Jon Stern

Lives in United States Mountain View, CA, United States
Works as a Electronics Engineer
Joined on Apr 21, 2003

Comments

Total: 298, showing: 1 – 20
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In reply to:

Andrew Lazarev: With terrible 1/2.3" sensor )) GoPro when will 1/1.7" or 1" sensor?

I can see how that works for you in your interactions with your students, but context matters. If you had a student come to you and said they had studied Newton's Principia and concluded that the second law is F=ma, you would not fail them.

You are just sticking to your views. Please provide analysis that proves an action camera is not DoF and diffraction limited and I and my team of optical engineers will review it.

Please make sure you include in your analysis all manufacturing tolerances and athermalization variations to +/-3 sigma.

Link | Posted on Sep 25, 2021 at 18:08 UTC
In reply to:

Andrew Lazarev: With terrible 1/2.3" sensor )) GoPro when will 1/1.7" or 1" sensor?

Of course all lenses are diffraction limited, That's physics. If you don't just want marketing pixels, you need to have a point spread function appropriately sized for the pixel pitch.

I'm laughing at your accusations of making things up here. I assure you I have studied this deeply, including in the analysis tolerance data.

And you can get something useful out of a 1-Inch sensor, It just becomes limited and of questionable value add for the addition cost and size.

Link | Posted on Sep 25, 2021 at 05:34 UTC
In reply to:

Andrew Lazarev: With terrible 1/2.3" sensor )) GoPro when will 1/1.7" or 1" sensor?

Paul JM, I forgot to mention that 4K action cameras are also diffraction limited. Increasing the f-number will lose resolution.

Drones have be able to move to 1-inch because they do not need to focus at arm-length selfie distance.

Link | Posted on Sep 24, 2021 at 15:21 UTC
In reply to:

Andrew Lazarev: With terrible 1/2.3" sensor )) GoPro when will 1/1.7" or 1" sensor?

As I wrote earlier: An action camera should keep everything you care about in focus all the time, and they are depth of field limited. A larger sensor would either mean near focus would be pushed out, or the f-number would need to be increased to the point where the improved low light would lost. In the case of the Insta360 1-Inch they increased the f-number a little, but near focus is too far out for selfies.

Link | Posted on Sep 24, 2021 at 04:46 UTC
In reply to:

3Percent: Commenters, raise your hand if you've used it...

Had it (twice - EOS 5 and 3) and loved it. It was like mind-control AF for me.

Link | Posted on Sep 20, 2021 at 03:24 UTC

I loved the eye-controlled AF in my EOS 5, and then EOS 3. It felt like mind control focus much of the time. I know it didn't work for everyone, but sophisticated eye tracking solutions have existed for many years, including at consumer price points from companies like Tobii.

I could never understand why Canon was holding off on introducing the technology to their digital SLR line. I'm in the consumer electronics segment myself. So I know that things that seem trivial, or affordable, to those on the outside often aren't. But this was something they had in the market and had seen advances elsewhere and component cost reduction (like IR LEDs).

Link | Posted on Sep 20, 2021 at 03:22 UTC as 48th comment
In reply to:

snapa: I think... if you need an inexpensive video device, this GoPro is the best non-professional choice can buy. If I'm wrong, please point me to any other device that is better, cheaper, easier to use, *water proof*, or smaller.
If you can't, I just made my case, thank you!

@JoeTuner With the subscription GoPro will replaced damaged cameras no questions asked up to two times a year, for a $100 deducible.

Link | Posted on Sep 18, 2021 at 21:55 UTC
In reply to:

Richmondthefish: GoPro and action cams have their uses(obviously). My issue is the following with GoPro

1. Terrible reputation on reliability and bugs. Already 2 reviewers reported Hero 10 overheats after 20 mins in 4k recording.

2. Video IQ is poor considering what smart phones are offering. The colors on the GoPro are horribly statured and the software isn't advanced like an iPhone which will protect highlights in the day whereas you will see whites getting blown out on the GoPro. Not to mention the beauty filter it applies to the face which is very aggressive.

This guy specifically says he not seen any overheating in real world 5.3k shooting: https://youtu.be/_loMPVaN5eM

Link | Posted on Sep 17, 2021 at 19:58 UTC
In reply to:

Richmondthefish: GoPro and action cams have their uses(obviously). My issue is the following with GoPro

1. Terrible reputation on reliability and bugs. Already 2 reviewers reported Hero 10 overheats after 20 mins in 4k recording.

2. Video IQ is poor considering what smart phones are offering. The colors on the GoPro are horribly statured and the software isn't advanced like an iPhone which will protect highlights in the day whereas you will see whites getting blown out on the GoPro. Not to mention the beauty filter it applies to the face which is very aggressive.

1. HERO10 has better stability. The users reporting over heating are testing on a table without air flow, so it's a worst case.

2. HERO10 has a "natural" color profile.

Link | Posted on Sep 17, 2021 at 17:49 UTC
In reply to:

Photoman: Is there anything on the market, that truly competes with GoPro?

@DrCastle No. DJI made their stabilization look good by cropping 20%, to try beat the HERO7 with its 10% crop (zooming on the HERO7 would then lead to better stabilization than the Osmo). Since then HyperSmooth has improved and there's the boost option if you want to improve stabilization with some loss in FOV (but less than DJI's).

Take a look at this video and then tell me if you stand by your claims. The DJI is not even close: https://youtu.be/dDLYovkb9kk?t=1051

Link | Posted on Sep 17, 2021 at 16:52 UTC
In reply to:

fatdeeman: It will be interesting to see if the 4k120 is actually true 4k, at least to the same extent that the lower frame rate settings are.

All too often, the faster frame rate settings on smartphones and action cameras alike are nowhere near the resolution of the lower frame rate settings at the same resolution.

Hopefully it isn't just lower resolution upscaled or using awful lineskipping like the 1080/240 mode on previous cameras.

Same with the 2.7k 240fps.

The 2.7k 120fps on the 8 and 9 has no more detail than the 1080p 120fps mode.

If it truly is 240fps and is as detailed as the lower frame rate 2.7k modes it would be awesome.

But then again, even if they could make the 1080p 240fps truly 1080 and not lego it would be a good start.

@Lukedriftwood 4k120 is NOT line skipped! Why would you say that?

Link | Posted on Sep 17, 2021 at 02:27 UTC
In reply to:

Jonne Ollakka: No Mod Mod? That's a deal breaker.

Did you mean to write Max Lens Mod? Support for that arrives in Nov.

Link | Posted on Sep 17, 2021 at 02:19 UTC
In reply to:

thx1138: What is Go Pro stills IQ like compared to say Olympus Tough UW camera? I'm looking at something for doing wave breaking shots along the shore line or close by. I assume the Go Pro also uses crappy 1/2.3" sensor or so too. Does it shoot RAW?

It does shoot raw.

Link | Posted on Sep 17, 2021 at 02:13 UTC
In reply to:

Djehuty: Prefer a larger sensor though.

@Djehuty Sounds like you don't want an action camera. The RX0 isn't an action camera. The FOV and DOF are too small.

Link | Posted on Sep 16, 2021 at 18:30 UTC
In reply to:

Djehuty: Prefer a larger sensor though.

An action camera should keep everything you care about in focus all the time, and they are depth of field limited. A larger sensor would either mean near focus would be pushed out, or the f-number would need to be increased to the point where the improved low light would lost. In the case of the Insta360 1-Inch they increased the f-number a little, but near focus is too far out for selfies.

Link | Posted on Sep 16, 2021 at 17:05 UTC
In reply to:

Passereau: Improved performance ? Maybe but first NO FREEZE, NO BATTERY BUGS, CARDS BUGS, AND SO ON...

HERO10 has improved stability.

Link | Posted on Sep 16, 2021 at 17:01 UTC
In reply to:

Mariano Pacifico: "Cinematic" is the new word of 2021
"Bokeh" was so 10-months ago

Nooo. Cinematic was the word of 2020. Check out all the Youtube "Cinematic" videos.

Link | Posted on Sep 15, 2021 at 05:49 UTC
In reply to:

BrexitDefCom3: I shall go on waiting until the iPhone's cameras have 24MP sensors. The claims are ridiculous because at a 16:9 ratio video is 8MP. Its all great for grabbing 8K jpeg stills, and possibly OK 4K video, but I still baulk at the paucity of available image quality relative to my own not-Apple phones.

When Samsung have better IQ from their sensors (well, just about every competitor Apple) to compete you need a useful extra: call it a Lanyard Slot for a wriststrap: easily done on that Heavy Metal frame.

They advertize 100% tin soldered circuitry.... google NASA Tin Whiskers for the facts.

@MikeRan I did mean SAC305. I mistyped.

Link | Posted on Sep 15, 2021 at 00:53 UTC
In reply to:

BrexitDefCom3: I shall go on waiting until the iPhone's cameras have 24MP sensors. The claims are ridiculous because at a 16:9 ratio video is 8MP. Its all great for grabbing 8K jpeg stills, and possibly OK 4K video, but I still baulk at the paucity of available image quality relative to my own not-Apple phones.

When Samsung have better IQ from their sensors (well, just about every competitor Apple) to compete you need a useful extra: call it a Lanyard Slot for a wriststrap: easily done on that Heavy Metal frame.

They advertize 100% tin soldered circuitry.... google NASA Tin Whiskers for the facts.

No, they said the tin was recycled. The standard lead-free solder used today is SAC205, a tin/silver/copper alloy. They didn't say they are using pure tin, and would not do so.

Link | Posted on Sep 14, 2021 at 19:28 UTC
On photo Egyptian Goddess in the At the museum challenge (8 comments in total)

Nice photo, but this is a pharaoh, not a deity. They are holding the pharaonic symbols of power: the crook and the flail. The shepherd's crook symbolizes kingly rule; the flail symbolizes the fertility of the land (which the pharaoh was supposed to guarantee).

They are also wearing the pharaoh's war crown.

I think this is actually Tutankhamun himself. His face was quite feminine and scans show that he had wide hips and gynecomastia (male breasts), a condition caused by low testosterone and high estrogen.

Link | Posted on Sep 12, 2021 at 17:43 UTC as 2nd comment | 1 reply
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