## Re: [ccd-newastro] Question for Ron Wodaski

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• Thanks Adam for the explanation. I guess I could have sat down with my calculator and figured it out, but it s so much easier using Ron s calculator. LOL.
Message 1 of 13 , Feb 3, 2007
Thanks Adam for the explanation. I guess I could have sat down with my
calculator and figured it out, but it's so much easier using Ron's
calculator. LOL.

Clear skies and calm winds,

"Dollar" Bill Logan,
Director, Chief Astronomer and Artist
Robert Burnham Jr. Memorial Observatory
Located somewhere near Rattlesnake Gulch, St. Johns, Arizona
NexStar 11 GPS; Orion 80ST; Orion StarShoot Autoguider/imager, Canon 350D
Imager

Life goal: To be the person my dog thinks I am.

----- Original Message -----
To: <ccd-newastro@yahoogroups.com>
Sent: Friday, February 02, 2007 8:05 PM
Subject: Re: [ccd-newastro] Question for Ron Wodaski

>
> Hi Bill,
>
> CCD Calculators are fantastic since they shorten the amount of time
> youneed to spending determining some value. However, if you have to
> waitfor the answer... then their efficiency is greatly decreased.
>
> To that end, you can figure out the answer to your question veryquickly.
> The only thing you need to remember is a special number206,265 (it is the
> number of acrseconds in a radian). The plate scale(which is what you want
> to compute) is equal to 206,265 divided by thefocal length of your system.
> That's it...the whole formula.
>
> So from the values below the plate scale of this 20inch telescope (in mm)
> is 206265"/3454mm = 59.72 arcseconds per mm.
> But you probably want the answer in arcseconds per PIXEL... so you needto
> know the physical size of an EOS 350D pixel. The answer is 6.4microns
> (0.0064mm). So just multiply your answer above by this valueand you have
> how many arcseconds a single pixel is: 59.72"/mm*.0064mm=0.38" .
>
> So there are 0.38 arcseonds per pixel. Now you know the field of view.
> Just multiply the number of pixels this camera has (3456x2304) and you
> will get the field of view. I did this, and converted to arcminutes you
> will have a 22'x15' field of view.
>
> This took longer to explain/type than to do. Just punching the numbers on
> the calculator took 30 seconds (maybe).
>
>
>
>
>
>
> ------------------------------------------------------------
> ngc1535@...
> http://caelumobservatory.com/
> Caelum videre iussit, et erectos ad sidera tollere vultus.
> He bid them look at the sky and lift their faces to the stars.
> --Ovid, Metamorphoses 1. 85-8
> ------------------------------------------------------------
>
>
>
> -----Original Message-----
> From: Bill Logan [mailto:wb9sat@...]
> Sent: Friday, February 2, 2007 06:47 PM
> To: ccd-newastro@yahoogroups.com
> Subject: [ccd-newastro] Question for Ron Wodaski
>
> Hi Ron,
>
> I really love your CCD calculator. I am toying with the idea of buying
> the new PlaneWave Instruments CDK 20 telescope
> (http://tech.groups.yahoo.com/group/planewave_CDK20_telescope) and
> wonder if I can add this telescope to the calculator? If not, could
> you add it to the calculator? Here are some specifications:
>
> Aperture: 20-inch (510 mm) Dall-Kirkham Astrograph
> focal length: 3,454 mm
> focal ratio: f/6.8
>
> Although it is designed for large CCD camera, It would be neat to see
> what kind of scale I could get with my Canon EOS 350D.
>
> If you need more information on this new telescope, here's their
> website:
> www.planewaveinstruments.com
>
> Clear skies,
> Bill
>
>
>
>
>
> ------------------------------------------------------------
>
> ngc1535@...
> http://caelumobservatory.com/
> Caelum videre iussit, et erectos ad sidera tollere vultus.
> He bid them look at the sky and lift their faces to the stars.
> --Ovid, Metamorphoses 1. 85-8
> ------------------------------------------------------------
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG.
> Version: 7.5.441 / Virus Database: 268.17.21/665 - Release Date: 2/2/2007
> 11:39 PM
>
>

--
No virus found in this outgoing message.
Checked by AVG.
Version: 7.5.441 / Virus Database: 268.17.21/665 - Release Date: 2/2/2007 11:39 PM
• Hi Bill, It s very simple to add any scope or camera to Ron s calculator with the ADD button. Just enter the specs or you can edit the camera_data.dat file
Message 2 of 13 , Feb 3, 2007
Hi Bill,
It's very simple to add any scope or camera to Ron's calculator
with the "ADD" button. Just enter the specs or you can edit the
camera_data.dat file with notepad. It's a pretty simple format, even
I can do it :)
Bill

--- In ccd-newastro@yahoogroups.com, "Bill Logan" <wb9sat@...> wrote:
>
> Hi Ron,
>
> I really love your CCD calculator. I am toying with the idea of
> the new PlaneWave Instruments CDK 20 telescope
> (http://tech.groups.yahoo.com/group/planewave_CDK20_telescope) and
> wonder if I can add this telescope to the calculator? If not,
could
> you add it to the calculator? Here are some specifications:
>
> Aperture: 20-inch (510 mm) Dall-Kirkham Astrograph
> focal length: 3,454 mm
> focal ratio: f/6.8
>
> Although it is designed for large CCD camera, It would be neat to
see
> what kind of scale I could get with my Canon EOS 350D.
>
> If you need more information on this new telescope, here's their
> website:
> www.planewaveinstruments.com
>
>
> Clear skies,
> Bill
>
• Bill, I have to agree with you. For those of us that don t have Pi memorized out to the 13th place, the CCD calclator is easer. STU ... my
Message 3 of 13 , Feb 3, 2007
Bill,
I have to agree with you. For those of us that don't have Pi
memorized out to the 13th place, the CCD calclator is easer.

STU

--- In ccd-newastro@yahoogroups.com, "Bill Logan" <wb9sat@...> wrote:
>
> Thanks Adam for the explanation. I guess I could have sat down with
my
> calculator and figured it out, but it's so much easier using Ron's
> calculator. LOL.
>
> Clear skies and calm winds,
>
> "Dollar" Bill Logan,
• Thanks Bill, After I posted the message, I discovered that I could add the scope. Doh! Clear skies, Dollar Bill Logan Director and Chief Astronomer and Artist
Message 4 of 13 , Feb 3, 2007
Thanks Bill,

After I posted the message, I discovered that I could add the scope. Doh!

Clear skies,

Dollar Bill Logan
Director and Chief Astronomer and Artist
Robert Burnham Jr. Memorial Observatory
Located somewhere near Rattlesnake Gulch, St. Johns, Arizona
NexStar 11 GPS, CeleStar 8 and Orion StarShoot CCD camera

Goal in life: To be the person my dog thinks I am.

----- Original Message -----
From: "billkny" <billkny@...>
To: <ccd-newastro@yahoogroups.com>
Sent: Saturday, February 03, 2007 10:39 AM
Subject: [ccd-newastro] Re: Question for Ron Wodaski

> Hi Bill,
> It's very simple to add any scope or camera to Ron's calculator
> with the "ADD" button. Just enter the specs or you can edit the
> camera_data.dat file with notepad. It's a pretty simple format, even
> I can do it :)
> Bill
>
> --- In ccd-newastro@yahoogroups.com, "Bill Logan" <wb9sat@...> wrote:
>>
>> Hi Ron,
>>
>> I really love your CCD calculator. I am toying with the idea of
>> the new PlaneWave Instruments CDK 20 telescope
>> (http://tech.groups.yahoo.com/group/planewave_CDK20_telescope) and
>> wonder if I can add this telescope to the calculator? If not,
> could
>> you add it to the calculator? Here are some specifications:
>>
>> Aperture: 20-inch (510 mm) Dall-Kirkham Astrograph
>> focal length: 3,454 mm
>> focal ratio: f/6.8
>>
>> Although it is designed for large CCD camera, It would be neat to
> see
>> what kind of scale I could get with my Canon EOS 350D.
>>
>> If you need more information on this new telescope, here's their
>> website:
>> www.planewaveinstruments.com
>>
>>
>> Clear skies,
>> Bill
>>
>
>
>
>
>
>
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.432 / Virus Database: 268.17.22/666 - Release Date: 2/3/2007
> 3:31 PM
>
>
• Hello Group, Our new observatory structure is completed, but the recent snow has prevented me from installing much equipment so far. However, on a recent
Message 5 of 13 , Feb 3, 2007
Hello Group,

Our new observatory structure is completed, but the recent snow has prevented me from installing much equipment so far. However, on a recent visit to the site (last 100' by foot) I managed to install a DSL Router and a simple fixed focus indoor IP camera that is pointed out the south window of the control room looking toward New Mexico Skies across the valley.

Although the quality of the image is on the low-end, it is a nice vista that I thought some might be interested in seeing. Access to the camera is at the following link:

http://216.167.159.236:60003/

User Name: guest

To update the image, refresh your Browser.

Hopefully the weather will improve in a few weeks so I can finish the installation of observatory equipment, including a high resolution outdoor IP camera for a nice mosaic from the observatory site.

Regards,
Mike Sherick
JMSM Obsevatory
Mayhill, NM

---------------------------------
8:00? 8:25? 8:40? Find a flick in no time
with theYahoo! Search movie showtime shortcut.

[Non-text portions of this message have been removed]
• Well... someday someone might thank me. That number, 206,265 is also, by definition, the number of astronomical units in a parsec. The uses of the number are
Message 6 of 13 , Feb 3, 2007
Well... someday someone might thank me. That number, 206,265 is also, by definition, the number of astronomical units in a parsec. The uses of the number are really wonderful and I think it rolls of the tongue. <g>

-----Original Message-----
From: sforster12 [mailto:SHFORSTER1@...]
Sent: Saturday, February 3, 2007 10:49 AM
To: ccd-newastro@yahoogroups.com
Subject: [ccd-newastro] Re: Question for Ron Wodaski

Bill,
I have to agree with you. For those of us that don't have Pi
memorized out to the 13th place, the CCD calclator is easer.

STU

--- In ccd-newastro@yahoogroups.com, "Bill Logan" <wb9sat@...> wrote:
>
> Thanks Adam for the explanation. I guess I could have sat down with
my
> calculator and figured it out, but it's so much easier using Ron's
> calculator. LOL.
>
> Clear skies and calm winds,
>
> "Dollar" Bill Logan,

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

ngc1535@...
http://caelumobservatory.com/
Caelum videre iussit, et erectos ad sidera tollere vultus.
He bid them look at the sky and lift their faces to the stars.
--Ovid, Metamorphoses 1. 85-8
------------------------------------------------------------

[Non-text portions of this message have been removed]
• Thank You Adam...... For making some sense to the mathmatics involved in imaging...: ) Bob Adam Block wrote: Well... someday
Message 7 of 13 , Feb 3, 2007
Thank You Adam...... For making some sense to the mathmatics involved in imaging...:>)

Bob

Well... someday someone might thank me. That number, 206,265 is also, by definition, the number of astronomical units in a parsec. The uses of the number are really wonderful and I think it rolls of the tongue. <g>

-----Original Message-----
From: sforster12 [mailto:SHFORSTER1@...]
Sent: Saturday, February 3, 2007 10:49 AM
To: ccd-newastro@yahoogroups.com
Subject: [ccd-newastro] Re: Question for Ron Wodaski

Bill,
I have to agree with you. For those of us that don't have Pi
memorized out to the 13th place, the CCD calclator is easer.

STU

--- In ccd-newastro@yahoogroups.com, "Bill Logan" <wb9sat@...> wrote:
>
> Thanks Adam for the explanation. I guess I could have sat down with
my
> calculator and figured it out, but it's so much easier using Ron's
> calculator. LOL.
>
> Clear skies and calm winds,
>
> "Dollar" Bill Logan,

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

ngc1535@...
http://caelumobservatory.com/
Caelum videre iussit, et erectos ad sidera tollere vultus.
He bid them look at the sky and lift their faces to the stars.
--Ovid, Metamorphoses 1. 85-8
----------------------------------------------------------

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

---------------------------------
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[Non-text portions of this message have been removed]
• Hi Mike, The view is great! Glad you posted this vista as it shows the beauty of the snow that occurred a few days ago. Not great for imaging or testing,
Message 8 of 13 , Feb 3, 2007
Hi Mike,
The view is great! Glad you posted this "vista" as it shows the
beauty of the snow that occurred a few days ago. Not great for
imaging or testing, but worth seeing!!

Regards,
Randy

http://rc20.stonehenge-obs.com

--- In ccd-newastro@yahoogroups.com, Michael Sherick
<michaelsherick@...> wrote:
>
> Hello Group,
>
> Our new observatory structure is completed, but the recent snow
has prevented me from installing much equipment so far. However, on
a recent visit to the site (last 100' by foot) I managed to install
a DSL Router and a simple fixed focus indoor IP camera that is
pointed out the south window of the control room looking toward New
Mexico Skies across the valley.
>
> Although the quality of the image is on the low-end, it is a
nice vista that I thought some might be interested in seeing.
>
> http://216.167.159.236:60003/
>
> User Name: guest
>
> To update the image, refresh your Browser.
>
> Hopefully the weather will improve in a few weeks so I can
finish the installation of observatory equipment, including a high
resolution outdoor IP camera for a nice mosaic from the observatory
site.
>
> Regards,
> Mike Sherick
> JMSM Obsevatory
> Mayhill, NM
>
>
>
>
> ---------------------------------
> 8:00? 8:25? 8:40? Find a flick in no time
> with theYahoo! Search movie showtime shortcut.
>
> [Non-text portions of this message have been removed]
>
• ... also, by definition, the number of astronomical units in a parsec. The uses of the number are really wonderful and I think it rolls of the tongue. ...
Message 9 of 13 , Feb 3, 2007
--- In ccd-newastro@yahoogroups.com, "Adam Block" <ngc1535@...> wrote:
>
> Well... someday someone might thank me. That number, 206,265 is
also, by definition, the number of astronomical units in a parsec.
The uses of the number are really wonderful and I think it rolls of
the tongue. <g>

Only if you're an African chameleon with a three foot long tongue
does it easily roll.

has been cut and pasted into my optical formuae file.

STU

>
> -----Original Message-----
> From: sforster12 [mailto:SHFORSTER1@...]
> Sent: Saturday, February 3, 2007 10:49 AM
> To: ccd-newastro@yahoogroups.com
> Subject: [ccd-newastro] Re: Question for Ron Wodaski
>
> Bill,
> I have to agree with you. For those of us that don't have Pi
> memorized out to the 13th place, the CCD calclator is easer.
>
> STU
>
> --- In ccd-newastro@yahoogroups.com, "Bill Logan" <wb9sat@> wrote:
> >
> > Thanks Adam for the explanation. I guess I could have sat down
with
> my
> > calculator and figured it out, but it's so much easier using
Ron's
> > calculator. LOL.
> >
> > Clear skies and calm winds,
> >
> > "Dollar" Bill Logan,
>
>
>
>
>
>
> ------------------------------------------------------------
>
> ngc1535@...
> http://caelumobservatory.com/
> Caelum videre iussit, et erectos ad sidera tollere vultus.
> He bid them look at the sky and lift their faces to the stars.
> --Ovid, Metamorphoses 1. 85-8
> ------------------------------------------------------------
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
• Hi Adam, I will certainly thank you for presenting the math/equation to the group. I do believe that Ron s program allows for visual determination of many
Message 10 of 13 , Feb 3, 2007
I will certainly thank you for presenting the math/equation to the
group. I do believe that Ron's program allows for "visual"
determination of many particular objects within a given field of
view...and this can't be overlooked. But, knowing the math behind
determining FOV (or arcsec/pix...and total FOV horizontally and
vertically) for a particular setup is certainly something everyone
should try to understand IMHO. Of course, Ron set up his program to
allow for new configurations and simplicity...this, also, can not be
overlooked. <G>

Thanks and regards,

Randy Nulman
http://rc20.stonehenge-obs.com

--- In ccd-newastro@yahoogroups.com, "Adam Block" <ngc1535@...>
wrote:
>
> Well... someday someone might thank me. That number, 206,265 is
also, by definition, the number of astronomical units in a parsec.
The uses of the number are really wonderful and I think it rolls of
the tongue. <g>
>
> -----Original Message-----
> From: sforster12 [mailto:SHFORSTER1@...]
> Sent: Saturday, February 3, 2007 10:49 AM
> To: ccd-newastro@yahoogroups.com
> Subject: [ccd-newastro] Re: Question for Ron Wodaski
>
> Bill,
> I have to agree with you. For those of us that don't have Pi
> memorized out to the 13th place, the CCD calclator is easer.
>
> STU
>
> --- In ccd-newastro@yahoogroups.com, "Bill Logan" <wb9sat@> wrote:
> >
> > Thanks Adam for the explanation. I guess I could have sat down
with
> my
> > calculator and figured it out, but it's so much easier using
Ron's
> > calculator. LOL.
> >
> > Clear skies and calm winds,
> >
> > "Dollar" Bill Logan,
>
>
>
>
>
>
> ------------------------------------------------------------
>
> ngc1535@...
> http://caelumobservatory.com/
> Caelum videre iussit, et erectos ad sidera tollere vultus.
> He bid them look at the sky and lift their faces to the stars.
> --Ovid, Metamorphoses 1. 85-8
> ------------------------------------------------------------
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
• Hi Adam, I want to thank you for pointing out some of the advantages of using some basic mathematics to clarify relationships between different systems in
Message 11 of 13 , Feb 3, 2007

I want to thank you for pointing out some of the advantages of using some
basic mathematics to clarify relationships between different systems in
common use in armature astronomy. We need to be reminded of the value of
having a basic understanding of these relationships which can only enrich
our hobby. We are prone to becoming to reliant on "tools" that do the
thinking for us. I for one will use the information you have provided
extensively in the future.

Sincerely,

Luke.

-----Original Message-----
From: ccd-newastro@yahoogroups.com [mailto:ccd-newastro@yahoogroups.com] On
Sent: Sunday, 4 February 2007 8:54 AM
To: ccd-newastro@yahoogroups.com
Subject: Re: [ccd-newastro] Re: Question for Ron Wodaski

Well... someday someone might thank me. That number, 206,265 is also, by
definition, the number of astronomical units in a parsec. The uses of the
number are really wonderful and I think it rolls of the tongue. <g>

-----Original Message-----
From: sforster12 [mailto:SHFORSTER1@aol. <mailto:SHFORSTER1%40aol.com> com]
Sent: Saturday, February 3, 2007 10:49 AM
To: ccd-newastro@ <mailto:ccd-newastro%40yahoogroups.com> yahoogroups.com
Subject: [ccd-newastro] Re: Question for Ron Wodaski

Bill,
I have to agree with you. For those of us that don't have Pi
memorized out to the 13th place, the CCD calclator is easer.

STU

--- In ccd-newastro@ <mailto:ccd-newastro%40yahoogroups.com>
yahoogroups.com, "Bill Logan" <wb9sat@...> wrote:
>
> Thanks Adam for the explanation. I guess I could have sat down with
my
> calculator and figured it out, but it's so much easier using Ron's
> calculator. LOL.
>
> Clear skies and calm winds,
>
> "Dollar" Bill Logan,

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

ngc1535@caelumobser <mailto:ngc1535%40caelumobservatory.com> vatory.com
http://caelumobserv <http://caelumobservatory.com/> atory.com/
Caelum videre iussit, et erectos ad sidera tollere vultus.
He bid them look at the sky and lift their faces to the stars.
--Ovid, Metamorphoses 1. 85-8
----------------------------------------------------------

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

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