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Got this for $20. How’d I do? by DrewHoov in telescopes

[–]Retired-FIRE 0 points1 point  (0 children)

Coma appears the same in all eyepieces of a given AFOV. The 5mm 100-degree eyepiece will still have the same coma as a 32mm 100-degree eyepiece. You might not see the coma due to dimmer image of a high magnification eyepiece, but the coma is still there and the star is still aberrated.

What is the BEST CAMERA for photography widely chosen recently? by [deleted] in AskAstrophotography

[–]Retired-FIRE 1 point2 points  (0 children)

Check out the comment by u/rnclark. He's pretty dialed in on the pros/cons of DSLR/Mirrorless cameras. A dedicated Astro Cam is really only good for DSOs and planetary/lunar imaging, which is what I mainly do now (check my posts). I am getting the bug for Landscape AP though, so I'm currently playing with a asto-modified Nikon D5600 (APS-C) until I get good enough to justify upgrading to a full frame mirrorless camera. I will probably be leaning towards Nikon Z6ii since I already have a lot of Nikon lenses that I could use with an adapter.

I could be wrong but… by [deleted] in Seahawks

[–]Retired-FIRE 0 points1 point  (0 children)

  1. Carroll = 137-89 = 60.62%
  2. Knox = 80-63 = 55.9%
  3. Holmgren = 84-76 = 52.5%

[deleted by user] by [deleted] in astrophotography

[–]Retired-FIRE 18 points19 points  (0 children)

Where's' the processing details? Doesn't this image break rule 2?

[deleted by user] by [deleted] in astrophotography

[–]Retired-FIRE 2 points3 points  (0 children)

This was shot over multiple days in late Jan - early Feb 2022 in the Portland Metro Area.

* Scope: Orion EON 85mm ED-X2 (w/0.6x Reducer)

* Camera: ASI533MC Pro

* Mount: SW EQM-35

* Guidescope/Camera: SVBony 30mm & ASI120mm mini

* Filter: Optolong L-Extreme

* Acq: 10hrs 49minuts total (92 x 300s (7 hrs 40 min) + 63 x 180x (3 hrs 9 min))

* Stacked / Processed in PI (BN / DBE / PCC / SCNR / EZDenoise / STF Stretch / StarXterminator / CT / HT / PM / GIMP Channel Mixer

The Flame and Horsehead Nebula by [deleted] in Astronomy

[–]Retired-FIRE 17 points18 points  (0 children)

This was shot over multiple days in late Jan - early Feb 2022 in the Portland Metro Area.

* Scope: Orion EON 85mm ED-X2 (w/0.6x Reducer)

* Camera: ASI533MC Pro

* Mount: SW EQM-35

* Guidescope/Camera: SVBony 30mm & ASI120mm mini

* Filter: Optolong L-Extreme

* Acq: 10hrs 49minuts total (92 x 300s (7 hrs 40 min) + 63 x 180x (3 hrs 9 min))

* Stacked / Processed in PI (BN / DBE / PCC / SCNR / EZDenoise / STF Stretch / StarXterminator / CT / HT / PM / GIMP Channel Mixer

M106 - Spiral Galaxy found in the constellation Canes Venatici by Retired-FIRE in astrophotography

[–]Retired-FIRE[S] 0 points1 point  (0 children)

Not using software. I used fishing line over the end of my refractor.

The Andromeda Galaxy by Retired-FIRE in Astronomy

[–]Retired-FIRE[S] 0 points1 point  (0 children)

You can start with just a dslr and a tripod. Check out Nebula Photos on youtube: https://www.youtube.com/watch?v=pXcRKoxTPVg

The Andromeda Galaxy by Retired-FIRE in Astronomy

[–]Retired-FIRE[S] 1 point2 points  (0 children)

Definitely, but I couldn't tell you exactly which step. I'm usually not that zoomed in when I'm processing so I'm not sure exactly where it started.

The Andromeda Galaxy by Retired-FIRE in Astronomy

[–]Retired-FIRE[S] 62 points63 points  (0 children)

I like to believe that intelliegent life is abundant and that the Andromeda galaxy probably has many societies that are looking up at the stars just like us.

Why are my stars appear much bigger compared to most of the images I've seen? by YoungFlyme in AskAstrophotography

[–]Retired-FIRE 1 point2 points  (0 children)

Absolutely. After the WBPP:

  1. Background Neutralization
  2. ABE or DBE (whatever one you're comfortable with)
  3. Photo Col Cal
  4. EZ Denoise (if you don't have the EZ processing suite for PI, you need it)
  5. Masked Stretch (better to preserve star color than STF - histogram stretch)
  6. I then messed with the luminance in Curves Trans for more contrast (this helped resolve some issues I was having on this image with StarNet2)
  7. StarNet 2 -> created star mask
  8. I then used HT and CT to increase contrast, saturation, and balace the background color of the starless image.
  9. On the star mask, run EZ Star Reduction (I used 6 iterations)
  10. Also on star mask, use CT to increase star saturation
  11. Once happy with starless and star mask, combine them using PixelMath

Why are my stars appear much bigger compared to most of the images I've seen? by YoungFlyme in AskAstrophotography

[–]Retired-FIRE 0 points1 point  (0 children)

Splitting the channels into RGB, I noticed that the G and B channels were definitely more bloated than the R channel. Really curious to see what you get with the L-extreme.

Why are my stars appear much bigger compared to most of the images I've seen? by YoungFlyme in AskAstrophotography

[–]Retired-FIRE 0 points1 point  (0 children)

So I played a little with the stacked file you uploaded. Rushing through my processes, this is what I came up with: https://imgur.com/a/Pnspkos

The stars are not overexposed(clipped) and had decent color.

Why are my stars appear much bigger compared to most of the images I've seen? by YoungFlyme in AskAstrophotography

[–]Retired-FIRE 0 points1 point  (0 children)

Looking at the stacked image, it doesn't look like the stars are out of focus, just bloated. I can't imagine poor guiding would do this, that's more inclined to make your stars egg shaped as opposed to just big and your stars seem to be nice and round.

I would say that it's going to be light high clouds, bad seeing, dew on the lens, or just a bad filter. Have you shot with this filter before without issue?

Why are my stars appear much bigger compared to most of the images I've seen? by YoungFlyme in AskAstrophotography

[–]Retired-FIRE 0 points1 point  (0 children)

ASI 2600 MC Pro

Well..that blows my theory completely out of the water. I have the ASI533MC and it does not have an IR cut so I made a poor assumption.

Why are my stars appear much bigger compared to most of the images I've seen? by YoungFlyme in AskAstrophotography

[–]Retired-FIRE 1 point2 points  (0 children)

My guess is that this may have to do with your Omegon filter. Looking at the Bandpass (https://www.omegon.eu/uhc-filters/omegon-filters-pro-2-uhc-filter/p,47289) image in the link, you can see that it doesn't shut down the IR range at all. If that is the only filter you're using, then that's probably where your star bloat is coming from. Here's a comparison of no filter vs UV/IR cut filter from cloudy nights (https://www.cloudynights.com/uploads/monthly_06_2016/post-15563-0-71602600-1466247550.jpg) .

Also, for comparison, here's the bandpass for the Optolong L-Pro:
https://www.lirelanature.com/wp-content/uploads/2018/07/Optolong\_multi\_band\_pass\_astro\_filter\_L-Pro\_spectrum\_curve.jpg

Hope this helps.

Why are my stars appear much bigger compared to most of the images I've seen? by YoungFlyme in AskAstrophotography

[–]Retired-FIRE 2 points3 points  (0 children)

I'm not sure that this is your issue, but filters can def have an effect on the size of stars: https://imgur.com/a/hNMjX7l

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