Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

AstroShader iOS AP app: Intro + beta-testers wanted

Smartphone AP Software Astrophotography
  • Please log in to reply
484 replies to this topic

#476 joezerneem

joezerneem

    Lift Off

  • -----
  • Posts: 24
  • Joined: 31 Jul 2023

Posted 13 April 2024 - 01:07 PM

You're welcome!

 

I'm pretty sure the focus was optimal. I also checked the collimation of the Dobsonian before I started, which was perfect.

 

The max. exposure time with 40x magnification (lowest I can get with my 10 inch Dobsonian telescope) before getting star trails (untracked setup), seems to be around 0.333 sec.
However as a test, I can try using longer exposure times next session and see if this will prevent these alignment issues.

 

I didn't use the editing tools here, because all multiple exposure images (2x and 5x) failed with alignment.

 

I haven't tried using a different eyepiece with higher magnification (60x or 120x) yet, but this will give even less alignment stars (and therefore I assume more alignment issues). However, they may show better contrast between stars and background, so it may be worth trying anyway.

 

Any additional suggestions for testing are welcome.



#477 joezerneem

joezerneem

    Lift Off

  • -----
  • Posts: 24
  • Joined: 31 Jul 2023

Posted 14 April 2024 - 09:14 AM

Yesterday I got an unexpected opportunity to do some additional tests, despite the many veil clouds.
First I wanted to test whether an increased exposure time (ignoring star trailing) would improve upon alignment / stacking issues.

 

To prevent losing time, I started to point my telescoop pretty randomly to (a clear looking part of) the sky, with a few stars visible in the eyepiece.
Then I ran 3 series (exposure time 0.333, 0.666, 0.999 sec.) of 3 images with a single exposure, 2x exposure and 5x exposure.
You can see the results below. All the images seem to fail with 2 or 5 exposures.
For this forum, I had to compress the images to 400x300 jpg this time, I hope it is still usable.

 

After that, I tried the binning option (5 exposures with 0.333s exposure time) which appeared to be a great improvement (see image below).

 

I continued testing using binning with more exposures and this still worked well. I noticed Ursa Major looked pretty clear, so I pointed my telescope towards M51. I increased the number of exposures a few times with mostly good results and in the end, I managed to take a decent picture with 500 exposures total, with the reposition interval set to 100 (see picture below, edited with the Astroshader tools). The two galaxies M 51 and NGC 5195 are clearly visible as fuzzies.
Just in time before bigger clouds forced me to end my session.

Attached Thumbnails

  • iso_16000_0.333s_x1_13-Apr-2024_22.51.19.634.jpg
  • iso_16000_0.333s_x2_13-Apr-2024_22.51.52.342.jpg
  • iso_16000_0.333s_x5_13-Apr-2024_22.52.28.310.jpg
  • iso_16000_0.666s_x1_13-Apr-2024_22.57.06.690.jpg
  • iso_16000_0.666s_x2_13-Apr-2024_22.57.41.709.jpg
  • iso_16000_0.666s_x5_13-Apr-2024_22.58.24.698.jpg
  • iso_16000_0.999s_x1_13-Apr-2024_22.59.03.098.jpg
  • iso_16000_0.999s_x2_13-Apr-2024_22.59.48.013.jpg
  • iso_16000_0.999s_x5_13-Apr-2024_23.00.45.145.jpg
  • iso_16000_0.333s_x5_13-Apr-2024_23.02.43.578.jpg
  • iso_16000_0.333s_x500_13-Apr-2024_23.58.27.616.jpg

  • GSBass likes this

#478 TX Dave

TX Dave

    Lift Off

  • -----
  • Posts: 1
  • Joined: 02 Apr 2024

Posted 14 April 2024 - 10:14 PM

I am a total newbie to astronomy and astrophotography. I stumbled upon an AstroShader video on youTube. So glad I found this app. Super easy to use and works very well. I took this shot last night with my iPhone 13 and my SVBony MK105 telescope with a SVBony 20mm eyepiece and moon filter. 200 exposures. Sorry to interrupt this thread. I'm just excited to share my first image on Cloudy Nights.

moon3

Edited by TX Dave, 14 April 2024 - 10:16 PM.

  • GeezerGazer, Domdron and joezerneem like this

#479 GSBass

GSBass

    Cosmos

  • *****
  • Posts: 8,551
  • Joined: 21 May 2020
  • Loc: South Carolina

Posted 15 April 2024 - 04:06 PM

This was a photo i took last night with AstroShader and hestia, I think I had it set to stack 5,  no post processing,thought it looked nice, just resized to fit here so I sure it will rake a hit

Attached Thumbnails

  • IMG_4189.jpeg

  • GeezerGazer, joezerneem and TX Dave like this

#480 Josephus Miller

Josephus Miller

    Mariner 2

  • *****
  • Posts: 289
  • Joined: 16 Feb 2023
  • Loc: PA, USA

Posted 27 April 2024 - 06:22 AM

I've had this on my phone for like a year now but haven't done much with it. However, now that I have a) gotten a tracking mount, and b) read the instructions... wow! 

 

M3 from last night:

iso_494_6.999s_x5_26-Apr-2024_21.44.36.124.JPG

 

So much more than I could see in the eyepiece. I'll definitely be coming back to this soon. 


  • GeezerGazer, GSBass, astrshdr and 2 others like this

#481 joezerneem

joezerneem

    Lift Off

  • -----
  • Posts: 24
  • Joined: 31 Jul 2023

Posted 10 May 2024 - 08:39 AM

I captured the globular cluster M13 with higher magnitude (120x) this time. I managed to capture the images without using binning, but had to zoom in at least a bit, to get decent images.
Also M57 was captured this way.

 

The reposition interval was set to 25.

 

A small thing I noticed, is that the number of exposures in the file name stays the same when finalizing an image prematurely. For example, when I set the total number of exposures to 1000 and finalize after 200 exposures, the filename still shows x1000.

 

The images are edited with the Astroshader tools and GIMP.
Converted to .jpg and 25% compressed to fit on the forum.

 

Both images contain stars with magn. above 15! Visually, 13.5 to 14.0 is the absolute max. I can reach under these weather conditions.
I'm very pleased with the results, M57 even shows the red color in the edge of the ring, which I can't see visually!

 

- 10 inch Dobsonian (manual)
- Celestron Nexyz smartphone adapter
- iPhone 6S
- 10mm plössl eyepiece (magn. 120x).
- Bortle 6 sky

 

M57

- iso_16000_0.333s_x250_10-May-2024_01.54.26.032

 

M13

- iso_16000_0.333s_x500_10-May-2024_00.22.29.836

 

 

Attached Thumbnails

  • iso_16000_0.333s_x250_10-May-2024_01.54.26.032_M57_25perc.jpg
  • iso_16000_0.333s_x500_10-May-2024_00.22.29.836_M13_25perc.jpg

  • GeezerGazer, Pinac, astrshdr and 1 other like this

#482 GeezerGazer

GeezerGazer

    Surveyor 1

  • *****
  • Posts: 1,792
  • Joined: 06 Jan 2005
  • Loc: Modesto, CA

Posted 10 May 2024 - 03:10 PM

I captured the globular cluster M13 with higher magnitude (120x) this time. I managed to capture the images without using binning, but had to zoom in at least a bit, to get decent images.
Also M57 was captured this way.

Joe, 

Those are excellent phone images, especially from a non-tracked mount!  Very nice job.  waytogo.gif

 

I was out last night too, and managed a couple of images at 1s/300 @ ISO 16000 of both M13 and M57.  A tracking mount permits more latitude in settings, but because of mount malfunctions last night, I limited the exposure to 1s.  frown.gif   The image of M57 clearly shows the central star at magnitude 15, which is impossible to see visually with only 8" of aperture.  This was taken through an APM eyepiece at 15.4mm, and this image was cropped quite heavily for this scale.  Like you, next time, I'll use a bit more magnification.  bangbang.gif   Click on the image for a bigger rendition.

 

iso_16000_1.0s_x300_09-May-2024_23.59.54.200 2.jpg


Edited by GeezerGazer, 10 May 2024 - 03:20 PM.

  • Bill Jensen, joezerneem and TX Dave like this

#483 GeezerGazer

GeezerGazer

    Surveyor 1

  • *****
  • Posts: 1,792
  • Joined: 06 Jan 2005
  • Loc: Modesto, CA

Posted 11 May 2024 - 12:00 PM

Here is a pretty good example of why AS is my goto night sky iPhone camera app.  The other night I took a photo of M13 with 100/1sec images through a C8 and 15.4mm eyepiece, on a tracking mount.  I compared it to photos I took in 2023 using NightCap in Stars Mode, which takes an automatic 10sec image, also from a tracking mount.  Both previous photos, taken with Stars Mode through an 8" Newt and a 125 EDL refractor looked very nearly identical, with the center of the cluster shaded with white light.  This does not happen with AS, which shows individual stars to the core for a more realistic image of the globular.  All of the previous photos I took of globs using Stars Mode in NightCap look about the same with a white core.  Stars Mode is convenient and fast, but it's not nearly as good as AS!  

 

Both of these images were converted to B&W for an equal appearance and put into the same orientation for a side-by-side comparison.  Click on the image to see detail. 

Ray

 

Screenshot 2024-05-11 at 9.29.43 AM.jpeg


  • eyeoftexas, astrshdr, Domdron and 3 others like this

#484 GeezerGazer

GeezerGazer

    Surveyor 1

  • *****
  • Posts: 1,792
  • Joined: 06 Jan 2005
  • Loc: Modesto, CA

Posted 12 May 2024 - 09:34 PM

Last night I was out taking photos using AS with a C8 and an APM Zoom at 15.4mm (no filter) until transparency fell off a cliff, but was able to get this decent image of the Dumbbell Nebula, M27, stacking 40, 8sec exposures at ISO 3026, post processing the PNG file of this image in AS to save as a JPEG.  It shows good detail with the central star visible.

 

Click on photo for details:

iso_3026_7.998s_x40_12-May-2024_01.07.03.245.jpg


  • eyeoftexas, astrshdr, Josephus Miller and 2 others like this

#485 astrshdr

astrshdr

    Developer - AstroShader App

  • *****
  • Vendors
  • topic starter
  • Posts: 131
  • Joined: 30 Nov 2022

Posted 16 May 2024 - 07:13 AM

I captured the globular cluster M13 with higher magnitude (120x) this time. I managed to capture the images without using binning, but had to zoom in at least a bit, to get decent images.
Also M57 was captured this way.

 

The reposition interval was set to 25.

 

A small thing I noticed, is that the number of exposures in the file name stays the same when finalizing an image prematurely. For example, when I set the total number of exposures to 1000 and finalize after 200 exposures, the filename still shows x1000.

 

The images are edited with the Astroshader tools and GIMP.
Converted to .jpg and 25% compressed to fit on the forum.

 

Both images contain stars with magn. above 15! Visually, 13.5 to 14.0 is the absolute max. I can reach under these weather conditions.
I'm very pleased with the results, M57 even shows the red color in the edge of the ring, which I can't see visually!

 

- 10 inch Dobsonian (manual)
- Celestron Nexyz smartphone adapter
- iPhone 6S
- 10mm plössl eyepiece (magn. 120x).
- Bortle 6 sky

 

M57

- iso_16000_0.333s_x250_10-May-2024_01.54.26.032

 

M13

- iso_16000_0.333s_x500_10-May-2024_00.22.29.836

Nice images!

 

Thanks for highlighting the exposure number vs filename issue - I'll get that fixed...


  • joezerneem likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics





Also tagged with one or more of these keywords: Smartphone AP, Software, Astrophotography



Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics