Date   

just discovered something cool

Richard Crisp
 

I just discovered something cool

I am using the baader narrowband set on the ap180edt f/9 right now. first time to use them on anything but the pentax 6x7 lenses (150, 200, 300mm so far)

anyway on the big apo i found that they are parfocal!

so on a well color corrected scope, the filters are parfocal at 673, 656, and 500nm wavelengths

that's a nice and unexpected benefit!

it sure takes time to test gear though: you get all set up to use one configuration and then hate to switch to something else: halfway through a multi-night image etc: once I get on a roll shooting images with one system configuration I tend to stick with it for a while. Anyway it is nice to get to use the filters on the big apo. Hopefully I will have some results to show pretty soon.

rdc


Re: Correction - Mach1GTO with Celestron CGE tripod

 

Dear Edd,

You should not remove the center positioning pin of the 900 plate. It is needed to keep the mount centered when you are making your azimuth adjustments. If you remove it, the mount will shift around when you turn the azimuth adjustment knobs and you will pull your hair out in frustration.


Marj Christen
Astro-Physics, Inc
11250 Forest Hills Road
Machesney Park, IL 61115
Phone: 815-282-1513
Fax: 815-282-9847
www.astro-physics.com
Please include this e-mail with your response.

-----Original Message-----
From: ap-gto@... [mailto:ap-gto@...]On Behalf Of eddwen2001
Sent: Tuesday, August 21, 2007 4:46 PM
To: ap-gto@...
Subject: [ap-gto] Re: Correction - Mach1GTO with Celestron CGE tripod



Corrections:

Just had a chance to review my gear.

The CGE tripod presents a top surface of 5.490" diameter x 0.94" high
above the leg top hinge surface. There is a tapped center hole for
the tripod tensioning draw-bolt (bolt does not need to protrude above
the top surface). There are 3 each 0.38" dia. cast-in holes on a
4.00" diameter bolt circle.

The AP900 pier adapter plate is 0.975" total thickness. The bottom
of the plate has a counter-bore ~6.63" dia. x 0.675" deep, leaving a
central plate thickness of 0.30".

I drilled and tapped 3 each 3/8" x 16 holes at 120 degrees in the
plate.

3/8" x 16 x 1" long bolts, used with suitable lock washers, will
solidly retain the plate to the tripod without the bolts protruding.

It is necessary to either shorten, back-off or remove the center
0.495" dia. positioning pin of the 900 plate.

The 900 is then conventionally mounted on the plate.

Clear skies,

Edd Weninger
Overgaard AZ

--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com, "eddwen2001" <Eddwen@...> wrote:

I used 3 ea. 5/16-18 tapped holes on a 4.00" Bolt Circle @ 120* in
the 900 pier adapter plate. Bolts/washers of suitable length
inserted from below to assure bolts do not protrude above plate top
surface. I should also note that the center tensioning draw-bolt
of
the CGE tripod may need to be trimmed if you want to keep the .495
dia. center positioning cap screw functional.

If you need to know the bolt length, let me know and I'll pull one
out.

Clear skies,

Edd Weninger
Overgaard AZ



--- In ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com, chris1011@ wrote:

In a message dated 8/21/2007 9:19:41 AM Central Daylight Time,
Eddwen@
writes:


I have my 900/155 on a CGE tripod. The tripod is really sturdy.
I
simply tapped a few holes in the 900 adapter plate to match the
mount
holes in the CGE plate. The CGE top plate is a casting with the
holes
in place so there is no easy way to modify it to match the 900
plate.
I assume you can do similar with the Mach 1.

Clear skies,

Edd Weninger
Overgaard AZ
Thanks, we'll have to look into that.

Rolando


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Re: Correction - Mach1GTO with Celestron CGE tripod

Edd Weninger
 

Corrections:

Just had a chance to review my gear.

The CGE tripod presents a top surface of 5.490" diameter x 0.94" high
above the leg top hinge surface. There is a tapped center hole for
the tripod tensioning draw-bolt (bolt does not need to protrude above
the top surface). There are 3 each 0.38" dia. cast-in holes on a
4.00" diameter bolt circle.

The AP900 pier adapter plate is 0.975" total thickness. The bottom
of the plate has a counter-bore ~6.63" dia. x 0.675" deep, leaving a
central plate thickness of 0.30".

I drilled and tapped 3 each 3/8" x 16 holes at 120 degrees in the
plate.

3/8" x 16 x 1" long bolts, used with suitable lock washers, will
solidly retain the plate to the tripod without the bolts protruding.

It is necessary to either shorten, back-off or remove the center
0.495" dia. positioning pin of the 900 plate.

The 900 is then conventionally mounted on the plate.

Clear skies,

Edd Weninger
Overgaard AZ







--- In ap-gto@..., "eddwen2001" <Eddwen@...> wrote:

I used 3 ea. 5/16-18 tapped holes on a 4.00" Bolt Circle @ 120* in
the 900 pier adapter plate. Bolts/washers of suitable length
inserted from below to assure bolts do not protrude above plate top
surface. I should also note that the center tensioning draw-bolt
of
the CGE tripod may need to be trimmed if you want to keep the .495
dia. center positioning cap screw functional.

If you need to know the bolt length, let me know and I'll pull one
out.

Clear skies,

Edd Weninger
Overgaard AZ



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

In a message dated 8/21/2007 9:19:41 AM Central Daylight Time,
Eddwen@
writes:


I have my 900/155 on a CGE tripod. The tripod is really sturdy.
I
simply tapped a few holes in the 900 adapter plate to match the
mount
holes in the CGE plate. The CGE top plate is a casting with the
holes
in place so there is no easy way to modify it to match the 900
plate.
I assume you can do similar with the Mach 1.

Clear skies,

Edd Weninger
Overgaard AZ
Thanks, we'll have to look into that.

Rolando


**************************************
Get a sneak peek of the all-new
AOL at http://discover.aol.com/memed/aolcom30tour


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


Re: Mach1GTO with Celestron CGE tripod

Edd Weninger
 

I used 3 ea. 5/16-18 tapped holes on a 4.00" Bolt Circle @ 120* in
the 900 pier adapter plate. Bolts/washers of suitable length
inserted from below to assure bolts do not protrude above plate top
surface. I should also note that the center tensioning draw-bolt of
the CGE tripod may need to be trimmed if you want to keep the .495
dia. center positioning cap screw functional.

If you need to know the bolt length, let me know and I'll pull one
out.

Clear skies,

Edd Weninger
Overgaard AZ



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

In a message dated 8/21/2007 9:19:41 AM Central Daylight Time,
Eddwen@...
writes:


I have my 900/155 on a CGE tripod. The tripod is really sturdy. I
simply tapped a few holes in the 900 adapter plate to match the
mount
holes in the CGE plate. The CGE top plate is a casting with the
holes
in place so there is no easy way to modify it to match the 900
plate.
I assume you can do similar with the Mach 1.

Clear skies,

Edd Weninger
Overgaard AZ
Thanks, we'll have to look into that.

Rolando


**************************************
Get a sneak peek of the all-new
AOL at http://discover.aol.com/memed/aolcom30tour


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


Re: Help with RS232 to USB cable

Paul <plefevre@...>
 

Hi Tom,
Here's a web page that may help:

http://www.usbgear.com/USB-Serial.html

More options than you'll ever want, probably :)
I use their USB to 2-serial-port adapter...one goes to the AP mount,
one to my RoboFocus (#USGB-2X232 on that page). The serial cables
from the adapter can basically be as long as you want them to be, mine
are both 12 feet. It very reliably runs my mount and focuser, and is
$40. Lots of other less expensive options that work well.

Paul

--- In ap-gto@..., "tucstargzr" <tucstargzr@...> wrote:

As the subject implies, I'm looking for a ~4-5 meter adapter cable
between the mount and USB computer port. I know I saw some traffic
on
this (Possible future AP product?) but darned if I can find it again.
IIRC, the key was a type/brand of chip in the cable????

Forgive my poor search skills...

Tom
Tucson, AZ


Help with RS232 to USB cable

tucstargzr
 

As the subject implies, I'm looking for a ~4-5 meter adapter cable
between the mount and USB computer port. I know I saw some traffic on
this (Possible future AP product?) but darned if I can find it again.
IIRC, the key was a type/brand of chip in the cable????

Forgive my poor search skills...

Tom
Tucson, AZ


Re: Mach1GTO with Celestron CGE tripod

Edd Weninger
 

I have my 900/155 on a CGE tripod. The tripod is really sturdy. I
simply tapped a few holes in the 900 adapter plate to match the mount
holes in the CGE plate. The CGE top plate is a casting with the holes
in place so there is no easy way to modify it to match the 900 plate.
I assume you can do similar with the Mach 1.

Clear skies,

Edd Weninger
Overgaard AZ

--- In ap-gto@..., "ayiomamitis" <ayiomami@...> wrote:

Dear group,

Has anyone tried using their Mach1GTO with a Celestron CGE tripod?
There is a really sweet deal on these mounts right now and I am eager
to learn how suitable they are? Ditto for an adapter to mate the
Mach1GTO to the tripod.

On the basis of the specs I have seen for the CGE tripod, there should
be absolutely no problem combining these two items.

As much as I would like to use a Losmandy G-11 tripod, the deal
available right now for the CGE is very sweet.

Thanks in advance for any info!

Anthony.


Re: Mach1GTO with Celestron CGE tripod

Roland Christen
 

In a message dated 8/21/2007 9:19:41 AM Central Daylight Time, Eddwen@...
writes:


I have my 900/155 on a CGE tripod. The tripod is really sturdy. I
simply tapped a few holes in the 900 adapter plate to match the mount
holes in the CGE plate. The CGE top plate is a casting with the holes
in place so there is no easy way to modify it to match the 900 plate.
I assume you can do similar with the Mach 1.

Clear skies,

Edd Weninger
Overgaard AZ
Thanks, we'll have to look into that.

Rolando


**************************************
Get a sneak peek of the all-new
AOL at http://discover.aol.com/memed/aolcom30tour


Re: Back to normal start-up behavior...

Paul <plefevre@...>
 

Thought I'd better report on-list that everything is now up and
running and working great.

Howard spent a good 30 minutes on the phone with me, working out the
issues. To make sure everything was taken care of, he prodded me to
update to the 4.12 keypad software as well (being firmly in the "if it
ain't broke don't fix it" camp, I had never upgraded from 3.20).
After a keypad battery replacement (4.75 years), database reload, and
the 4.12 update my ap900 is again humming like the fine machine it
is. In fact, I swear the servo motors seem to run even quieter with
the 4.12 software :)

Thanks Roland and Howard -- how many other companies spend so much
time troubleshooting and supporting a nearly 5-year old product that
the owner hasn't updated? A rare thing, and much appreciated.

Paul

p.s. for anyone else who might need one, Fry's has a plentiful supply
(at least my two local ones) of Renata CR1632 batteries for the "old-
style" AP keypads...:)


Re: E1 chip problems

Dean Salman <cluster@...>
 

I fixed it, it was software after all. The sample size was wrong
because the check box to read it from the fits file was off. I am
not sure why maxim does not keep that checked when the user checks it.




--- In ap-gto@..., "Ray Gralak" <rgr@...> wrote:

Hi Dean,

Are you using a serial to USB converter?

-Ray

-----Original Message-----
From: ap-gto@... [mailto:ap-gto@...]
On Behalf Of Dean Salman
Sent: Monday, August 20, 2007 10:20 PM
To: ap-gto@...
Subject: [ap-gto] E1 chip problems

I put in the E1 chip and everything looked like it was working
but
Maxim DL can no longer plate slove which was working
perfectly with the
D chip. Is anyone using Maxim DL to plate solve that has the E1
chip,
if so and it works then the one I got is defective. My guess is
that
the process that reads the mount information during plate solve
is
failing

I guess my fix is to put the D chip back in.





Re: E1 chip problems

Ray Gralak <rgr@...>
 

Hi Dean,

Are you using a serial to USB converter?

-Ray

-----Original Message-----
From: ap-gto@... [mailto:ap-gto@...]
On Behalf Of Dean Salman
Sent: Monday, August 20, 2007 10:20 PM
To: ap-gto@...
Subject: [ap-gto] E1 chip problems

I put in the E1 chip and everything looked like it was working but
Maxim DL can no longer plate slove which was working
perfectly with the
D chip. Is anyone using Maxim DL to plate solve that has the E1 chip,
if so and it works then the one I got is defective. My guess is that
the process that reads the mount information during plate solve is
failing

I guess my fix is to put the D chip back in.





E1 chip problems

Dean Salman <cluster@...>
 

I put in the E1 chip and everything looked like it was working but
Maxim DL can no longer plate slove which was working perfectly with the
D chip. Is anyone using Maxim DL to plate solve that has the E1 chip,
if so and it works then the one I got is defective. My guess is that
the process that reads the mount information during plate solve is
failing

I guess my fix is to put the D chip back in.


Re: 12.5" RC or RCA?

Todd Klaus
 

Thanks Jim, I'll check it out!


--- In ap-gto@..., Jim Ehlers <equinerider@...> wrote:

Hi Todd,

I have a group called classicalcassegrain on Yahoo. We talk about
all the designs: RC,DK,CC.

You may want to ask there too?

Regards,

Jim

tklaus <toddklaus@...> wrote:

There's no Ritchey-Chretien group that I could find, so I thought I
would post this question here since many AP owners also have RCs (I
have an AP900).

I'm trying to decide between the RCOS 12.5" (f/9) and her less
expensive sister, the new RCOS 12" Astrograph (f/6.6).

I like the fact that the RC has 16.8% more clear aperture (smaller
central obstruction) and that there's more back focus, but the RCA is
attractive because of the lower cost and the fact that it's a native
f/6.6 (which with my ST-10XME, would give me a image scale of
0.68"/pix). The main problem with the RCA is that with the 6.5" back
focus, there's not enough room for a PIR *and* and AO-7 (I don't have
an AO-7 at the moment, but it would be nice to keep the option open).

Of course, the RC has the Astro-Sitall zero-expansion mirrors vs. the
Pyrex in the RCA, but I wonder if that would make much practical
difference under my coastal San Jose, CA skies (FWHM averages around
3, with good nights dropping to around the low 2's).

Any thoughts, comments, speculations, etc. welcome!

Thanks,
Todd






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


Mach1GTO with Celestron CGE tripod

ayiomamitis
 

Dear group,

Has anyone tried using their Mach1GTO with a Celestron CGE tripod?
There is a really sweet deal on these mounts right now and I am eager
to learn how suitable they are? Ditto for an adapter to mate the
Mach1GTO to the tripod.

On the basis of the specs I have seen for the CGE tripod, there should
be absolutely no problem combining these two items.

As much as I would like to use a Losmandy G-11 tripod, the deal
available right now for the CGE is very sweet.

Thanks in advance for any info!

Anthony.


Re: dumb question

Glenn Edens
 

Thank you Karl and Jeff, somehow i was searching on the wrong terms
and missed the earlier messages. appreciate the help. the Mach1 is
an amazing mount! I'm using it with a C9.25 SCT and an AP155EDFS.

glenn

On Aug 19, 2007, at 3:47 PM, Jeff Young wrote:

Glenn --

The Mach1, 900 and 1200 all use the same parameters in the servo
controller. So either the 900 or 1200 setting will do.

(See also message 16008.)

-- Jeff.


________________________________

From: ap-gto@... [mailto:ap-gto@...] On
Behalf Of Glenn Edens
Sent: Sunday, August 19, 2007 8:41 PM
To: ap-gto@...
Subject: [ap-gto] dumb question



what mount type should the controller be set for use with the
Mach1?
The only options on my GTOCP3 are 400, 600E, 900 and 1200. I
have
not been able to find this in the documentation for either the
Mach1
or the GTO hand controller (v4.12) that came with my Mach1.

thank you,

glenn edens









Re: Back to normal start-up behavior...

Paul <plefevre@...>
 

--- In ap-gto@..., chris1011@... wrote:
Call Howard here at AP (815-282-1513) and he will go through the
keypad
settings with you and make sure that you have proper data in your
keypad. From your
desription it is impossible for me to know what happened to your
keypad or
how it might have been set wrong.

Roland Christen

Thanks Roland, I'll call.
Because I wasn't there when it happened, I don't have any way of
knowing how it was set, either :(

Paul


Back to normal start-up behavior...

Paul <plefevre@...>
 

I had 20+ cub scouts (plus their parents)at my observatory Friday
night, for a presentation on astronomy and then viewing of the moon,
Jupiter, and some deep-sky objects. It was a big hit, and the scouts
all got their astronomy badges.

One downside: at one point of the evening, when there was a long
line waiting to look through the scopes (I had an 8" Vixen VC200L and
an NP-101 mounted in tandem on my AP-900GTO), I left the observatory
for a few minutes for a break. I figured the scoutmaster would be
able to shepherd them to the scope for a view and keep the line
going, and they knew the rules about not touching anything but
focusers. However, one of the kids apparently turned off the power
supply to the mount, then turned it back on...and the scoutmaster
did "something" with the hand controller after it came back on. When
I got back I turned it off, let it sit for 30 seconds, then back on --
figured I'd just do a 1-star alignment and we'd be back to normal.

Problem is, the start-up on the hand controller is now different.
Instead of 1-star alignment and 2-star alignment options (plus resume
from park), it only has "star sync" and resume from park options.
Also, if I choose star sync and choose a star in the east (with scope
on the west side of the mount), the mount now thinks everything is
below the horizon (things like M8, which are plenty high). What
changed?

My manual is somewhere in boxes that I can't find, seeing as I
haven't had a need for it in over 3 years...so I could use some help!
The AP-900GTO is permanently mounted in my observatory, and hasn't
moved in over a year, with the same startup routine going every
time. I seem to recall something about holding down hand controller
keys on power-up that lets me change the options, but can't remember
what it is...? Help? :)

Thanks,

Paul LeFevre


Re: New AP-1200 on homemade tripod

Dean Salman <cluster@...>
 

Great job, it looks really strong. Dean


--- In ap-gto@..., "gilchriswa" <gilchris@...> wrote:

All,

My AP-1200 arrived last week! It was purchased specifically for an
observatory I'm planning to build, so I didn't order a portable
pier.
Since the observatory isn't built yet (I expected to be on the
waiting
list for a couple of years), I've made a tripod for temporary use
so I
can get familiar with the mount. I've uploaded a photo of the
homemade tripod to the files section.

http://groups.yahoo.com/group/ap-gto/files/AP-1200%2Btripod.jpg

Along with some odd pieces from my garage, I spent about $35 for
lumber and hardware. Hopefully this will do until I can get the
observatory built.

Allen G


Re: New AP-1200 on homemade tripod

eja24601
 

That looks really nice, Allen! I'm in a similar situation as you,
except I'm planning a simple observatory (really more of a roll-of-
shed). My AP1200 is sitting in our bedroom, still in pieces, still
wrapped in its packing bags, patiently waiting for that day when I
can assemble it and give it first light.

Your setup looks stable enough to start shooting now! BTW, our
dining room furniture is very similar to yours! :D

Eric

--- In ap-gto@..., "gilchriswa" <gilchris@...> wrote:

All,

My AP-1200 arrived last week! It was purchased specifically for
an
observatory I'm planning to build, so I didn't order a portable
pier.
Since the observatory isn't built yet (I expected to be on the
waiting
list for a couple of years), I've made a tripod for temporary use
so I
can get familiar with the mount. I've uploaded a photo of the
homemade tripod to the files section.

http://groups.yahoo.com/group/ap-gto/files/AP-1200%2Btripod.jpg

Along with some odd pieces from my garage, I spent about $35 for
lumber and hardware. Hopefully this will do until I can get the
observatory built.

Allen G


Re: Back to normal start-up behavior...

Roland Christen
 

In a message dated 8/20/2007 10:31:16 AM Central Daylight Time,
plefevre@... writes:



I had 20+ cub scouts (plus their parents)at my observatory Friday
night, for a presentation on astronomy and then viewing of the moon,
Jupiter, and some deep-sky objects. It was a big hit, and the scouts
all got their astronomy badges.

One downside: at one point of the evening, when there was a long
line waiting to look through the scopes (I had an 8" Vixen VC200L and
an NP-101 mounted in tandem on my AP-900GTO), I left the observatory
for a few minutes for a break. I figured the scoutmaster would be
able to shepherd them to the scope for a view and keep the line
going, and they knew the rules about not touching anything but
focusers. However, one of the kids apparently turned off the power
supply to the mount, then turned it back on...and the scoutmaster
did "something" with the hand controller after it came back on. When
I got back I turned it off, let it sit for 30 seconds, then back on --
figured I'd just do a 1-star alignment and we'd be back to normal.

Problem is, the start-up on the hand controller is now different.
Instead of 1-star alignment and 2-star alignment options (plus resume
from park), it only has "star sync" and resume from park options.
Also, if I choose star sync and choose a star in the east (with scope
on the west side of the mount), the mount now thinks everything is
below the horizon (things like M8, which are plenty high). What
changed?

My manual is somewhere in boxes that I can't find, seeing as I
haven't had a need for it in over 3 years...so I could use some help!
The AP-900GTO is permanently mounted in my observatory, and hasn't
moved in over a year, with the same startup routine going every
time. I seem to recall something about holding down hand controller
keys on power-up that lets me change the options, but can't remember
what it is...? Help? :)

Thanks,

Paul LeFevre
Call Howard here at AP (815-282-1513) and he will go through the keypad
settings with you and make sure that you have proper data in your keypad. From your
desription it is impossible for me to know what happened to your keypad or
how it might have been set wrong.

Roland Christen

Roland Christen




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