Date   

Re: comet guiding

Geert Vandenbulcke <geert.vdbulcke@...>
 

Just read about this, yes this might work I think, thanks,

Geert

_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
drgert1
Sent: woensdag 7 februari 2007 8:37
To: ap-gto@...
Subject: [ap-gto] Re: comet guiding



Hi,

Isn't there the Smart-Guide feature in the keypad? It should be fairly
easy possible to calculate the deltas in RA & DEC and set the numbers
in the keypad to follow a comet.

Clear Skies,

Getr

--- In HYPERLINK "mailto:ap-gto%40yahoogroups.com"ap-gto@...,
chris1011@..-. wrote:

In a message dated 2/6/2007 10:27:39 AM Central Standard Time,
geert.vdbulcke@-... writes:


I know there is other software that can do it
through the PC and mount (Pulseguide I think) but it would be nice
to have a
similar feature in the AP900/1200 keypad...
The keypad is somewhat limited in memory and computing power. Thus
the need
for a laptop.

Rolando








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17:52



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17:52


Re: comet guiding

drgert1
 

Hi,

Isn't there the Smart-Guide feature in the keypad? It should be fairly
easy possible to calculate the deltas in RA & DEC and set the numbers
in the keypad to follow a comet.

Clear Skies,

Getr

--- In ap-gto@..., chris1011@... wrote:

In a message dated 2/6/2007 10:27:39 AM Central Standard Time,
geert.vdbulcke@... writes:


I know there is other software that can do it
through the PC and mount (Pulseguide I think) but it would be nice
to have a
similar feature in the AP900/1200 keypad...
The keypad is somewhat limited in memory and computing power. Thus
the need
for a laptop.

Rolando


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


Re: New file uploaded to ap-gto

dalebranlund
 

Roland,

Here is the prescription of the design that ATMOS
requires.

The strict RC, f/8, FL = 3200 mm
f/3.5 primary, FL = 1400 mm
Objective diameter, 400 mm
Imaging Circle, 52 mm in diameter
Backfocus from (sky facing) primary mirror = 300 mm
Conic constant = -1.2244 primary
Conic constant = -9.9426 secondary

Thanks,
Dale

--- chris1011@... wrote:

In a message dated 2/6/2007 4:11:25 PM Central
Standard Time,
d.branlund@... writes:


What is the focal length of the compressor and
backfocus requirements?

Any chance the compressor will also would with a
400mm
f/8 RC?
The back focus is very tightly controlled to within
1mm with a special
adapter that screws right onto the outer plate of
the STL camera. Without knowing
the exact design of the RC I would have no way of
knowing whether or not it
would work.

Rolando


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


Re: New file uploaded to ap-gto

dalebranlund
 

The 100% blow up of IC410 shows sharp stars clear to
to corner of the image. Image scale for this set up
is about 2.25" and the airy disk diameter about 7.8
microns. Impressive.

What is the focal length of the compressor and
backfocus requirements?

Any chance the compressor will also would with a 400mm
f/8 RC?

Dale



--- chris1011@... wrote:

In a message dated 2/5/2007 6:16:25 PM Central
Standard Time,
d.branlund@... writes:


With a compressor, it is very difficult to get
diffaction limited performance over the field of
view
that an STL-11000 presents. Any idea what the spot
size is a the edge of the field? Are you still
using
to 2 lense corrector?
It is a 3 element compressor. I purposely posted the
closeup of IC410 to
allow you to see what the image looks like at 100%
enlargement in the upper right
hand corner. The TCC does not quite provide
diffraction limited stars in the
very corner, but comes close. The compressor was
designed for the160EDF, which
has a longer focal length and smaller field by
approximately 10%. That scope
combination comes closer to diffraction limited
performance. We also have a
dedicated field flattener for both scopes, and they
do produce diffraction
limited performance over this field size (and
larger).

Roland Christen


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


Re: New file uploaded to ap-gto

Roland Christen
 

In a message dated 2/6/2007 4:11:25 PM Central Standard Time,
d.branlund@... writes:


What is the focal length of the compressor and
backfocus requirements?

Any chance the compressor will also would with a 400mm
f/8 RC?
The back focus is very tightly controlled to within 1mm with a special
adapter that screws right onto the outer plate of the STL camera. Without knowing
the exact design of the RC I would have no way of knowing whether or not it
would work.

Rolando


comet guiding

Geert Vandenbulcke <geert.vdbulcke@...>
 

Hello,

it's some time now since I got my AP1200 GTO CP3 (what do GTO and CP mean
btw?). I don't know how often the software in the keypad or controller are
upgraded, but I'm missing a function that I had in the Astro-Elektronic FS-2
controller that I used on the ALT AD7 mount I had before. In the FS-2 one
can input the relative movement of a comet in 24 hours (The Sky gives these
data as well) and then the mount moves accordingly in RA and DEC rather
than at sidereal rate. I know there is other software that can do it
through the PC and mount (Pulseguide I think) but it would be nice to have a
similar feature in the AP900/1200 keypad...

Best regards,

Geert

--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.432 / Virus Database: 268.17.27/671 - Release Date: 5/02/2007
16:48


Re: comet guiding

Roland Christen
 

In a message dated 2/6/2007 10:27:39 AM Central Standard Time,
geert.vdbulcke@... writes:


I know there is other software that can do it
through the PC and mount (Pulseguide I think) but it would be nice to have a
similar feature in the AP900/1200 keypad...
The keypad is somewhat limited in memory and computing power. Thus the need
for a laptop.

Rolando


Re: New file uploaded to ap-gto

Roland Christen
 

In a message dated 2/5/2007 10:08:40 PM Central Standard Time,
jjanusz@... writes:


Do you still have one of these to test it on? If not I would be happy to do
the testing, I have
the scope and the
camera. (G)
Testing requires hours of work and respacing of the elements to determine the
exact light paths for the various wavelengths. I'm afraid that it cannot be
done external to AP.

Rolando


Re: New file uploaded to ap-gto

jjanusz@...
 

Do you still have one of these to test it on? If not I would be happy to do the testing, I have
the scope and the
camera. (G)

Jim

----- Original Message -----
From: chris1011@...
Date: Monday, February 5, 2007 3:54 pm
Subject: Re: [ap-gto] New file uploaded to ap-gto
To: ap-gto@...

In a message dated 2/5/2007 5:34:32 PM Central Standard Time,
jjanusz@... writes:


Hi Rolando,

Any chance the TCC will work with my 180EDF
It might. I would need to try it out first.

Rolando






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Re: New file uploaded to ap-gto

dalebranlund
 

It is a 4" compressor.
With a compressor, it is very difficult to get
diffaction limited performance over the field of view
that an STL-11000 presents. Any idea what the spot
size is a the edge of the field? Are you still using
to 2 lense corrector?

Dale

--- chris1011@... wrote:

In a message dated 2/5/2007 4:58:56 PM Central
Standard Time,
d.branlund@... writes:


The guiding performance of the Mach GTO mount is
superb and the images are outstanding. Did you use
periodic error correction via PemPro? If so, how
many
passes of PemPro did you use to refine the guiding
to
this level?
No, I did not use PEMPro, but that would be an
option if you wanted to do
unguided imaging for more than 30 seconds. In that
case, you would indeed switch
on the PEM and refine it with PEMPro.



Does the new TCC work with the EDFS 2.7" focuser
or do
you need to upgrade to the EDF 4" focuser?
It is a 4" compressor.

Roland Christen


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


Re: New file uploaded to ap-gto

Chris Ford <cford81@...>
 


Does the new TCC work with the EDFS 2.7" focuser or do
you need to upgrade to the EDF 4" focuser?
It is a 4" compressor.
Hello Roland,

As I currently have a 4" focuser on order for my 155 this looks really interesting!

Asking (a perhaps dumb) question I assume that there is increasingly little need for your
existing 4" field flattener using this particular combination? (At this f ratio at least)

Chris


Re: New file uploaded to ap-gto

jjanusz@...
 

Hi Rolando,

Any chance the TCC will work with my 180EDF

Jim

----- Original Message -----
From: chris1011@...
Date: Monday, February 5, 2007 1:56 pm
Subject: Re: [ap-gto] New file uploaded to ap-gto
To: ap-gto@...

Hi All,

Been having fun imaging in sub zero weather - brrrrrr. At least
it's clear.
Take a look at the images that I posted in the files section. Note
the guiding
performance of the Mach1 with the 155EDF. It was set up in my
observatory, so
it was being sheltered from the wind to some extent, although I
would guess
that it would not have been affected mush at all by any normal
wind situation.
The images show the performance of the mount and the TCC operating
at F5.3,
which opens up a new option for 155EDF owners for wide field
imaging with the STL
cameras. We will have this product available shortly (after I get
the
elements coated).

Rolando






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see http://groups.yahoo.com/group/ap-gto
Yahoo! Groups Links




Re: New file uploaded to ap-gto

dalebranlund
 

Roland,

The guiding performance of the Mach GTO mount is
superb and the images are outstanding. Did you use
periodic error correction via PemPro? If so, how many
passes of PemPro did you use to refine the guiding to
this level?

Does the new TCC work with the EDFS 2.7" focuser or do
you need to upgrade to the EDF 4" focuser?


Thanks, Dale



--- chris1011@... wrote:

Hi All,

Been having fun imaging in sub zero weather -
brrrrrr. At least it's clear.
Take a look at the images that I posted in the files
section. Note the guiding
performance of the Mach1 with the 155EDF. It was set
up in my observatory, so
it was being sheltered from the wind to some extent,
although I would guess
that it would not have been affected mush at all by
any normal wind situation.
The images show the performance of the mount and the
TCC operating at F5.3,
which opens up a new option for 155EDF owners for
wide field imaging with the STL
cameras. We will have this product available shortly
(after I get the
elements coated).

Rolando


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


Re: noisy 1200

snightingale40 <snightingale40@...>
 

--- In ap-gto@..., chris1011@... wrote:
Don't be afraid of the mount. It is quite simple.

Rolando

Thanks Roland---it sounds like I have something in common with my 1200!!

;>)

Steve


New file uploaded to ap-gto

ap-gto@...
 

Hello,

This email message is a notification to let you know that
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File : /Mach1 mount performance/IC410.jpg
Uploaded by : uncarollo2 <chris1011@...>
Description : Closeup of IC410 in upper right corner

You can access this file at the URL:
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uncarollo2 <chris1011@...>


New file uploaded to ap-gto

ap-gto@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ap-gto
group.

File : /Mach1 mount performance/IC405-410-Finished1.jpg
Uploaded by : uncarollo2 <chris1011@...>
Description : IC405-410 6x20min exposure @F5.3

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New file uploaded to ap-gto

ap-gto@...
 

Hello,

This email message is a notification to let you know that
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File : /Mach1 mount performance/Screenshot.jpg
Uploaded by : uncarollo2 <chris1011@...>
Description : Mount performance with Maxim DL

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New file uploaded to ap-gto

ap-gto@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ap-gto
group.

File : /Mach1 mount performance/Mach1-155-STL11K-TCC.jpg
Uploaded by : uncarollo2 <chris1011@...>
Description : 155EDF on Mach1/Eagle1 Pier, F5.3TCC, STL11K

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Re: New file uploaded to ap-gto

Roland Christen
 

In a message dated 2/5/2007 6:16:25 PM Central Standard Time,
d.branlund@... writes:


With a compressor, it is very difficult to get
diffaction limited performance over the field of view
that an STL-11000 presents. Any idea what the spot
size is a the edge of the field? Are you still using
to 2 lense corrector?
It is a 3 element compressor. I purposely posted the closeup of IC410 to
allow you to see what the image looks like at 100% enlargement in the upper right
hand corner. The TCC does not quite provide diffraction limited stars in the
very corner, but comes close. The compressor was designed for the160EDF, which
has a longer focal length and smaller field by approximately 10%. That scope
combination comes closer to diffraction limited performance. We also have a
dedicated field flattener for both scopes, and they do produce diffraction
limited performance over this field size (and larger).

Roland Christen


Re: New file uploaded to ap-gto

Roland Christen
 

In a message dated 2/5/2007 6:08:07 PM Central Standard Time,
cford81@... writes:


Asking (a perhaps dumb) question I assume that there is increasingly little
need for your
existing 4" field flattener using this particular combination? (At this f
ratio at least)
The field flattener allows you to shoot at F7, which provides a smaller field
but higher inherent resolution. It also allows you to cover a much larger
field than the 35mm that the TCC covers. It would allow you to use any future 2"
square or even larger CCD whenever they become available.

Rolando