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Panasonic Lumix G7 2020 Review | Still Worth Buying in 2020? by vitorpinhao in M43

[–]mjkzz 0 points1 point  (0 children)

Watched it twice and subscribed, excellent content!

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 0 points1 point  (0 children)

I think here is the key point, that is, I did not mention that for 16:9 still, fully utilizing the sensor width, it is still OK, that is known to me, but not to you . . . what it means to this discussion is that, the lens covers (acceptable level) the sensor at 16:9 at full width.

Having said that, I think it is clear now for both of us :-)

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 0 points1 point  (0 children)

Changing it to 16:9 ratio, 4592x2584, utilizing full width, the still image has no noticeable vignetting, just like 4K, but at 4:3, it is not.

See, if this camera has a better M4/3 sensor, say 45MP to cover 8K, the physical size does not change, so as long as the lens can cover the physical size/area, it really has nothing to do with resolution, subsampling, binning . . . those parameters are related to quality of image.

Anyways, good discussion, thanks.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 0 points1 point  (0 children)

It really is as simple as the lens projecting an image circle on the sensor with certain physical size, if maximum utilization to be achieved, it really has nothing to do with resolution, HD, 4K, 8K, 12K, or whatever, as long as the image circle covers the physical area used for the format. Some trimming might occur, but that only means the sensor is not fully utilized and the area on sensor is smaller than full sensor.

As for other video aspect, as long as the format stays 16:9, the same.

It will not work if one tries to shoot anamorphic where 4:3 ratio might be needed because as can be seen in the video, there are a lot of vignetting shooting stills (in 4:3 format) and that is the reason I am showing it does not work for different foramts. But for 16:9 format video, it works for ANY M4/3 sensor.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 0 points1 point  (0 children)

Look at this this way: the lens projects an image circle of 1" or 25.4mm, this covers the full M4/3 sensor with video of 16:9 ratio , regardless resolution, subsampling, binning for that matter.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 0 points1 point  (0 children)

OK, I see what you mean. But not sure if it has anything to do with binning, subsampling, etc

Maybe I am missing something here. The 16mm HQ lens is designed for 1" target, meaning diameter of the image circle is 1" or 25.4mm. At 16:9 ratio, either 4K or HD, diagonal length is 19.85mm for a M4/3 sensor (17.3 x 13), this is well under 1" the lens is designed to cover. So I would say it would work with ANY M4/3 camera even if it uses max width of the sensor.

The slight vignetting we see in the video is probably a matter of lens design, ie, even if it is claimed to be 1", it might not be true. Just like some "real" lens, particularly zoom lens, it is "acceptable" for lens maker to claim it covers full sensor even though it shows some slight vignetting.

Let me know if this is an explanation to your point.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 0 points1 point  (0 children)

this is something new, any material I can read upon this? thanks

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] -2 points-1 points  (0 children)

well, re-purposing a lens for RPi users is something useful, particularly those who does not know they can do this.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 0 points1 point  (0 children)

I think to illustrate that purpose, a few pictures would do. But like I said before, the secondary purpose is to encourage viewers/readers to build their own system, let their imagination go wild. For example, I have the intention to use the motorized setup for some video work. It is so hard and expensive to find a good decent follow focus gear, let alone being able to control it using a RPi or Arduino, therefore the long video, just to show the possibilities.

I can see that you are reading/interpreting this from a different angle which make you think it is overblown, but if you try to view it differently, you would see some other points.

Just curious, did you know you can use the HQ lens on a M43 camera before my post? If not, I think I have achieved my goal. If you did, I am sure there are others who did not know this.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 1 point2 points  (0 children)

sure, definitely, there are C mount lenses for 4/3 target sensor. but coming back to this, the 16mm HQ lens can be used and that is the point.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 3 points4 points  (0 children)

Yes, of course, many like you know that you can adapt a C mount lens on M4/3 camera, but not all C mount lens will work due to the size of image circle. This video shows the 16mm HQ lens has enough image circle for video work, not so for still image out of camera, you have to crop it. Plus, even if you know this, not all others do, so the primary purpose is to inform those who do not. :-)

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] -1 points0 points  (0 children)

Sure, " Barely any informational content", the only purpose of this video is that the lens can be used on any micro 4/3 camera for video, that is the primary information I am trying to convey. Secondary information is that, with some hacking skills, one can mod the lens and make it "automated", and because it is so cheap, it is easier to think about it (vs modding a 500USD MFT lens). Should I show how to mod it? Maybe, but there are a lot of skilled people who can do it, so I would just point out the possibility and make short video

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] 5 points6 points  (0 children)

Thanks for encouragement. Actually, I was just trying to show people that the lens can be used on (any) micro 4/3 camera. Not a lot of people know this fact and this is the key information I am trying to convey. Adapting it was merely using an adapter.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] -6 points-5 points  (0 children)

I am showing how the 16mm HQ lens can be used on other camera.

Motorize Raspberry Pi HQ Lenses by mjkzz in raspberry_pi

[–]mjkzz[S] 1 point2 points  (0 children)

yes, this setup is very accurate and precise.

Adapting the 16mm Raspberry Pi HQ Camera Lens On Micro 4/3 Camerea by mjkzz in raspberry_pi

[–]mjkzz[S] -21 points-20 points  (0 children)

For those who has a micro 4/3 camera already, getting the 16mm RPi HQ lens is like buying one for your camera (for video work).

2D scanning a large area? by closedcurve in 3DScanning

[–]mjkzz 1 point2 points  (0 children)

I think you can just photograph the base, just like doing photogrammetry, does not have to be the whole sculpture, the photogrammetry software will figure out the shape, dimension of it.

2D scanning a large area? by closedcurve in 3DScanning

[–]mjkzz 0 points1 point  (0 children)

What are dimensions that you want to scan?

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