Win a Pentax Limited Lens: Raffle Now Live!

Dear Pentaxian astrophotography group fellows,

to test some actual hypothesis of mine on the perceptibility of gas spectra emission spectra for unmodified (Pentax) DSLR cameras I would like to ask you if you can contribute some data of yours. This would help to have a more representative an less biased basis for my test.

I would need linear data (best) or prestretched data (second best) of Ha/OIII targets where the color of the target was not yet changed/edited. Final images are also welcome if the color tones/values are not changed but may be only color intensified.
For the test I am looking for images of targets like the Rosette, Pacman, Eta Carina, Veil, Lagoon Nebula etc. which (in my system) appear redish/magenta/pinkish after the first stretching and before color management.

I would be very glad if you contacted me via PM or within this thread so we can arrange how to transfer the large files (dropbox, ICloud, IDrive, WeTransfer etc.). I will not disclose your data unless I have finished my test and not without having asked for your permission.

Cheers
Pete

Just to understand Peter, you need images taken with Ha or OIII filters?

Here's some in this: Dropbox - SomeTifs - Simplify your life

All in there are either with the K3 or K1 both full size and crop mode.

No, Keld, I just need "normal" images from out of your Pentax. I the first run not the single frames but the stacked linear file or a stretched version of it that had not been modified in color tones.

Thanks a lot, Scotty! None of the two cams ist astromodified, right?


Pete

Nope, both are stock.

K-5iis, straight out of DSS, so unstretched. https://drive.google.com/open?id=1A7EK3tFqvX4l_4CFM0hEIkpPGeK99iB_

Excellent, I have the Cocoon Nebula, Soul and Pacman you can have. I just need to figure out how to remove the red/blue/green ‘waves’ on the stacked pictures.

let them be......I am pretty sure it will be OK for what I intend to do.....

Thanks a lot, Rick!

Keld, I think I used a misleading phrase.....my knowledge in English has truck-size holes .

With "let them be" I meant "let them be as they are, no need do do any corrections". I would really appreciate to get your data!
Pete

I'll provide links to my files in a PM later today, btw. your English is way better than my German (ich can Deutsch verstehen, aber wenn ich versuche Deutsch zu sprechen dann geht's schief)

I will see what I can create and contribute. Now to see if I can find these objects with my 300mm and get them in the frame.

Voilá :-)

Pacman: Dropbox - Pacman.tif
Cocoon: Dropbox - Cocoon Nebula.tif
Part of the Soul or the Heart Nebula: Dropbox - Soul Tiff.tif

Merci beaucoup ;-)