Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

StargeezerTim

Show us your one sub images!

Recommended Posts

And one for Williams Formula One fans

(In the middle of commentating for SKY at the Hungaroring F1 qualfying, he was hauled into the pits to sub for sick No.1 driver)

2.jpg.3426aa578f4abb37a7efa5446805a7b6.jpg

  • Like 1

Share this post


Link to post
Share on other sites

As silliness has taken over...

subway-rotisserie-style-chicken-footlong

Not that I would eat one with dead bird in it...

Edited by Stub Mandrel
  • Like 3

Share this post


Link to post
Share on other sites
1 hour ago, Stub Mandrel said:

Not that I would eat one with dead bird in it...

Fine image of the Eagle, but a bit bloated compared to the ones in the shop......

Michael

Share this post


Link to post
Share on other sites
6 hours ago, Knight of Clear Skies said:

Gauntlet picked up, challenge accepted, google image search engaged.

 

(Taken from here.)

Now that's hard to beat, a single sub image taken from a sub :) 

But I did find this

eG1qNW52MTI=_o_dr-evil-makes-his-demands-from-austin-powers-in-.jpg

Edited by Nigel G

Share this post


Link to post
Share on other sites
13 hours ago, ollypenrice said:

ORION%20400%20HRS%20WEB-M.jpg

Of course, I could be lying...

:icon_albino:lly

 

but still worth seeing.

Share this post


Link to post
Share on other sites

Back to normallity.

The original sub I posted but no processing, where has it gone? :icon_biggrin:

atiklights_122.thumb.jpg.c021237cd6119711175a340498b826c2.jpg

 

  • Like 1

Share this post


Link to post
Share on other sites
9 minutes ago, wxsatuser said:

Back to normallity.

The original sub I posted but no processing, where has it gone? :icon_biggrin:

 

 

Same here...where is it going...

 

IMG_1255.thumb.jpg.512582fb9b78eb8d0b2eabffb63193e0.jpg

  • Like 1

Share this post


Link to post
Share on other sites
13 hours ago, ollypenrice said:

ORION%20400%20HRS%20WEB-M.jpg

Of course, I could be lying...

:icon_albino:lly

Certainly beats my 30 second effort (50mm lens at f1.4).

23478699293_5ea664cf5b_z.jpg

Taking a quick timeout from the silliness, I enjoy single sub imaging and will experiment with it some more, especially when conditions are less than ideal. I like using the camera as an enhanced viewing device, helping me relate DSOs to their position in the sky. They are also good for making meaningful comparison shots (apparent size, relative brightness and colours). Here's a couple more I've taken:

30156262994_edfe700be8_b.jpg&key=99fdd4e

The Head of Draco (50mm lens, 235 seconds).

27175508270_dbefa0341f_h.jpg&key=bb351f2

(30 seconds with ED120 - I couldn't get guiding working that night, but at least the Goto was working well.)

  • Like 8

Share this post


Link to post
Share on other sites

No additions to this thread for 24 hrs so I am extending it to two sub images.

Here is my best two sub image:-

298214-3x2-940x627.jpg.7e12a09c70910d462f4e556751a74128.jpg

 

:dontknow::blob8::blob7::blob6::blob5::blob3::blob1:

Edited by StargeezerTim
  • Like 4

Share this post


Link to post
Share on other sites

1 x 1800 sec using Esprit 150 ED, QSI 683 and Astrodon 3nm Ha filter with plenty of cloud so all the other subs were dumped - I feel your pain :sad:

597f65de2fd68_Ha3nm_1800s_1x1_M27.thumb.png.b926d775d4da4c8a18fb1eb4f32004b9.png

  • Like 8

Share this post


Link to post
Share on other sites
32 minutes ago, steppenwolf said:

1 x 1800 sec using Esprit 150 ED, QSI 683 and Astrodon 3nm Ha filter with plenty of cloud so all the other subs were dumped - I feel your pain :sad:

597f65de2fd68_Ha3nm_1800s_1x1_M27.thumb.png.b926d775d4da4c8a18fb1eb4f32004b9.png

30 minute sub! Thats a reasonable stack for me :glasses10:!

Dumping 5 min subs makes me sad... if i had to dump 30 minute subs I would be well upset... :clouds1:.

  • Like 1

Share this post


Link to post
Share on other sites
44 minutes ago, StargeezerTim said:

Dumping 5 min subs makes me sad... if i had to dump 30 minute subs I would be well upset... :clouds1:.

Trust me, I was WELL upset!!!! However, on the plus side, I do see some potential if the sky ever clears again in my lifetime!

  • Like 2

Share this post


Link to post
Share on other sites

Single 3600s image of Sh2-216 with Baader 3.5nM Ha filter. Probably the faintest thing I've ever tried to photograph. Maybe one night I'll get around to taking a few more.

Andrew

Sh2-216_Ha_1x1_20170124_2245_000003352_c_cc.jpg

  • Like 4

Share this post


Link to post
Share on other sites

Here is my effort.

1 x 1200 second Ha sub - ED80 - Atik 460

Wizard nebula - stretched in Pixinsight and slightly cropped in PS.

 

L_HydrogenHa_2016-11-27_18-18-56_Bin1x1.jpg

  • Like 7

Share this post


Link to post
Share on other sites

Its very rare that I take a 30min image, but I do have a few 20min subs kicking around:

M16 (130pds) 1200s

capture_5776.thumb.jpg.d870099475a245ab538e330fa3318ed8.jpg

 

A tangible whiff of integrated flux in one shot (Samyang 135mm, 1200s @f2):

Capture_4284.thumb.jpg.916f52863d75cdbdfe8dff5886ca11cf.jpg

 

  • Like 7

Share this post


Link to post
Share on other sites
8 hours ago, andrewluck said:

Single 3600s image of Sh2-216 with Baader 3.5nM Ha filter. Probably the faintest thing I've ever tried to photograph. Maybe one night I'll get around to taking a few more.

Andrew

Sh2-216_Ha_1x1_20170124_2245_000003352_c_cc.jpg

An hours sub! I tried 15 mins this week for the first time. Your stars are round, even after an hour... :hello2:

Share this post


Link to post
Share on other sites
This sub from last October before cloud moved in, playing around with barlow on a marginal night in garden on the small bright planetary nebula IC2149 (Easter Egg Nebula) in Auriga.
Inset for comparison is a near IR image taken with the MMT on Mount Hopkins, Arizona.

APM 175mm Refractor (barlow to FL 8750mm)
Atik 414EX (mono) at -20'C / Bin 1x1
Lum 240sec sub
Artemis Capture

IC2149_240sec_1x1_L_frame1 inset 1000.jpg

  • Like 6

Share this post


Link to post
Share on other sites
6 hours ago, mikeyscope said:

the small bright planetary nebula IC2149

That ain';t bad for a single., you've got some structure coming through.

Share this post


Link to post
Share on other sites
On 29/07/2017 at 15:58, alan4908 said:

A single calibrated Lum sub of 600s of M51, unprocessed - apart from a DDP stretch, in order that you can see it !

597ca0684fe67_M51Lum600scalibrated.thumb.jpg.a789060a3a308a0568f00514748592cd.jpg

If anyone is interested, this is normally my thought process when examining individual subs:

1 I have couple of dust doughnuts that haven't been taken out by the flat. Although not ideal, I've found quite a good technique to eliminate these in PS. 

2. I also have quite a few hot pixels, although these would be taken out through the subsequent stacking process (since all my subs are dithered). However, the number of hot pixels indicates that it's time for me to take some more dark frames (I haven't taken them for more than 7 months). 

3. I have a slight gradient which I presume is caused by the moon, since I image from a low light pollution area.  This is not a problem, since when the images are stacked, I'll use DBE to remove this. 

4. The aspect ratio of the stars is very good (I normally put all my subs through CCDInspector in order to check things like aspect ratio, average FWHM etc etc.).  Since I now image unguided, I focus particularly on the star aspect ratios, if these rise, then it might be an early indicator that a new sky model is required.

5. The average star has a FWHM of 4.2pixels, measuring a few individual stars seems to confirms this, so at my imaging scale, this indicates that the seeing is about 2.9 arc seconds, which is about average for my site. 

6. The stars and galaxy doesn't appear to be causing any camera saturation.

Alan

On point 1 Alan, what technique do you use?

thanks

Share this post


Link to post
Share on other sites

Testing out the new (as it was then) imaging kit in Spring last year, from the beautiful skies of North Cornwall...ED80 with canon 1100d, guided by a Synguider autoguider through an ST80, all on an HEQ5.

If memory serves, I think it was a 15 minute shot of M101, a 10 minute shot of M51, and a 5 minute image of M81 (and what I thought was M82 from the test shot I'd taken before this one! :D) all at ISO 1600.  The framing leaves a little bit to be desired...  No processing on these.

Life's been a bit bumpy since then so I've yet to get really stuck into stacking large numbers of subs, but I'm spending a bit of time looking at Stellarium to see what I want my first big project to be. :hello2:

Messier.101.JPG

Messier_51.JPG

Messier_81.JPG

Edited by Delboy_Hog
  • Like 5

Share this post


Link to post
Share on other sites
1 hour ago, ampleamp said:

On point 1 Alan, what technique do you use?

Hello

In order to eliminate dust donuts in PS I use a technique from one of Adam Block's tutorial videos, it can also be used to remove scattered light issues. The video, which I would highly recommend, is here: http://www.adamblockphotos.com/store/p7/Dimensions_of_Photoshop_by_Adam_Block.html

It's difficult to explain the technique in textual form, so I would really recommend buying the video, however, here's an attempt at an explanation - be warned this may sound complicated :happy11:

Your goal is to replace the defective area with a new background area that doesn't show any defects.

1. Open up the image in PS.

2. Make a copy of the image in the upper layer.

3. Make a selection around the problem area, the selection should be quite a bit larger than the defective area.

4. Move the mouse over the selected area and right click the mouse button - a menu will appear. Select Fill from the menu. Another menu will appear. In the contents box, choose context aware fill and click OK.

5.  At this point your defect will have disappeared since it will have been replaced by a new background, unfortunately, this includes false stars etc which now have to be eliminated.

6.  Select the spot healing brush and put it into context aware mode.  Click on each of the false stars etc within the selection area until you just end up with just a  background. 

7.  With the selection active, click on the mask icon.  On the top layer you should end up with a black mask with the selected area in white. 

8.  Click back on the top image and go to select and reselect. The selection you made previously will reappear. 

9. Turn the opacity slider down on the top layer to something like 50% - this will allow you to see the real stars etc in the selection area.

10. Select the mask and click on the paint brush icon with a hard brush and paint with black on the mask. Paint on the mask at all the points of the real stars. Basically, you are poking holes in the mask, so be careful where you poke since you don't want to let any of the defects through !

11. Put the opacity slider back to 100% and you are done.

Alan

 

 

  • Like 3

Share this post


Link to post
Share on other sites

OK, M31, Lum, single 3600 second at f5, it's a bit blown out in the core for some reason:icon_biggrin:

m31-deep_3600sec_1x1_L_frame1.thumb.jpg.3f81130ee95c3c1a5b222530c1aabae1.jpg

  • Like 3

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.