



regards Rainer



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

#27599 Oct 27, 2005

--- Rainer rsbfoto@...> wrote: > I see more sense in using PAC rather then PAA.

>

> By the way I have never used PAA so far :-)



Me neither. I'd be interested in hearing if PAA is a useful supplement

to PAC.



Alan



SCT Astrophotography: www.pbase.com/avoetsch/astrophotography

FS-102 G-11/Gemini: www.pbase.com/avoetsch12952/tak_fs102

& www.pbase.com/avoetsch12952/fs102

& www.pbase.com/avoetsch12952/takpf









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

Yahoo! Mail - PC Magazine Editors' Choice 2005

mail.yahoo.com







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

#27600 Oct 27, 2005

My new pier I have had made is about 4" lower than G-11 tripod. My

polar scope used to JUST be able to se eover the edge of the

observatory. Now that its 4" lower i just see the wall :-(



Hence then need for PAA before doing PAC.



Regards

Chris --- In Losmandy_users@yahoogroups.com, "Rainer" rsbfoto@r...> wrote:

>

>

> > now I have a new scope and cant use a polar scope to get close, so

I

> > have used compass etc.. to get close and now want to use PAA to get

> > closer before using PAC.

> >

>

>

> How comes that you can not use your poalr scope anymore with the new

> scope ?

>

> I do not understand that ? What is now in your setup that the

> polarscope can not be used anymore ?

>

> regards Rainer

>



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