DRAMATICALLY Reduce Image Noise with Exposure Stacking (Sequator Tutorial)
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- čas přidán 3. 08. 2024
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Stacking multiple images to reduce noise is not a new concept and is one of the best ways to get a clean, high-detail image in low light without noise reduction software, providing you have enough time to capture multiple images. But, it isn't always easy. Today, we're covering a much easier way to stack astrophotography and astro landscape images than the classic photoshop method using free software called Sequator. We'll cover file prep and walk through all the Sequator settings to help you get to a point where you have a nice, clean image to further edit in your style.
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Relevant Links/Stuff Mentioned:
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🌐► Download Sequator: sites.google.com/view/sequato...
🌐► Option for the Apple folks: apps.apple.com/us/app/starry-...
📽️► If you want a deep dive on how to get the best low light performance out of your Sony camera: • ISO on Sony cameras is...
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Table of Contents:
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0:00 - Image stacking can be easier!
0:42 - Why would you stack exposures for noise?
3:26 - Capturing the files you need
4:43 - How many images should you take?
6:15 - Preparing your raw files for Sequator
15:13 - How to use Sequator for best results
24:41 - Let's see our results!
26:12 - A tip about stacking with panoramas
27:36 - Like, Subscribe, Hit The Bell & Share This Video!
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#danfox #foxandlens #astrophotography #sequator #imagestacking
I just realized that I edited out a couple Sequator tips by accident. So here they are: when you're using the brush to create your irregular mask, you can right click to remove part of your mask if you've made a mistake. Also, the mouse wheel controls the brush size. Took me way longer than I care to admit to figure those out 🤣
Hey, Dan. I know it's hard to come back after a break. I've been there. The best advice is to just jump in. Even a short chatty video is always welcome. 😊
I just found your channel and man, your ISO, histogram and zebra videos are EXCEPTIONAL! Hope you come back soon and teach us some more!
I thought I understood more of the topic than I did, but you showed me again that there is just so much more to learn, which is awesome!
I only started taking this hobby seriously in December and I know that this is the best hobby I've started yet. And by far the most expensive...😂
I appreciate the feedback. And yes, there's more to come and I do feel bad that I've been absent as of late. I didn't mean for my break to be this long.
WTF, how can this channel have only 1519 subscribers?! Anyway, here is 1520. you are a marvel of CZcams!
Appreciate it!
Hope you're planning to keep releasing videos Dan! These are some of the best-presented educational videos I've come across.
Thanks Jamie! I do fully intend to get back to it. This year has gotten away from me a bit with a bunch of life upheaval/change stuff - I don't intend that as an excuse, just as a means of explaining that I never intended to take a break, much less a long one. It's so much harder to get back to the video making process once you've lost rhythm 😆. But I'm not gone!
@@DanFox I just wanted to echo Jamie’s sentiments. I have watched tons of photography videos and seriously you have had the best tips.
I have seriously told every photographer I’ve met about using your zebras (zeb-rahs) method and video. Also, your Sony iso video is one of the most well put together deep dives I’ve ever seen.
Dan, I thoroughly enjoy your CZcams channel. In a genre (photography) that is oversaturated in my opinion, you found a way to not only differentiate yourself but also provide useful information. Thank you.
I appreciate that feedback, Mark! There are definitely times when I get a bit disheartened at the process of trying to find new ways to contribute to this genre, so it's nice to hear that despite the challenge it seems to resonate with people.
Been thinking more about your comment, Mark. Out of curiosity (if you don't mind sharing)... what is it that YOU think differentiates my content? It's one thing for me to know what I hope resonates with people, but it's harder to know what they ACTUALLY resonate with, you know? The data in my analytics only tells me so much.
Hi Dan. I’ve been shooting for years now and at the risk of sounding arrogant, I feel like I don’t have much more to learn on CZcams based on the videos being uploaded today. Videos with titles like, “focus here every time for sharp photos” I think, let me guess, hyperfocal distance? Or videos that explain over and over again to set your shutter speed to twice your frame rate when shooting video. I feel like every video is targeted towards newer photographers, which don’t get me wrong is how I learned and I understand they draw views, but I want to go into more depth. Your channel, specifically the iso video, gave that to me. I think many photographers/videographers feel the same as me, and that is why there was such a strong response (as you said in that video) to get more into the detail about how iso actually works.
Appreciate you humoring me! And I understand precisely the struggle you're sharing. And it's definitely a hard struggle to overcome when creating content. How to balance making accessible content for new people (where I focus on dispelling so much bad info typically bandied around in those videos) with content for people who are farther along (and where I have to assume that they already know the beginner stuff).
Don't let us wait for a long time dude
You know. You read on the comments all the time of people going, “I love your videos, keep up the good work”…. Dude…. I ACTUALLY love your videos. Jesus Christ man. I’ve learned more about photography in 3 videos just wanting to see a review of my new Sony A7RV I just purchased. And I’ve seen a LOT of photography videos and courses. Sheesh man. It’s basically the same as sound engineering but with your eyes. Nice. Now photography makes sense. Thanks.
I appreciate that! Glad to hear that my videos are being helpful!
Crazy to think Sequator is free !
Right?!
Hi, Dan. I just got to know and like you, but it looks like you're on a long vacation and I miss you very much. I'm sure many of your fans feel the same way. I hope you get your rhythm back and come back soon.
Whenever I use the white and black sliders, I hold down the alt key while dragging the sliders to see the clipping directly on the image. Good video!
Thanks! I like doing that, too 👍 it just didn't make the edit in this video lol. Probably should have left it in though come to think of it. Thanks for mentioning it!
Hey, I loved the “Stop Missing Focus”video. You know the part where you’re in the settings and you show your key-binds and tell us where to map the AF-On button? Can you do a video of the other 5 pages to where we can see all your other key-binds and why? I’m curious to see how you’ve mapped your bottoms vs out the box like the way I have mine setup. Tbh, I don’t even know what all the buttons do yet, I just purchased mine but would love ideas on how to set them up.
Yup! Once I get settled into my new studio (I just moved), that's the first video I plan to finish - going over my custom buttons and menus for the a7 IV - and more importantly, why I've chosen those settings.
Don't move that camera! 🤣 For a deeper dive on noise, see this video: ISO on Sony cameras is often INCREDIBLY misunderstood czcams.com/video/gisj6Og3xCI/video.html
What lenses will be the best for astro photography?
The focal length will depend on what you want to shoot within the astro sub-genre, but a few things to consider is that you need the lens to be fast, you want it to be sharp in the corners (as well as the middle obviously), and it needs to have good coma correction.
I must be missing something important, because I don't understand why you'd use exposure stacking instead of a longer exposure time? If your scene is static, and you're on a tripod, you could just use a lower shutter speed to let in more light for a single exposure.
You're limited in how long of a shutter speed you can use if you want to get sharp, pinpoint stars because the stars are moving. Depending on the resolution of your sensor, it could be 30 seconds or as little as 8 seconds (check out the NPF rule). Longer exposures will make the stars streak. Star trackers are meant to help this problem by moving your camera at the same rate and position as the stars so you can get longer exposure times, but not everyone wants to lug around a star tracker or spend a bunch of money on one. Plus, with really long exposure times, you start introducing thermal noise that usually results in having to stack images anyway. So this method allows you to get good results if you don't have a tracker.
@@DanFox Ah okay, so it sounds like taking multiple exposures and stacking them gives you less noise than taking a long exposure if you don't have much time to capture the scene (due to the stars moving). Effectively more information captured in the same amount of time.
I so want it to be See-kwayt'-or
Who knows, maybe it is! There's certainly a good argument to be made for pronouncing it that way as opposed to pronouncing it similar to "sequitur". I've never heard the developer say the name - I've only seen him write it on DPReview and on his site - he's from Taiwan, though, so maybe there's no example of him saying it publicly in English.