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.

sgl_imaging_challenge_banner_30_second_exp_2_winners.thumb.jpg.b5430b40547c40d344fd4493776ab99f.jpg

davhei

Sketching bright stars

Recommended Posts

Made an attempt to sketch a few of the brighter stars, seeing as the full moon was out and the sky wasn’t suitable for deep sky observing.

Experimented with diffraction spikes on Vega, Capella and Arcturus to get a nice bright look to imitate the view through the reflector scope. Overall very enjoyable!

 

58EA9958-5C5F-4367-BA58-2E92C6B8A71B.jpeg

3F4B8C30-A028-4BB4-B176-58AA25F3D600.jpeg

0A4F6D6D-277D-46D4-A3FB-838589902CDF.jpeg

  • Like 10

Share this post


Link to post
Share on other sites

Lovely work, Davhei and a joy to see some stars on these rainy days in Spain ⛈️🌧️⛈️ Think you've worked your technique with the diffraction spikes to a tee 👍

  • Like 1

Share this post


Link to post
Share on other sites

Thanks Rob, a toothpick really helps to get the thin lines. I believe someone on this forum provided the inspiration, can’t recall who it was though. Anyway it works well and I will thank that person if I run into the post again.

  • Thanks 1

Share this post


Link to post
Share on other sites

Wonderful sketches. Making them must help to really know these star fields.

  • Like 1

Share this post


Link to post
Share on other sites
2 hours ago, Ruud said:

Wonderful sketches. Making them must help to really know these star fields.

Thank you Ruud. Yes indeed, it really adds a dimension to observing.

I see some people add a touch of colour to their sketches as part of the finishing at home. Have to try that at some point, probably fairly simplistic on a phone app, me not being into photoshop and the like. Looks great for colorful stars.

  • Like 1

Share this post


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

some people add a touch of colour to their sketches

Yes, it would look nice if you did that with your star sketches. You should try the freeware GIMP.

I imagine this is how it would work in GIMP: open your scan or photo. Add an empty layer, change its blend mode to colour and paint an orange blob on the empty layer over Arcturus. Anything underneath the blob that is not black or white will take on the colour you used.

I did this in Photoshop using a rather tacky highly saturated orange-red for Arcturus:

1006032024_ColouredArcturus.thumb.png.46b6770ce7b58cff5419bf11dd0840b3.png

The orange blob is bigger than the star, but that does not matter because black and white are not affected.

I should add: the original was a grey scale image, so my first step was to convert it to RGB colour.

Some search terms to help you find the right tutorials: GIMP change image mode to RGB, GIMP add new layer, GIMP change blend mode of layer, GIMP save as png.

Good luck. Get GIMP and get going. It is an excellent tool for this task.

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites
33 minutes ago, Ruud said:

Yes, it would look nice if you did that with your star sketches. You should try the freeware GIMP.

I imagine this is how it would work in GIMP: open your scan or photo. Add an empty layer, change its blend mode to colour and paint an orange blob on the empty layer over Arcturus. Anything underneath the blob that is not black or white will take on the colour you used.

I did this in Photoshop using a rather tacky highly saturated orange-red for Arcturus:

1006032024_ColouredArcturus.thumb.png.46b6770ce7b58cff5419bf11dd0840b3.png

The orange blob is bigger than the star, but that does not matter because black and white are not affected.

I should add: the original was a grey scale image, so my first step was to convert it to RGB colour.

Some search terms to help you find the right tutorials: GIMP change image mode to RGB, GIMP add new layer, GIMP change blend mode of layer, GIMP save as png.

Good luck. Get GIMP and get going. It is an excellent tool for this task.

 

That’s an awesome suggestion and a what a tutorial! Thanks for this Ruud, much appreciated!

Share this post


Link to post
Share on other sites

Great posts guys. I do love sketching stars too, (double stars in particular). But I've been a little disappointed that they don't match up to the brilliance I see for myself at the telescope, so I might have to give that toothpick idea a try too. 👍 (As well as that GIMP programme? I've been using the basic  "Paint" programme, so that would be interesting to try an alternative).

Thanks all.

  • Like 1

Share this post


Link to post
Share on other sites

Hi davhei, 

Can I ask how you invert the colours please, making the sky black and stars white? I'm a total novice at sketching so my knowledge is very limited! 

Many thanks, 

Mark 

Share this post


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

Hi davhei, 

Can I ask how you invert the colours please, making the sky black and stars white? I'm a total novice at sketching so my knowledge is very limited! 

Many thanks, 

Mark 

I use an app on my phone. There are probably many out there but I use pixlr.

I first snap a picture of the sketchpad, preferrably in overcast daylight, then adjust the colours to zero on the phone image editor to get greyscales. Load the image into the app, make a few adjustments to contrast and then invert the colours.

A more ambitious person could probably work miracles in photoshop but sadly I am not one of them. 😀

Edited by davhei

Share this post


Link to post
Share on other sites

That's great, many thanks!! 

I have just downloaded the app, and I'll be sure to have a play around with it as soon as I get some time. No doubt you'll see some of my future attempts around here! 

Thanks again, 

Mark. 

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • 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.