Remote viewfinder with unofficial samsung lens ?

[PhilZMZ]

Otto, I have another request. Using your 5.49 mod, when “no lens release” is checked, the camera can take a picture even if there is no lens or lens is not detected. Otherwise, it is not possible. With Samsung camera manager, I can remote the viewfinder and take photos with the smartphone. But If I remove the lens, or use an unofficial samsung lens (for instance a Canon lens with an adapter) or even a lens with nx mount but without electronic connection (for instance Sigma 8mm) Remote viewfinder doesn’t lauch and the smarphone displays somthing like “No lens. Unable to start remoteviewfinder.” And if I remove the lens once remote viewfinder has started, remote viewfinder closes. Do you think this could be hacked, I mean Remoteviewfinder could word without official lens ? Best regards, Phil

[ottokiksmaler]

I have had no success in that yet. I'm interested in it personally, but it seems I'll have to make a new smart camera app for that (as it stands right now).

[ottokiksmaler]

Looks like someone already did it :) Look at this https://github.com/mewlips/nx-remote-controller-mod

[ottokiksmaler]

Or better here https://mewlips.github.io/nx-remote-controller-mod/

[PhilZMZ]

Wow this mod https://mewlips.github.io/nx-remote-controller-mod/ is fantastic ! Works fine, even without an "official" lens, thanks Otto for the info.

But does it work only with patch 5.3 ? Not with 2.49 ? Is there any way to make both mods (5.3 and 2.49) working together on the same camera ?

[ottokiksmaler]

I don't see anything in the code that depends on Vasile mod, this could easily be adapted to NXKS.

[mewlips]

@ottokiksmaler Right! Technically, it is not dependent on the specific mod. (nx-patch or nx-ks). I have a nx1 and nx500. Both are nx-wake-on patched. What is needed is an installation script for nx-ks mod.

@PhilZMZ Please add the issue to my github. https://github.com/mewlips/nx-remote-controller-mod/issues

I will start working on it.

[ottokiksmaler]

I have just asked the maintainer of NXKS to see if this could be included in that mod pack.

[ottokiksmaler]

Great work @mewlips :)

[ajavamind]

Great work everyone! I use two NX500 cameras that are twined for 3D photography. I want to be able to trigger both cameras simultaneously over WiFi using a single android app. Now that a web browser may be used as a remote viewfinder etc. it seems this is feasible. I'm an android developer, so I interested to know what code I may use as a base starting point for writing this app? It is important that the camera mods allow the NX500 to respond nearly instantaneously to the shutter release request. Thanks for your help.

Andy

On Sat, Sep 24, 2016 at 10:15 AM, mewlips notifications@github.com wrote:

@ottokiksmaler https://github.com/ottokiksmaler Right! Technically, it is not dependent on the specific mod. (nx-patch or nx-ks). I have a nx1 and nx500. Both are nx-wake-on patched. What is needed is an installation script for nx-ks mod.

@PhilZMZ https://github.com/PhilZMZ Please add the issue to my github. https://github.com/mewlips/nx-remote-controller-mod/issues

I will start working on it.

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[ottokiksmaler]

Could you define more precisely "nearly instantaneously"?

[PhilZMZ]

@ajavamind : I think trying to remote 2 or more NX500 via Wifi will never be as good as using a wired connection. I remote 6 NX500 with a wired connection, and if I take a photo of a stopwatch, all the photos are taken in the same 1/100s (I dont have a stopwatch displaying 1/1000s...) You can buy a connecting cord (or 2 for stereo, or more...) here on ebay : http://www.ebay.fr/itm/JJC-Remote-Control-Connecting-Cord-for-SAMSUNG-NX1-NX1000-NX20-NX210-NX300-NX500-/311592892514?hash=item488c623862:g:SvgAAOSwkx5XEGRG

[mewlips]

@ajavamind

Here is a shell script example for 'nearly instantaneously to the shutter release request.' if in manual focus mode.

function take_picture() {
    ip=$1
    curl http://$ip/api/v1/input/inject?keydown=Super_L
    curl http://$ip/api/v1/input/inject?keydown=Super_R
    curl http://$ip/api/v1/input/inject?keyup=Super_R
    curl http://$ip/api/v1/input/inject?keyup=Super_L
}

take_picture 192.168.0.252 &
take_picture 192.168.0.112 &

I have tested this script with my nx1 (192.168.0.112) and nx500 (192.168.0.252).

Mod's daemon is already able to discover each others. (by broadcasting UDP packet)

$ curl http://192.168.0.112/api/v1/camera/status
{"battery_charging":false,"battery_percent":-1,
"battery_level":4,"drive":"UNKNOWN","mode":"M","hevc":"off",
"cameras":[{"ip":"192.168.0.252","packet":"NX_REMOTE|0.8|NX500|1.12|"},
{"ip":"192.168.0.112","packet":"NX_REMOTE|0.8|NX1|1.41|"}]}

Below source code is an android example for receiving discovery packets from cameras. https://github.com/mewlips/nx-remote-controller-mod/blob/master/NXRemoteController/app/src/main/java/com/mewlips/nxremote/DiscoveryPacketReceiver.java

[ottokiksmaler]

If you need as little delay as possible, and you already have fixed exposure and focus, the fastest way is calling st cap capt single start But like in stapp.c (by sending message directly)

[ajavamind]

Nearly instantaneously for me is 1 ms. when focus is already set. The second camera that triggers the flash (second curtain) will signal the studio strobe to flash. So I want to insure both cameras see the flash and capture the scene fully. With a wired connection I do not always get a consistent flash. My guess is the shutter trigger switch bounces so each camera shutter starts at a different instant.

Andy

On Sat, Sep 24, 2016 at 10:54 AM, ottokiksmaler notifications@github.com wrote:

Could you define more precisely "nearly instantaneously"?

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[ajavamind]

Thanks for your input

Andy

On Sat, Sep 24, 2016 at 12:08 PM, ottokiksmaler notifications@github.com wrote:

If you need as little delay as possible, and you already have fixed exposure and focus, the fastest way is calling st cap capt single start But like in stapp.c (by sending message directly)

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[PhilZMZ]

@mewlips "Please add the issue to my github. https://github.com/mewlips/nx-remote-controller-mod/issues. I will start working on it." Which issue are you talking about ? I have another idea, I post :-)

[ajavamind]

I suspect you are right about using a wired connection.

Andy

On Sat, Sep 24, 2016 at 11:16 AM, PhilZMZ notifications@github.com wrote:

@ajavamind https://github.com/ajavamind : I think trying to remote 2 or more NX500 via Wifi will never be as good as using a wired connection. I remote 6 NX500 with a wired connection, and if I take a photo of a stopwatch, all the photos are taken in the same 1/100s (I dont have a stopwatch displaying 1/1000s...) You can buy a connecting cord (or 2 for stereo, or more...) here on ebay : http://www.ebay.fr/itm/JJC- Remote-Control-Connecting-Cord-for-SAMSUNG-NX1-NX1000- NX20-NX210-NX300-NX500-/311592892514?hash=item488c623862:g: SvgAAOSwkx5XEGRG

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[ajavamind]

thanks for your suggestion.

Andy

On Sat, Sep 24, 2016 at 11:33 AM, mewlips notifications@github.com wrote:

@ajavamind https://github.com/ajavamind

Here is a shell script example for 'nearly instantaneously to the shutter release request.' if in manual focus mode.

function take_picture() { ip=$1 curl http://$ip/api/v1/input/inject?keydown=Super_L curl http://$ip/api/v1/input/inject?keydown=Super_R curl http://$ip/api/v1/input/inject?keyup=Super_R curl http://$ip/api/v1/input/inject?keyup=Super_L }

take_picture 192.168.0.252 & take_picture 192.168.0.112 &

I have tested this script with my nx1 (192.168.0.112) and nx500 (192.168.0.252).

Mod's daemon is already able to discover each others. (by broadcasting UDP packet)

$ curl http://192.168.0.112/api/v1/camera/status {"battery_charging":false,"battery_percent":-1, "battery_level":4,"drive":"UNKNOWN","mode":"M","hevc":"off", "cameras":[{"ip":"192.168.0.252","packet":"NX_REMOTE|0.8|NX500|1.12|"}, {"ip":"192.168.0.112","packet":"NX_REMOTE|0.8|NX1|1.41|"}]}

Below source code is an android example for receiving discovery packets from cameras. https://github.com/mewlips/nx-remote-controller-mod/blob/ master/NXRemoteController/app/src/main/java/com/mewlips/nxremote/ DiscoveryPacketReceiver.java

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[ottokiksmaler]

Why second curtain for triggering optical slave? With low enough ambient light and slow enough shutter and first curtain flash, you should have no issues. Regarding 1ms - I would have to test but I doubt that would be possible with these cameras.

[KinoSeed]

@mewlips I added the issue. Glad to hear it's mod-independent.

re: synchronization of cameras' capture - would it be possible to execute a capture at a given time (if cameras' time is synced it may just do the trick)

[ajavamind]

I think my initial thought to use the flash 2nd (rear) curtain is incorrect.

My goal for a 3D camera rig goal is to shoot at 1/125, F11, and ISO 100, so the camera's shutter is open 8ms. The NX500 flash sync speed is 1/160 or 6.25 ms. The studio flash strobe(s) is/are remotely triggered by a PocketWizard remote. Depending on the type and power of the strobe output, the flash duration will be from perhaps half ms to maybe 4 ms long. Now whatever camera opens the shutter first, the strobe is not yet triggered, instead wait for the other camera to signal the strobe flash. We can't count on which camera will release its shutter first, given shutter switch bounce and unpredictable delays in the camera software operation, but at least we know focus is set, so that delay is ruled out.

Assuming a flash duration of 4ms, if I choose to use 1st curtain flash for both cameras, the other camera's shutter has to open within 4ms of the first camera, worse case. And with short duration flash units and less power, the camera sync delay can be more than 4 ms.

If I choose the 2nd curtain for both cameras, I need less shutter sync delay time than 4ms and are more likely to miss the full flash duration. So I should use first curtain flash setting.

Andy

On Sat, Sep 24, 2016 at 4:01 PM, ottokiksmaler notifications@github.com wrote:

Why second curtain for triggering optical slave? With low enough ambient light and slow enough shutter and first curtain flash, you should have no issues. Regarding 1ms - I would have to test but I doubt that would be possible with these cameras.

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[ottokiksmaler]

If you can control the ambient light to low level (or use a ND filter and increase strobe power) you could have ss at 1/10s or similar and have no issues at all.

[KinoSeed]

Andy, keep in mind with high shutter speeds, this happens: https://youtu.be/CmjeCchGRQo?t=145

[PhilZMZ]

@KinoSeed Do you think there could be a noticeable difference (moire, sharpness, aliasing...) if using "silent shutter" instead of "normal shutter" for a aerial photo taken at 1/1200s or 1/2000s with a camera under a drone not moving too fast (less than 1m/s)?

[ajavamind]

@kinoseed thanks for the video link, it much improved my understanding of shutter speed issues!

Andy

On Mon, Sep 26, 2016 at 4:33 AM, KinoSeed notifications@github.com wrote:

Andy, keep in mind with high shutter speeds, this happens: https://youtu.be/CmjeCchGRQo?t=145

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[KinoSeed]

@PhilZMZ "moire, sharpness, aliasing..." shouldn't be affected at all, as they have to deal with sampling/interpolation/sharpening, which do not depend on the shutter.

[PhilZMZ]

@KinoSeed Thanks for the info !