Date   

Re: Image size at focal plane of an 155f7 EDFS

William L
 

2.7” = 68.6mm, so vignetting won’t be a problem. The diagonal of a full frame sensor is 36mm x 24mm, or 43mm, so 36mm filters would vignette. I use 2” filters for my full frame cameras, without any problems. 


Image size at focal plane of an 155f7 EDFS

marsh.family
 

Hi, hoping for some insight

I am considering a new camera/filter wheel and am wondering with the 2.7" focuser whether there would be vignetting for a full frame sensor.  Also, I'm wondering whether a 36mm filter would be wide enough to not vignette the light from the objective should I choose a full frame sensor. Or does one need the 2" filter.

Thanks,

Chris


Re: The Crab Nebula in SHO

skester@...
 

Thanks all for the positive feedback!


Re: The Seagull and the Seven Sisters.

skester@...
 

Love the colors on that Seagull Alex, beautiful result.

Scott


Re: The Seagull and the Seven Sisters.

Karen Christen
 

Wow, Alex.  Those are striking.

Karen

AP

 

From: main@ap-ug.groups.io <main@ap-ug.groups.io> On Behalf Of Alex
Sent: Monday, January 10, 2022 2:09 AM
To: main@ap-ug.groups.io
Subject: [ap-ug] The Seagull and the Seven Sisters.

 


After weeks of crap weather, I finally got a clear night which allowed me to finish a couple images.  

First off is the Seagull Nebula.

https://www.astrobin.com/f3ef8x/

I also grabbed some subs of the Pleiades while waiting for the Seagull to rise high enough.

https://www.astrobin.com/ucor2c/

Alex


Re: The Seagull and the Seven Sisters.

Roland Christen
 

That is a fine image of the Seagull!

Roland

-----Original Message-----
From: Alex <groups@...>
To: main@ap-ug.groups.io
Sent: Mon, Jan 10, 2022 2:09 am
Subject: [ap-ug] The Seagull and the Seven Sisters.


After weeks of crap weather, I finally got a clear night which allowed me to finish a couple images.  

First off is the Seagull Nebula.

https://www.astrobin.com/f3ef8x/

I also grabbed some subs of the Pleiades while waiting for the Seagull to rise high enough.

https://www.astrobin.com/ucor2c/

Alex


Re: The Seagull and the Seven Sisters.

Ray
 

Awesome!  gorgeous image

Ray


Re: The Seagull and the Seven Sisters.

Stuart
 

What a great shot Alex!!!

Stuart 

On Mon, Jan 10, 2022 at 3:09 AM Alex <groups@...> wrote:

After weeks of crap weather, I finally got a clear night which allowed me to finish a couple images.  

First off is the Seagull Nebula.

https://www.astrobin.com/f3ef8x/

I also grabbed some subs of the Pleiades while waiting for the Seagull to rise high enough.

https://www.astrobin.com/ucor2c/

Alex


Re: The Seagull and the Seven Sisters.

Pete Lardizabal
 

Spectacular imagery Alex.

😎

Pete

On Jan 10, 2022, at 3:09 AM, Alex <groups@...> wrote:


After weeks of crap weather, I finally got a clear night which allowed me to finish a couple images.  

First off is the Seagull Nebula.

https://www.astrobin.com/f3ef8x/

I also grabbed some subs of the Pleiades while waiting for the Seagull to rise high enough.

https://www.astrobin.com/ucor2c/

Alex <seagull_nebula copy.jpg>


The Seagull and the Seven Sisters.

Alex
 


After weeks of crap weather, I finally got a clear night which allowed me to finish a couple images.  

First off is the Seagull Nebula.

https://www.astrobin.com/f3ef8x/

I also grabbed some subs of the Pleiades while waiting for the Seagull to rise high enough.

https://www.astrobin.com/ucor2c/

Alex


Re: Solar filter for 92mm Stowaway

midmoastro
 

https://www.astro-physics.info/tech_support/accessories/solar_acc/filter-size-chart.pdf


Re: The Crab Nebula in SHO

Ross Elkins
 

That’s a beautiful image! Great detail, for sure...

Ross Elkins






Re: My first scans of Jim's AP catalogs

M Hambrick
 

Thanks again Holger

Mike


Re: My first scans of Jim's AP catalogs

Holger
 

I have now uploaded the new files to the AP Catalog database site. The Jan. 1992 existed already as an identical version, but Nov. 1993 differed slightly from the former one of the same date, so that I kept both versions. The Nov. 1994 catalog appears to be released after the already existing Dec. 1994 catalog - in fact, the price list is dated to Jan. 1995, so that I simply booked it as a Jan. 1995 catalog.

The very early catalog may possibly be dated in between the 1984-1985 and the Oct. 1986 catalog, so that I gave it a preliminary tag '1985-1986?'. Perhaps the precise dates of release of these early catalogs will be clarified later ...

Cheers and thanks to Jim and Tony for their contributions!

Holger 


OT: CCD-Guide 2022

Bernhard Hubl
 

Hello astrophotographers,

The new CCD-Guide 2022 is available!

Information about CCD-Guide including ordering possibility can be found here:

www.ccdguide.com


Compared to the previous edition, the new version 2022 offers 374 new astrophotos and considerable software enhancements.

If you would like to learn more about the new features of the software, you are cordially invited to watch our free online presentation of CCD-Guide 2022 including live demonstrations of concrete application examples.

Date: Saturday, 2022-01-22 at 18:30 UT in English

Please send an informal email to bernhard.hubl [at] astronomie.at to register for the online presentation.


It is important to mention that the CCD-Guide team members work voluntary and all income is used exclusively to cover production costs or to support projects of our astronomy club Astronomischer Arbeitskreis Salzkammergut.


Have fun with the new CCD-Guide 2022!

 

Greetings from

Bernhard Hubl & CCD-Guide team

www.ccdguide.com


Re: The Crab Nebula in SHO

Pete Lardizabal
 

Marvelous image Scott!

😎

Pete

On Jan 8, 2022, at 11:55 AM, skester@... wrote:

I took advantage of the cold, clear and stable skies last night to try my first Hubble pallet image with M1 as the target.  The seeing was much better than expected, and guiding with the 1100GTO was exceptional at 0.3 arcsec for the entire run.  M1 was only visible for just over 2 hours due to the trees, but at F4 it seems to have been just enough.  Shot with my Quattro 300P/ASI2600MM, thanks for looking.

https://www.astrobin.com/full/3lz1rg/0/


Re: The Crab Nebula in SHO

Eric Weiner
 

We’ll done!


Re: The Crab Nebula in SHO

Stuart
 

That is a great shot!!!

Stuart 

On Sat, Jan 8, 2022 at 11:55 AM <skester@...> wrote:
I took advantage of the cold, clear and stable skies last night to try my first Hubble pallet image with M1 as the target.  The seeing was much better than expected, and guiding with the 1100GTO was exceptional at 0.3 arcsec for the entire run.  M1 was only visible for just over 2 hours due to the trees, but at F4 it seems to have been just enough.  Shot with my Quattro 300P/ASI2600MM, thanks for looking.

https://www.astrobin.com/full/3lz1rg/0/


Re: The Crab Nebula in SHO

Roland Christen
 

Excellent detail.

Roland

-----Original Message-----
From: skester@...
To: main@ap-ug.groups.io
Sent: Sat, Jan 8, 2022 10:55 am
Subject: [ap-ug] The Crab Nebula in SHO

I took advantage of the cold, clear and stable skies last night to try my first Hubble pallet image with M1 as the target.  The seeing was much better than expected, and guiding with the 1100GTO was exceptional at 0.3 arcsec for the entire run.  M1 was only visible for just over 2 hours due to the trees, but at F4 it seems to have been just enough.  Shot with my Quattro 300P/ASI2600MM, thanks for looking.

https://www.astrobin.com/full/3lz1rg/0/


The Crab Nebula in SHO

skester@...
 

I took advantage of the cold, clear and stable skies last night to try my first Hubble pallet image with M1 as the target.  The seeing was much better than expected, and guiding with the 1100GTO was exceptional at 0.3 arcsec for the entire run.  M1 was only visible for just over 2 hours due to the trees, but at F4 it seems to have been just enough.  Shot with my Quattro 300P/ASI2600MM, thanks for looking.

https://www.astrobin.com/full/3lz1rg/0/

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