Pentax K-3 III Astrotracer type 3 – new built-in star tracking works surprisingly well! │ ガジェット-youtube動画リンクまとめ

【視聴数　3191】

【チャンネル名　snappiness】

【タグ　pentax astrophotography,pentax astrotracer,pentax k-3iii,star tracker astrophotography,night photography,pentax k3 iii,pentax k3 mark iii】

コメント（29件）

Elias Arce より:

3月 29, 2022 7:45 pm

Can’t get enough of your content man, keep up the good work!

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snappiness より:

3月 29, 2022 7:57 pm

Still trying to work out my new mic setup, so sorry about those wearing headphones right now 😬but hey, how ‘bout that astrotracer?

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Lighthunter - photo journey より:

3月 29, 2022 7:58 pm

Okay, you make me want to get the K-3III much more (maybe xmas? 😀 )

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awichiwou より:

3月 29, 2022 8:00 pm

Thanks for the video, great information 👌🏻

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Casus Belli Preparedness より:

3月 29, 2022 8:45 pm

I did something horrible today.
There was this K3iii with a nice lens on ebay for around 2200€ and I was interested. The I ended up buying this shitty camera instead 🙁 The Canon EOS R6 with a 50mm.
I fell ashamed and somehow know that I will never own this beautiful Pentax 🙁 I need help, I have a severe case of GAS

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G G より:

3月 29, 2022 8:56 pm

Good video! Very promising feature that expands on the K3iii capabilities. You said you wanted to stack in camera – Have you used the built-in additive or average modes?

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Asbel より:

3月 29, 2022 9:09 pm

From your review one could sense AT3 is half baked at the moment, and might continue to improve and add features in the next updates, nevertheless it is an awesome idea/feature. Since it is a script they could even implement it on the gps bodies like the K-1 and come up with some hybrid astrotracing system with improved times. Great video as always, cheers!

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Asbel より:

3月 29, 2022 9:14 pm

Off topic: As a designer, I couldn’t help noticing your addiction with the blue color, wall, sunglasses, lens barrel thingy in the back, even your wedding ring. What’s up with that? lol

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Eckart Hofmann より:

3月 29, 2022 9:26 pm

That Astrotracer feature in/with Pentax cameras is unique, no matter whether it’s with the external O-GPS1 or the bultin GPS unit or Astrotracer type 3 in the K-3III.
It’s definitely much better than no tracking at all, but that’s it. For the sake of assuring that there’s nothing wrong with the Pentax implementation of that feature: No other camera manufacturer could do that better (they didn’t even try it, afaik), because there are hard limitations for that type of star tracking.
First: the maximum exposure time is very limited by the focal length and the altitude of the sky area we want to photograph above the horizon. Due to the tracking with sensor movement and resetting it after each image, the relevant image area shrinks when we want to stack that images later – so a slightly shorter focal length comes in handy to give enough space (when is “bad pun day”? 😉) around the objects we want to photograph. To make things worse, the sensor movement prevents the use flat frames because eg. dust shadows on the back of the lens throws a “motion blurred” shadow on the sensor. Finally the fixed camera position leads to image rotation between the light frames, which leads – in particular in light polluted areas – to a doughnut shaped gradient in the stacked image. That gradient is very complicated or nearly impossible to remove completely. That’s why “real” mounts for astrophotography exists: they don’t have or cause the mentioned issues. But we have to pay for that: weight, size, complexity and money.

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Darren Pullman より:

3月 29, 2022 9:54 pm

What if you are using Astrotracer on a GoTo mount? Does the dual movements conflict and mess up the images?

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Thomas Hedlund より:

3月 29, 2022 10:39 pm

By using interval shooting together, it is possible to perform the main exposure multiple times for each test shooting

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THIS SIDE TOWARD SCREEN より:

3月 29, 2022 11:36 pm

Excellent overview! Amazing images!

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4035mw より:

3月 30, 2022 12:22 am

Thank you so much for the video! I can’t wait to try the new Astrotracer on my Pentax K3iii. (I have pixel 6 pro too, lol!)
To be honest, it’s a lot easier to use my full spectrum converted pentax KP for Astrophotography w/Pentax GPS attachment, but your video makes it sound so easy. 😊🙏

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John2Wheels より:

3月 30, 2022 1:17 am

Nice man! In some ways seems better than the gps version. Was always a pain getting my K1 set up to work properly before. You’re making me wanna scout eBay for the gps module for my K70, haha.

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leehaze1 より:

3月 30, 2022 1:32 am

Nice! I have only tried the gps astrotracer feature before on another camera. Going camping soon with little to no light pollution. This should be fun to try. thanks as always.

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Kobie M-C より:

3月 30, 2022 6:16 am

I keep staring at my 600 BEGGING for clouds to dissipate or the weather to not be freezing lol. Soon I’ll get out these and try it out. Great video and intro to the new Astrotracer!

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Lee Iveson より:

3月 30, 2022 7:27 am

Awesome results especially for your first time using it! I really need to try some Astro with the K3ii. Great info James.

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Doki Mus より:

3月 30, 2022 9:04 am

Just for your information, ISO1600 is probably the sweet spot for your camera nonetheless. You really don’t have to care too much about ISO in AP, and it’s quite counterintuitive sometimes with high ISOs being the “better” choice. Has to do with read noise etc, if you’re interested. So I’d just stick to 1600 and in your case of Orion, change exposure by time, so maybe stack some 20s and 40/60s to get proper detail in the core and outer regions. Stacking takes care of burned out sections if you’ve got them properly exposed in other images.

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JBP より:

3月 30, 2022 1:18 pm

Very informative video. I too was skeptical and thought it might be a bit gimmicky and more of a marketing ploy due to them removing the GPS unit to make room for the larger pentaprism. So I’m glad to hear it works so well, and is surprisingly simple and convenient. All your suggested improvements sound great and feasible.

I was not aware that it would not work with objects in the foreground. I don’t know how the software is working under the hood, but it seems like it would be possible for the camera to go “ah, these objects here are small, numerous, and move in one direction, I’ll use those for the tracing algorithm.” I’m not sure how much spare processing power the camera has for that, and I suppose that would likely mean an even longer processing time between shots. It would be interesting if the user could select an area for the camera to use for the computation in live view with the touchscreen before beginning, and maybe using a smaller area would reduce computation time, although it would reduce accuracy as well.

In any case, it’s a super neat feature and I really enjoyed the video! Way to go Pentax for doing a lot with a little as always. 🙂

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Marc Synwoldt より:

3月 30, 2022 6:44 pm

Now, this was not only highly instructive, but it also makes me want a K-3 III even more (as if I didn’t want it before). What a cool feature! 🤩

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