Perfect! I always set subtitles ON, for movies anyway. And like most tutorials, one should not expect to see it only once. Multiple reviews while taking notes is the order of the day... (retired teacher here) Thanks for putting in the edit time to produce this. NOW... to go promote it on Cloudy Nights. Cheers
This is a really good video - now if there were a spoken commentary I could print the transcript!😂 Just watched it again slowed to 50% so my aging brain can take it in. Thanks again.
Thank you. Yeah, I had thought about spoken commentary, but wanted to make these videos something you could play while potentially around others - so just went with the silent approach (accepting the limitations it comes with).
when selecting your flats, darks, and bias frames do they all have to match in terms of the exposure times? for example.. if i choose a 10 second flat do I also have to choose a 10 second dark and 10 second bias?
It's important to match camera gain and temperature. Your Dark needs to match your Light frame for exposure time, gain and temperature of camera. Your Bias - if doing traditional Bias frame - is the shortest exposure time for the most you can stack (20 or 50). It matches your Light frame for camera gain and temperature. Your Flat is just the exposure time that gives you the correct AVG ADU at a stack of 20 or 50. It matches your Light frame for camera gain and temperature. A Dark Flat/Flat Dark is just a Dark frame that matches your Flat frame for exposure time and stack (20 or 50). I don't use Bias frame with my camera (ASI294MC Pro) so I change my Bias settings so they are actually Dark Flat/Flat Dark. Again - done at same camera gain and temperature.
If you take three sets of bias frames which one do you add to your target set? Can you add all three? I"m trying to understand how this gets to be a dark flat/Flat dark to work with my 294
You can only choose one Bias frame. However - what I showed was using the Bias section but making sure to adjust the settings of my Bias frame so that it acts as a Flat Dark/Dark Flat rather than a traditional Bias frame (because traditional bias frames are no good for the ASI294MC/ASI294MC Pro camera.
I do everything exactly like the video says to but when I go to shoot a target I get a message that says my flats and lights are different sizes and will only let me shoot with the darks and bias. I use a 294mc on a Celestron 8se set.
Just to check are you shooting your Lights in Live Mode like I show in the video? If you take your Flats in Live Mode I don't think you can use those flats in any other mode (such as Autorun) and vice versa. Also: 1. Make sure you take your Flat frame with the same gain you intend to shoot your Lights. 2. Make sure you take your Flat frame in Live Mode on the night but before you take your Lights. 3. You need to make sure you are in focus (i.e. you will want to setup, get your rough daytime focus, then better night time focus, then polar align, then refine your focus) BEFORE you take your Flat frame. 4. Make sure your camera is set to the same temperature - and has stabilised to that temperature - that you will be use for your Lights. e.g. for me my camera is cooled to 0°C.
Apologies. I did think about having longer time for the text - but the video already goes for quite a long time. I just assumed people would just pause the video at the points they needed. That being said - I am trying to continually improve and do need to work on my editing skills. So will make a note of that for any future videos.
It's actually a choice I've decided to go with to not add any spoken commentary or background sound/music. I wanted to make it possible to watch videos even if you're at a camp site or astro party etc so it doesn't disturb others and you don't have to wear headphones, etc etc. Also - my voice is just horrible on my quite old headset microphone. I would need to buy an external microphone.
Perfect! I always set subtitles ON, for movies anyway. And like most tutorials, one should not expect to see it only once. Multiple reviews while taking notes is the order of the day...
(retired teacher here)
Thanks for putting in the edit time to produce this. NOW... to go promote it on Cloudy Nights. Cheers
You're welcome! Glad it could be helpful.
This is a really good video - now if there were a spoken commentary I could print the transcript!😂 Just watched it again slowed to 50% so my aging brain can take it in. Thanks again.
Thank you. Yeah, I had thought about spoken commentary, but wanted to make these videos something you could play while potentially around others - so just went with the silent approach (accepting the limitations it comes with).
when selecting your flats, darks, and bias frames do they all have to match in terms of the exposure times? for example.. if i choose a 10 second flat do I also have to choose a 10 second dark and 10 second bias?
It's important to match camera gain and temperature.
Your Dark needs to match your Light frame for exposure time, gain and temperature of camera.
Your Bias - if doing traditional Bias frame - is the shortest exposure time for the most you can stack (20 or 50). It matches your Light frame for camera gain and temperature.
Your Flat is just the exposure time that gives you the correct AVG ADU at a stack of 20 or 50. It matches your Light frame for camera gain and temperature.
A Dark Flat/Flat Dark is just a Dark frame that matches your Flat frame for exposure time and stack (20 or 50). I don't use Bias frame with my camera (ASI294MC Pro) so I change my Bias settings so they are actually Dark Flat/Flat Dark. Again - done at same camera gain and temperature.
If you take three sets of bias frames which one do you add to your target set? Can you add all three? I"m trying to understand how this gets to be a dark flat/Flat dark to work with my 294
You can only choose one Bias frame.
However - what I showed was using the Bias section but making sure to adjust the settings of my Bias frame so that it acts as a Flat Dark/Dark Flat rather than a traditional Bias frame (because traditional bias frames are no good for the ASI294MC/ASI294MC Pro camera.
I do everything exactly like the video says to but when I go to shoot a target I get a message that says my flats and lights are different sizes and will only let me shoot with the darks and bias. I use a 294mc on a Celestron 8se set.
Just to check are you shooting your Lights in Live Mode like I show in the video? If you take your Flats in Live Mode I don't think you can use those flats in any other mode (such as Autorun) and vice versa. Also:
1. Make sure you take your Flat frame with the same gain you intend to shoot your Lights.
2. Make sure you take your Flat frame in Live Mode on the night but before you take your Lights.
3. You need to make sure you are in focus (i.e. you will want to setup, get your rough daytime focus, then better night time focus, then polar align, then refine your focus) BEFORE you take your Flat frame.
4. Make sure your camera is set to the same temperature - and has stabilised to that temperature - that you will be use for your Lights. e.g. for me my camera is cooled to 0°C.
But i can slow it down - I need to do this
At the bottom of the youtube screen there is a settings icon that allows adjustment of playback speed
Apologies. I did think about having longer time for the text - but the video already goes for quite a long time.
I just assumed people would just pause the video at the points they needed.
That being said - I am trying to continually improve and do need to work on my editing skills. So will make a note of that for any future videos.
Maybe add a spoken commentary?
It's actually a choice I've decided to go with to not add any spoken commentary or background sound/music.
I wanted to make it possible to watch videos even if you're at a camp site or astro party etc so it doesn't disturb others and you don't have to wear headphones, etc etc.
Also - my voice is just horrible on my quite old headset microphone. I would need to buy an external microphone.
I can’t read that fast!
Sorry. I'll make a note for any future videos I do (not just for astronomy) to have a bit more time on the text screens.