Re: [Coronado_PST] Re: confused over image orientation


Aug 4, 2007

 


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

#5620 Aug 4, 2007

Hi, Mike. If you were to look at the Sun with the naked eye at noon,

(of course with a proper filter), then the west side of the image is

to your right (in the northern hemisphere), the east side to your

left, north side towards the north celestial pole. The Sun rotates

from east to west side.



When you view the Sun through an eyepiece, or photograph it with a

camera, the image orientation depends on the optical setup. If you

have an equatorial mount, than the rules for finding east or west,

north or south are easy. If you move the telescope around the

declination axis towards the north pole, the south side of the image

goes out of the field of view first. Similarly, if you move the

telescope towards the east (rotating about the RA axis), the west limb

goes out of the field of view first. The way I have my DSI Pro II

camera mounted to my PST requires that I rotate the image by 180

degrees counterclockwise during processing, to place north at the top,

east to the left.



I hope this helps.



Harold Leinbach



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

#5634 Aug 9, 2007

Harold,



thanks for the info - confusion solved !!





Mike



--- In Coronado_PST@yahoogroups.com, "haroldleinbach" hleinbach@...>

wrote: >

> Hi, Mike. If you were to look at the Sun with the naked eye at

noon, > (of course with a proper filter), then the west side of the image is

> to your right (in the northern hemisphere), the east side to your

> left, north side towards the north celestial pole. The Sun rotates

> from east to west side.

>

> When you view the Sun through an eyepiece, or photograph it with a

> camera, the image orientation depends on the optical setup. If you

> have an equatorial mount, than the rules for finding east or west,

> north or south are easy. If you move the telescope around the

> declination axis towards the north pole, the south side of the image

> goes out of the field of view first. Similarly, if you move the

> telescope towards the east (rotating about the RA axis), the west

limb > goes out of the field of view first. The way I have my DSI Pro II

> camera mounted to my PST requires that I rotate the image by 180

> degrees counterclockwise during processing, to place north at the

top, > east to the left.

>

> I hope this helps.

>

> Harold Leinbach

>



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

#5635 Aug 9, 2007

Great answer Harold.



I would be grateful if you would say how you have achieved focus on your PST

with the DSI II.



many thanks

Mick

On 04/08/07, haroldleinbach hleinbach@...> wrote:

>

> Hi, Mike. If you were to look at the Sun with the naked eye at noon,

> (of course with a proper filter), then the west side of the image is

> to your right (in the northern hemisphere), the east side to your

> left, north side towards the north celestial pole. The Sun rotates

> from east to west side.

>

> When you view the Sun through an eyepiece, or photograph it with a

> camera, the image orientation depends on the optical setup. If you

> have an equatorial mount, than the rules for finding east or west,

> north or south are easy. If you move the telescope around the

> declination axis towards the north pole, the south side of the image

> goes out of the field of view first. Similarly, if you move the

> telescope towards the east (rotating about the RA axis), the west limb

> goes out of the field of view first. The way I have my DSI Pro II

> camera mounted to my PST requires that I rotate the image by 180

> degrees counterclockwise during processing, to place north at the top,

> east to the left.

>

> I hope this helps.

>

> Harold Leinbach

>

>

>





[Non-text portions of this message have been removed]



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

#5637 Aug 10, 2007

A small correction - the front of the camera body has a small square

hole, which exposes the face of the ccd. The adapter plate is

fastened to the camera body with four small screws.





--- In Coronado_PST@yahoogroups.com, "haroldleinbach" hleinbach@...>

wrote: >

> Here is my setup with the DSI Pro II on the PST, Mick.

>

> The face of the camera has a threaded hole. I bought a T-thread

> "Adapter Plate for DSI Pro and DSI Pro II..." from ScopeStuff.com

> #DSIF $37.00, and attached it to the camera. The camera came with a 1

> 1/4" adapter tube, which I did not use. Rather than being a straight 1

> 1/4" tube, it is a slightly smaller tube, with a 1 1/4" flange at the

> top, which the clamping screw on the PST just barely caught. I had an

> adapter which I used instead. With this adapter screwed into the

> ScopeStuff plate, the distance of the end of the 1 1/4" adapter tube

> is about 1 5/8 inches from the front of the camera. I then screwed the

> lens from a Coronado Cemex 2x barlow into the 1 1/4" adapter tube.

> The total length from the camera front to the front of the Barlow lens

> is about 2 1/16 inches. When the camera is completely inserted into

> the PST, with the front of the Barlow cell touching the holder for the

> 5 mm red filter, the camera is nicely within the focusing range of the

> PST.

>

> The DSI Pro II works well for me - the fact that I can use 0.002 sec

> exposures with the double-stacked PST saves the day in our generally

> very poor seeing conditions. The only drawback I have noticed with the

> DSI Pro II is that it is an interlaced CD camera. The interlacing is

> very obvious with the short exposures. I process with Picture Window

> Pro, which has an deinterlace function, but probably not an ideal one.

>

> Regards,

>

> Harold Leinbach

>

>

> --- In Coronado_PST@yahoogroups.com, "Mick Scutt" mick.scutt@> wrote:

> >

> > Great answer Harold.

> >

> > I would be grateful if you would say how you have achieved focus on

> your PST

> > with the DSI II.

> >

> > many thanks

> > Mick

> >

>







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

#5638 Aug 10, 2007

I would love to see some pix of this setup (exploded view too) as well as some actual pix taken thru the setup. Would

this work with a Max40 or 60?



Terry



The road to success is always under construction... ----- Original Message -----

From: "haroldleinbach" hleinbach@...>

To: Coronado_PST@yahoogroups.com>

Sent: Friday, August 10, 2007 1:16 PM

Subject: [Coronado_PST] Re: confused over image orientation





> Here is my setup with the DSI Pro II on the PST, Mick.

>

> The face of the camera has a threaded hole. I bought a T-thread

> "Adapter Plate for DSI Pro and DSI Pro II..." from ScopeStuff.com

> #DSIF $37.00, and attached it to the camera. The camera came with a 1

> 1/4" adapter tube, which I did not use. Rather than being a straight 1

> 1/4" tube, it is a slightly smaller tube, with a 1 1/4" flange at the

> top, which the clamping screw on the PST just barely caught. I had an

> adapter which I used instead. With this adapter screwed into the

> ScopeStuff plate, the distance of the end of the 1 1/4" adapter tube

> is about 1 5/8 inches from the front of the camera. I then screwed the

> lens from a Coronado Cemex 2x barlow into the 1 1/4" adapter tube.

> The total length from the camera front to the front of the Barlow lens

> is about 2 1/16 inches. When the camera is completely inserted into

> the PST, with the front of the Barlow cell touching the holder for the

> 5 mm red filter, the camera is nicely within the focusing range of the

> PST.

>

> The DSI Pro II works well for me - the fact that I can use 0.002 sec

> exposures with the double-stacked PST saves the day in our generally

> very poor seeing conditions. The only drawback I have noticed with the

> DSI Pro II is that it is an interlaced CD camera. The interlacing is

> very obvious with the short exposures. I process with Picture Window

> Pro, which has an deinterlace function, but probably not an ideal one.

>

> Regards,

>

> Harold Leinbach

>

>

> --- In Coronado_PST@yahoogroups.com, "Mick Scutt" mick.scutt@...> wrote:

>>

>> Great answer Harold.

>>

>> I would be grateful if you would say how you have achieved focus on

> your PST

>> with the DSI II.

>>

>> many thanks

>> Mick

>>

>

>

>

>

>

>

> Yahoo! Groups Links

>

>

>

>



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

#5649 Aug 12, 2007

Harold, Many thanks for taking the time to explain your setup. I shall be

trying the DSI again armed with that info.

kind regards and good seeing

Mick

On 11/08/07, haroldleinbach hleinbach@...> wrote:

>

> A small correction - the front of the camera body has a small square

> hole, which exposes the face of the ccd. The adapter plate is

> fastened to the camera body with four small screws.

>

> --- In Coronado_PST@yahoogroups.com Coronado_PST%40yahoogroups.com>,

> "haroldleinbach" hleinbach@...>

>

> wrote:

> >

> > Here is my setup with the DSI Pro II on the PST, Mick.

> >

> > The face of the camera has a threaded hole. I bought a T-thread

> > "Adapter Plate for DSI Pro and DSI Pro II..." from ScopeStuff.com

> > #DSIF $37.00, and attached it to the camera. The camera came with a 1

> > 1/4" adapter tube, which I did not use. Rather than being a straight 1

> > 1/4" tube, it is a slightly smaller tube, with a 1 1/4" flange at the

> > top, which the clamping screw on the PST just barely caught. I had an

> > adapter which I used instead. With this adapter screwed into the

> > ScopeStuff plate, the distance of the end of the 1 1/4" adapter tube

> > is about 1 5/8 inches from the front of the camera. I then screwed the

> > lens from a Coronado Cemex 2x barlow into the 1 1/4" adapter tube.

> > The total length from the camera front to the front of the Barlow lens

> > is about 2 1/16 inches. When the camera is completely inserted into

> > the PST, with the front of the Barlow cell touching the holder for the

> > 5 mm red filter, the camera is nicely within the focusing range of the

> > PST.

> >

> > The DSI Pro II works well for me - the fact that I can use 0.002 sec

> > exposures with the double-stacked PST saves the day in our generally

> > very poor seeing conditions. The only drawback I have noticed with the

> > DSI Pro II is that it is an interlaced CD camera. The interlacing is

> > very obvious with the short exposures. I process with Picture Window

> > Pro, which has an deinterlace function, but probably not an ideal one.

> >

> > Regards,

> >

> > Harold Leinbach

> >

> >

> > --- In Coronado_PST@yahoogroups.com Coronado_PST%40yahoogroups.com>,

> "Mick Scutt" mick.scutt@> wrote:

> > >

> > > Great answer Harold.

> > >

> > > I would be grateful if you would say how you have achieved focus on

> > your PST

> > > with the DSI II.

> > >

> > > many thanks

> > > Mick

> > >

> >

>

>

>





[Non-text portions of this message have been removed]






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