How much exposure time do I need? Use my free SNR app!

#astronomy #astrophotography #neuralnetwork #gimp #rstudio #photography #machinelearning #free #celestron #zwo #siril

Try the tool I made! Download it from GitHub here:

For those interested, here is the gear I use (or equivalent; Orion has discontinued some of their products, so the equivalent skywatcher products are listed). Most of the links are Amazon Affiliate links. Thanks!

[ByquPL]

I have subscribed your channel faster than one can say "WOW man, this is superb!"

[JohnICGomes]

Great video and awesome web app. Would be great to make this into a iOS app.

[mohicanspap]

I hope this tool gets more developed over time. Such a great thing to have especially for beginners or even professionals. Also with the camera I have I don’t use bias frames but dark flats. Hopefully there will be an option for those in the future. Great work!!!

[monkeypuzzlefarm]

Fantastic video! I can't believe how quickly you whipped up that app!

[yervantparnagian]

Very interesting. Thank you for your work. I suspect, seeing most everyone uses some type of filter, the hours of integration/exposures will go up exponentially.

[AntonioPena]

James, definitely after watching your video looking to use your application, thanks for reviving Craig. Good job!

[yougoattube]

Hats off to you, sir! I've made a small donation to help the cause along, and to encourage others who might want to contribute to the astrophotography/astronomy community. Many thanks! PS - I also subscribed to your channel.

[Graeme_Lastname]

I have just recently "discovered" your channel. I'm very interested this and all that goes with it. Looking forward to the next one. Thanks m8. 😃 🇦🇺 🖖

[mikehardy]

This should prove very useful to a newbie, who probably oversamples.

[stefan_astro]

Really cool app! Thank you for creating it. I will try it out myself aswell!

[anata]

Superb! I will try this. Thanks for your efforts.

[viewintospace]

Thanks a lot! Amazing video and amazing app!!! Really cool stuff!

[marvinwhisman]

Great video. Thanks so much for your work and contributions to the community.

[mehensley]

Thanks for the informative video. How would you gather the mean ADU value in PixInsight for a selected area? I know how to collect the mean value for the entire frame, but I need help finding how to do it for a designated area. Dynamic Crop, maybe?

[Thommy]

Great work, awesome video. Thank you very much!

[Nabby]

Well done! One question: how is quantum efficiency of a camera taken into account? The shot noise originates from Poisson distribution of photons. Are you assuming that the quantum efficiency is something like 85% and then taking that into account?

[chrisschomburg]

Nice tool and great designed Video. Well done. Maybe you want to check your exposures. The graph of your camera showed 1.9e readnoise, not 0.9e.

[HaakonRasmussen-ro]

Thank you for Videos and Apps! Is most appreciated. What makes me very sad ist to see the exposure time i need to get an SNR of 50 under Bortle 5 skies( Mag 20). 144 hours when i use 60s frames. But the exposure time depends a lot on how i frame when i get the statistics. I used a small galaxy NGC3184, and when i only framed a part of the galaxy i got an exposure time of 27 hours, when i framed in more than the galaxy, i got an exposure time of 144 hours! So what do you think regarding how to obtain statistics from light frames? I used Siril by the way.

[TRUSTKOREA]

Siril's statistics show 4digit mean number but in Pixinsight, it shows like 00.000 Does anybody know how to change this number to 4 digit number like Siril to apply to this app?

[DKelly]

Thanks, this sounds like a great tool. Do you know how I would relate camera gain (I assume you are using an Astro-camera) to ISO on a one-shot-color camera?