astro: m96

M96
30 x 90 sec.
Here also a lot of moisture in the air (kendrick couldn't hold it much longer after 30 x 90 sec...)
No autoguiding
10"SCT
Homebuild CCD camera.
No filters used.
MAXIMDL
CS2
for slight processing.
Thx for looking
reg
Dirk

D van den H wrote:

M96
30 x 90 sec.
Here also a lot of moisture in the air (kendrick couldn't hold it much
longer after 30 x 90 sec...)
No autoguiding
10"SCT
Homebuild CCD camera.
No filters used.
MAXIMDL
CS2
for slight processing.
Thx for looking
reg
Dirk

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

Do you have both a dew shield and objective warmer? I live on a lake
and need both to keep dew at bay. Without the warmer the dew shield
rarely is enough. Without the shield the warmer even on full fails to
keep the center of the objective clear around the secondary. A 5 cm
band of dew forms around the secondary even on full. With both I can
run the warmer at about 1/3rd power and have no problems. Together they
are far more powerful than either alone. From my film days of
super-addititve developers that together are far more than twice as
powerful as either alone I'd say these dew zapper techniques are also
super-additive.

I was working on my M96 shot when the power supply on the computer went
bad. I've now found if I turn it off and unplug it from the computer
for a couple hours I can get about 20 minutes of time running the
computer or can fully charge the battery, but not both before it cuts
out again. But I really don't want to run on battery power and kill the
battery only to find I can't recharge it again so am working 20 minutes
at a time. Not easy to do much restarting all the time.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

Rick, yep i had the dew shield also on..
I live near the north sea (17 km way from shoreline) and the damp air comes
in quickly in the evening..
One moment there nothing wrong and the other moment all the windows and
scope are wet..
Fight the clouds or fight the damp air.. allways something.
And than on a clear saterday (or other) night.. there the wife she wants
some attention too haha...

Rick thanks for sharing.

reg
Dirk

"Rick Johnson" wrote in message
...


D van den H wrote:

M96
30 x 90 sec.
Here also a lot of moisture in the air (kendrick couldn't hold it much
longer after 30 x 90 sec...)
No autoguiding
10"SCT
Homebuild CCD camera.
No filters used.
MAXIMDL
CS2
for slight processing.
Thx for looking
reg
Dirk

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

Do you have both a dew shield and objective warmer? I live on a lake and
need both to keep dew at bay. Without the warmer the dew shield rarely is
enough. Without the shield the warmer even on full fails to keep the
center of the objective clear around the secondary. A 5 cm band of dew
forms around the secondary even on full. With both I can run the warmer
at about 1/3rd power and have no problems. Together they are far more
powerful than either alone. From my film days of super-addititve
developers that together are far more than twice as powerful as either
alone I'd say these dew zapper techniques are also super-additive.

I was working on my M96 shot when the power supply on the computer went
bad. I've now found if I turn it off and unplug it from the computer for
a couple hours I can get about 20 minutes of time running the computer or
can fully charge the battery, but not both before it cuts out again. But
I really don't want to run on battery power and kill the battery only to
find I can't recharge it again so am working 20 minutes at a time. Not
easy to do much restarting all the time.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

There's always a hair dryer though that can blow dust into the dew and
then glue it to the corrector. Even with light fog I've not had a
problem though gallons of water collect in the two buckets I have to
catch it coming off the observatory roof. It would drain on my
observing table without the catch buckets. I doubt the computer would
like that.

A second heater?

Rick


D van den H wrote:
Rick, yep i had the dew shield also on..
I live near the north sea (17 km way from shoreline) and the damp air comes
in quickly in the evening..
One moment there nothing wrong and the other moment all the windows and
scope are wet..
Fight the clouds or fight the damp air.. allways something.
And than on a clear saterday (or other) night.. there the wife she wants
some attention too haha...

Rick thanks for sharing.

reg
Dirk

"Rick Johnson" wrote in message
...


D van den H wrote:


M96
30 x 90 sec.
Here also a lot of moisture in the air (kendrick couldn't hold it much
longer after 30 x 90 sec...)
No autoguiding
10"SCT
Homebuild CCD camera.
No filters used.
MAXIMDL
CS2
for slight processing.
Thx for looking
reg
Dirk

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

Do you have both a dew shield and objective warmer? I live on a lake and
need both to keep dew at bay. Without the warmer the dew shield rarely is
enough. Without the shield the warmer even on full fails to keep the
center of the objective clear around the secondary. A 5 cm band of dew
forms around the secondary even on full. With both I can run the warmer
at about 1/3rd power and have no problems. Together they are far more
powerful than either alone. From my film days of super-addititve
developers that together are far more than twice as powerful as either
alone I'd say these dew zapper techniques are also super-additive.

I was working on my M96 shot when the power supply on the computer went
bad. I've now found if I turn it off and unplug it from the computer for
a couple hours I can get about 20 minutes of time running the computer or
can fully charge the battery, but not both before it cuts out again. But
I really don't want to run on battery power and kill the battery only to
find I can't recharge it again so am working 20 minutes at a time. Not
easy to do much restarting all the time.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

"Rick Johnson" wrote
....
There's always a hair dryer though that can blow dust into the dew and
then glue it to the corrector........

Dew (and frost) avoidance is perhaps the only good thing about working in
a dome. Since 1986 I've never seen our C-14's corrector dewed even when it's
soaked outside.

One year at Stellafane I made the mistake of using the backend of my SUV
as a desk/work-area/etc for myself and the guys from OGS (had a 12.5" RC and
a 6" Tak APO). At dawn I decided to sack out in the truck only to find that
the entire inside was completely soaked since I had left the back open all
night. Live and learn........

The shroud on my Obsession 20 often frosts up so bad that the entire scope
turns white even thou it's black!

The bad part about all of this in the Northeast USA is that our frost/dew
is far more acidic than the rain and really does a number on optics. The ph
of melted frost often is about the same as vinegar.

George N

Your recording good detail... now it's time to get to autoguiding and
longer sub exposures.... I think you will get some great shots.

--
Regards, Doug W.
www.photonsfate.com
--
"D van den H" wrote in message
bel.net...
M96
30 x 90 sec.
Here also a lot of moisture in the air (kendrick couldn't hold it much
longer after 30 x 90 sec...)
No autoguiding
10"SCT
Homebuild CCD camera.
No filters used.
MAXIMDL
CS2
for slight processing.
Thx for looking
reg
Dirk

Doug,
Yep that's the ultimate gool i am aming at..
Last night a took 120 sec shots that also looked oke!
I will post them here.

reg
Dirk

--
Dirk van den Herik

A journey of thousand lightyears
starts with the first step.
"Doug W." wrote in message
. ..
Your recording good detail... now it's time to get to autoguiding and
longer sub exposures.... I think you will get some great shots.

--
Regards, Doug W.
www.photonsfate.com
--
"D van den H" wrote in message
bel.net...
M96
30 x 90 sec.
Here also a lot of moisture in the air (kendrick couldn't hold it much
longer after 30 x 90 sec...)
No autoguiding
10"SCT
Homebuild CCD camera.
No filters used.
MAXIMDL
CS2
for slight processing.
Thx for looking
reg
Dirk