Date   

Re: Barnard 150- The Serpent

Chris White
 

Joel,

The developer has plans to make a PI module of starxterminator as well.  


Re: IC1396 Narrowband Ha

carlburton2001
 

Hi Roland
Really really nice stuff.  Looking forward to the O3 data

Carl


Re: Off-the-shelf adapters for Stowaway flattener

Bill Long
 

The most viable way to do this would be to create minimum spacing adapters for the common threading in use today (M54, M68, M42, M48) but now you have a bunch of different reducers and flatteners to account for, and thus a huge pile of adapters. 


From: main@ap-ug.groups.io <main@ap-ug.groups.io> on behalf of Chris White <chris.white@...>
Sent: Friday, September 17, 2021 4:40 AM
To: main@ap-ug.groups.io <main@ap-ug.groups.io>
Subject: Re: [ap-ug] Off-the-shelf adapters for Stowaway flattener
 

[Edited Message Follows]

On Thu, Sep 16, 2021 at 10:32 PM, KHursh wrote:
26 working days. Ouch. Over 5 weeks

I wonder if AP would consider making a line of these adapters for their scopes.  Seems like there is a nice demand for adapting to M68 and M48 from both 3.27" or 2.7" thread.  I know I would be buying these and with PP costing $130 to $150 for these adapters (along with the 4 to 8 week lead time) it would be a welcome addition to the AP lineup.


Re: Stephan's Quintet

Ben Koltenbah
 

Nice job on these, Scott, particularly since you pulled them out of the corner of your frame.  I appreciate the colorful, yet not too colorful rendering.

The three larger galaxies of this quintet have always been challenging for me, and unfortunately I've probably missed out on imaging them with my new equipment this season.  I'm hoping to try again next year.

Best Regards,
Ben


Re: Stephan's Quintet

Stuart
 

Beautiful Scott!


On Fri, 17 Sept 2021 at 08:38, <skester@...> wrote:
This is a corner crop from subs I shot when centered on NGC7331, so a bit of a freebie.  Best viewed at full resolution, these guys are tiny.  Shot with my 12" Newt, ASI2600MM and AP 1100GTO.

https://www.astrobin.com/full/yba74q/0/

Scott


Re: Off-the-shelf adapters for Stowaway flattener

Bill Long
 

It was worse earlier in all of this mess. I think it approached 40 days at the peak. Before the COVID-19 pandemic it was about 10 days. So 26 might be tough to swallow, but the product is solid and has a good guarantee.


From: main@ap-ug.groups.io <main@ap-ug.groups.io> on behalf of KHursh via groups.io <khursh@...>
Sent: Thursday, September 16, 2021 7:32 PM
To: main@ap-ug.groups.io <main@ap-ug.groups.io>
Subject: Re: [ap-ug] Off-the-shelf adapters for Stowaway flattener
 
26 working days. Ouch. Over 5 weeks


Stephan's Quintet

skester@...
 

This is a corner crop from subs I shot when centered on NGC7331, so a bit of a freebie.  Best viewed at full resolution, these guys are tiny.  Shot with my 12" Newt, ASI2600MM and AP 1100GTO.

https://www.astrobin.com/full/yba74q/0/

Scott


Re: IC1396 Narrowband Ha

skester@...
 

Roland, the tracking accuracy of the Mach 2 demonstrated by the this image is just nuts, with only a six point model and while significantly overloaded.  Amazing.


Re: NGC925 - Not as easy object for AP155

skester@...
 

Nicely done John, I will have to add this galaxy to my future target list.


SpaceX from Charleston, SC

thefamily90 Phillips
 


Re: Off-the-shelf adapters for Stowaway flattener

Chris White
 
Edited

On Thu, Sep 16, 2021 at 10:32 PM, KHursh wrote:
26 working days. Ouch. Over 5 weeks

I wonder if AP would consider making a line of these adapters for their scopes.  Seems like there is a nice demand for adapting to M68 and M48 from both 3.27" or 2.7" thread.  I know I would be buying these and with PP costing $130 to $150 for these adapters (along with the 4 to 8 week lead time) it would be a welcome addition to the AP lineup.


Re: NGC925 - Not as easy object for AP155

Stuart
 

Good to have that done sooner than later. Where is it located (roughly). Getting cold at night here (S. Ontario).


On Fri, 17 Sept 2021 at 00:02, John Jennings <johnrogerjennings@...> wrote:
Stuart,

The small pixels seem to help for sure. It's make collimation of the flattener somewhat difficult. I had a full frame on it but changed to my QHY268C just before installing in a remote observatory. It relieved the burden of collimation a little until I could get all the other systems bullet proof. I will be installing a QHY600C full frame color in the next several months. I will have to deal with the collimation demon again and it has the same 3.76U pixels as the 268C.  I'll be visiting the observatory in a couple of weeks to stay overnight and put a collimation tweak on the 155. It requires an overnight visit in the boonies with no facilities and a sleeping bag on the floor of the warm room. 

John


Re: Off-the-shelf adapters for Stowaway flattener

ROBERT WYNNE
 

With regard to Precise Parts prices. You have to realize that each part requires a top knotch machinist, his set up time (usually twice as long as it takes to machine a part) and the cleanup time. Then there's anodizing and shipping all the while somebody is keeping track of your part. If you just think of the price in terms of the time it takes to machine the part you're miss 2/3 rds of the total time involved to process your part and then the user of these parts expects perfection. -Best, Robert

On 09/16/2021 6:53 PM KHursh via groups.io <khursh@...> wrote:


I don't mind using Precise Parts other than the unknown length of time to wait for them.


Re: NGC925 - Not as easy object for AP155

John Jennings
 

Stuart,

The small pixels seem to help for sure. It's make collimation of the flattener somewhat difficult. I had a full frame on it but changed to my QHY268C just before installing in a remote observatory. It relieved the burden of collimation a little until I could get all the other systems bullet proof. I will be installing a QHY600C full frame color in the next several months. I will have to deal with the collimation demon again and it has the same 3.76U pixels as the 268C.  I'll be visiting the observatory in a couple of weeks to stay overnight and put a collimation tweak on the 155. It requires an overnight visit in the boonies with no facilities and a sleeping bag on the floor of the warm room. 

John


Re: Barnard 150- The Serpent

Chris White
 

That's pretty cool, but kinda cheating ;^))
 
Rolando


All post processing is kind of cheating...lol...


Re: Barnard 150- The Serpent

Joel Short
 

On Thu, Sep 16, 2021 at 08:29 PM, Chris White wrote:
Joel,

Check out this plugin for PS:  https://www.rc-astro.com/resources/StarXTerminator/index.php

I just started playing with it tonight, but it looks to be a winner. I'm a PI guy, so I just loaded my image in PS so I could remove the stars and then back to PI.  Did a much better job than starnett++ and resulted in hardly any objectionable artifacts.  Also didnt require the fancy AB techniques to remove star halos, etc... I'm still just toying with it, but it looks to be a winner. 
Yeah I saw that and it looks really good.  I sort of dismissed it being a Photoshop plugin as I also use PI.  But I have a good image to test it on so I'll probably get the trial.  
joel


Re: Off-the-shelf adapters for Stowaway flattener

KHursh
 

26 working days. Ouch. Over 5 weeks


Re: Barnard 150- The Serpent

Roland Christen
 

That's pretty cool, but kinda cheating ;^))

Rolando

-----Original Message-----
From: Chris White <chris.white@...>
To: main@ap-ug.groups.io
Sent: Thu, Sep 16, 2021 8:29 pm
Subject: Re: [ap-ug] Barnard 150- The Serpent

On Sat, Sep 4, 2021 at 10:15 AM, Joel Short wrote:
And I'm definitely going to try Starnet/Exponential Transformation on my next image.  I never thought of using ET on starless images but that's pretty much exactly what ET is built for.  I've experimented with starless images before, but I always have trouble bringing the stars back into the image so that it looks natural, without weird artifacts.  Do you use masks, or just some sort of "maximum" combine using PixelMath?  
 
Glad you like the bubble level.  I use it all the time myself.
joel
Joel,

Check out this plugin for PS:  https://www.rc-astro.com/resources/StarXTerminator/index.php

I just started playing with it tonight, but it looks to be a winner. I'm a PI guy, so I just loaded my image in PS so I could remove the stars and then back to PI.  Did a much better job than starnett++ and resulted in hardly any objectionable artifacts.  Also didnt require the fancy AB techniques to remove star halos, etc... I'm still just toying with it, but it looks to be a winner. 


Re: IC1396 Narrowband Ha

Roland Christen
 

No guiding. I have guide corrections turned off but monitoring the tracking graph. I'm using a 6 point Dec arc model created with the keypad drift model routine. I created the model this afternoon while the sun was still up by putting a bright star on the crosshairs and measuring the drift according to the model routine. I used an Ha filter which darkens the sky but allows me to capture stars as faint as magnitude 5 on my crosshair in MaximDL.

It's super easy, and any fool can do it, especially an old fool like me. 6 points along the Dec arc of the object allows the model to create a smooth tracking rate compensation, which for this object varies from about 45 arcsec/hr to close to zero around the meridian.
In any case, the resultant drift is so low, less than 1 arc sec per hour, that I could take 1 hour exposures and have perfectly round stars.

Rolando

-----Original Message-----
From: Michael Freeberg <mdfreeb@...>
To: main@ap-ug.groups.io
Sent: Thu, Sep 16, 2021 8:59 pm
Subject: Re: [ap-ug] IC1396 Narrowband Ha

Are you doing any guiding with this setup, or is all based on a sky model.

Mike

On Sep 16, 2021, at 8:56 PM, Roland Christen via groups.io <chris1011@...> wrote:

I'm having trouble visualizing that.
I see a little Teddy bear off to the upper right. For the life of me I don't see an Elephant Trunk. Just looks like a giant flying monster to me.

Rolando



-----Original Message-----
From: ROBERT WYNNE <robert-wynne@...>
To: main@ap-ug.groups.io; Roland Christen via groups.io <chris1011@...>; main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Thu, Sep 16, 2021 8:29 pm
Subject: Re: [ap-ug] IC1396 Narrowband Ha

It almost appears that a pool of water drained to the right and then poured to the right and out of the universe. -Best, Robert
On 09/16/2021 3:39 PM Roland Christen via groups.io <chris1011@...> wrote:


I managed to get 6 x 20 minute H-a exposures with the 10" Mak Astrograph on the fully loaded-for-bear Mach2 mount. All exposures were unguided and stacked in MaximDL. Processed in Maxim DL and Photoshop.


It's a beginning, and I hope to add more exposures as well as more OIII and SII subs for a final color image. These are very faint and have a fair amount of noise that will present quite a challenge. I'm not ready to show it to the world at full resolution (image is reduced to 80%), so this is a preview only.

Rolando


Re: Off-the-shelf adapters for Stowaway flattener

Bill Long
 

They tell you how many days to ship before you buy and email you with the exact date right after you buy. 


From: main@ap-ug.groups.io <main@ap-ug.groups.io> on behalf of KHursh via groups.io <khursh@...>
Sent: Thursday, September 16, 2021 6:53 PM
To: main@ap-ug.groups.io <main@ap-ug.groups.io>
Subject: Re: [ap-ug] Off-the-shelf adapters for Stowaway flattener
 
I don't mind using Precise Parts other than the unknown length of time to wait for them.

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