Date   

Re: New base extended 3D lens with single shutter use

Laurent DOLDI (Toulouse, France)
 

On Thu, Apr 22, 2021 at 11:23 PM, Depthcam wrote:
internal reflections and glare that can occur on one of the mirrors and that causes an artifact on one of the images
The 9005 is also equipped with a pair of 58mm filter threads in the front, which can be used for attaching converters, filters and hoods
http://www.loreo.com/pages/products/loreo_3dlenscap9005.html

I have the Pentax version but not used it for the moment.


Re: New base extended 3D lens with single shutter use

Laurent DOLDI (Toulouse, France)
 

Excellent work, but why not (like me) just purchasing a LOREO 3D Lens in a Cap 9005 (US$150)?
http://www.loreo.com/pages/products/loreo_3dlenscap9005.html

The 3D Lens in a Cap 9005 has a focus coupled Parallax Compensation system. When the lens is focused on a subject at a given distance, the image pitch is automatically adjusted within the unit itself to suit the object distance. This works from 1.5m to infinity. The adjustment of the relative positions of the image pair can be viewed in the viewfinder, or with Live View in modern digital SLR cameras. Once a user learns how to use the lens, focusing can actually be done by parallax compensation alone. When the subject appears in the same relative position in both the left and right image in the viewfinder, it will automatically be in focus.


Re: 3D Pop-Up, 3D Pop-In, 3D Pop-Out, 3D Pop-Down, Etc

Etienne Monneret (Perso)
 

Le 23/04/2021 à 14:45, JackDesBwa|3D a écrit :
I did not follow all your trials, but I wonder if you noticed that the phantogram thing is not only a matter of camera angle. There is also a processing step on the image to cancel the perspective out, which helps to create the actual effect.
There are certainly people experienced with this technique here who could talk about it better than I would, though.
 

The illustration here is clear:

https://en.wikipedia.org/wiki/Phantogram

The final anaglyph must not be the shot object (when cameras were in place of your eyes), but its perspective-distorted projection. A phantogram is an anamorphic stereo picture:

Old processing instruction examples:

http://abtutor.free.fr/Phanto/index.html

http://abtutor.free.fr/Phanto2/index.html

;-)



Fat Boy Slim 2dto3D HSBS MiDaS vs. Masuji's Mannequin Challenge Depthmapping on Tridef Player

Philip Heggie
 

Fat Boy Slim 2dto3D HSBS MiDaS vs. Masuji's Mannequin Challenge Depthmapping on Tridef Player

I prefer the look from Masuji's Mannequin Challenge Depthmapping

 

https://drive.google.com/file/d/1LwDvfvIF6hZ_Rh0ZUd9MSJ858qspPx8g/view?usp=sharing

 

 

Sent from Mail for Windows 10

 


Re: 3D Pop-Up, 3D Pop-In, 3D Pop-Out, 3D Pop-Down, Etc

JackDesBwa|3D
 

I did not follow all your trials, but I wonder if you noticed that the phantogram thing is not only a matter of camera angle. There is also a processing step on the image to cancel the perspective out, which helps to create the actual effect.
There are certainly people experienced with this technique here who could talk about it better than I would, though.

JackDesBwa


3D Pop-Up, 3D Pop-In, 3D Pop-Out, 3D Pop-Down, Etc

 

Re: https://youtu.be/V7xItF9cSUk (in 3D)

Good morning, kids. I have a thought... if a 3D pop-up works, then so should a 3D pop-in, a 3D pop-out, a 3D pop-down, etc.
 
Fasten your seat belts... this might be a wild ride.
 
 


Re: New base extended 3D lens with single shutter use

timo@guildwood.net
 

With this layout, you can view the image in stereo, on the camera’s rear viewscreen. It will be crossview.

Timo


On Apr 23, 2021, at 12:23 AM, Depthcam via groups.io <depthcam@...> wrote:

Great results.  But the thing that one must always watch out for with such mirror converters is internal reflections and glare that can occur on one of the mirrors and that causes an artifact on one of the images as can be seen on the right view of the dog sample - right next to its back paw.

It's very difficult to pick up such glare while taking the picture because we need to view the stereo pair in 3D to easily spot it.

Francois


Re: New base extended 3D lens with single shutter use

gl
 


haven't followed this closely, but looking at the picture of the double-optics lens, one appears to be vertically offset a little?
--
gl

On 22/04/2021 22:05, Oktay via groups.io wrote:
Yesterday I have finally completed my new 3D lens that utilizes four mirrors to extend the narrow base of two lenses.

This lens as I had mentioned in my post of April 3rd. uses two Lumix 12.5mm FL lenses; re-assembled at 12.5 mm separation on a Fujifilm X-E2 camera.

With  four mirrors, the base is extended to 78 mm.
9mm width of the APS-c sensor is used for each pair, so its 35 mm equivalent focal length is 50mm. (36:9 X 12.5 = 50)

Probably it is the only single body, single shutter digital 3D system that takes 3D pictures at normal range as well as at various close-up ranges.

To take close-ups I remove the extender and use the lenses with their original base.
Because the lens assembly is attached to a threaded ring; at each half rotation of the lens assembly the lenses move slightly forward, which makes it possible to focus on a closer object and thus shoot at different close-up ranges.

Today I shot the first test pictures.
I was very pleased with the ease of use of the system.

The single shutter system eliminates any synch. issues and the no delay, no shutter lag functioning gives the feeling of using film cameras.
You can react instantly and continuously unlike twin camera rigs.

Images made in the 16MP camera will yield a resolution of about 3500px X 1560px of normal range stereo images, whereas close -up stereo images will have a resolution of about 4000px X 2000px.

I have attached four pictures shot with the 78 mm extended base and four pictures of the same object taken with the naked lenses at different close-up settings.

Oktay

Attachments:



Re: New base extended 3D lens with single shutter use

Depthcam
 

Great results.  But the thing that one must always watch out for with such mirror converters is internal reflections and glare that can occur on one of the mirrors and that causes an artifact on one of the images as can be seen on the right view of the dog sample - right next to its back paw.

It's very difficult to pick up such glare while taking the picture because we need to view the stereo pair in 3D to easily spot it.

Francois


Re: Lume Pad Lightfield 3d tablet

Nima
 

Hey Ian,

You're correct. The Lume Pad is the second generation Leia Diffractive Lightfield Backlight display. Very similar to Hydrogen, but of course much larger, slightly higher resolution (2560x1600 as opposed to 2560x1440) and crucially, MUCH brighter.

The reason it doesn't mention RED Hydrogen One is because that's a RED product, they just licensed the display and some of the 3D software from Leia.

Lume Pad is the first end-to-end Leia device. Created, managed, and supported by Leia.

Let me know if I can answer any other questions.

Nima


Re: New base extended 3D lens with single shutter use

timo@guildwood.net
 

Well done Oktay.

I can see other advantages too. For example, you can use built in ttl flash,and you can change to a 2D lens at will.

Now I want to make one.

Timo


On Apr 22, 2021, at 5:05 PM, Oktay via groups.io <akdens2@...> wrote:

Yesterday I have finally completed my new 3D lens that utilizes four mirrors to extend the narrow base of two lenses.

This lens as I had mentioned in my post of April 3rd. uses two Lumix 12.5mm FL lenses; re-assembled at 12.5 mm separation on a Fujifilm X-E2 camera.

With  four mirrors, the base is extended to 78 mm.
9mm width of the APS-c sensor is used for each pair, so its 35 mm equivalent focal length is 50mm. (36:9 X 12.5 = 50)

Probably it is the only single body, single shutter digital 3D system that takes 3D pictures at normal range as well as at various close-up ranges.

To take close-ups I remove the extender and use the lenses with their original base.
Because the lens assembly is attached to a threaded ring; at each half rotation of the lens assembly the lenses move slightly forward, which makes it possible to focus on a closer object and thus shoot at different close-up ranges.

Today I shot the first test pictures.
I was very pleased with the ease of use of the system.

The single shutter system eliminates any synch. issues and the no delay, no shutter lag functioning gives the feeling of using film cameras.
You can react instantly and continuously unlike twin camera rigs.

Images made in the 16MP camera will yield a resolution of about 3500px X 1560px of normal range stereo images, whereas close -up stereo images will have a resolution of about 4000px X 2000px.

I have attached four pictures shot with the 78 mm extended base and four pictures of the same object taken with the naked lenses at different close-up settings.

Oktay

Attachments:



New base extended 3D lens with single shutter use

Oktay
 

Yesterday I have finally completed my new 3D lens that utilizes four mirrors to extend the narrow base of two lenses.

This lens as I had mentioned in my post of April 3rd. uses two Lumix 12.5mm FL lenses; re-assembled at 12.5 mm separation on a Fujifilm X-E2 camera.

With  four mirrors, the base is extended to 78 mm.
9mm width of the APS-c sensor is used for each pair, so its 35 mm equivalent focal length is 50mm. (36:9 X 12.5 = 50)

Probably it is the only single body, single shutter digital 3D system that takes 3D pictures at normal range as well as at various close-up ranges.

To take close-ups I remove the extender and use the lenses with their original base.
Because the lens assembly is attached to a threaded ring; at each half rotation of the lens assembly the lenses move slightly forward, which makes it possible to focus on a closer object and thus shoot at different close-up ranges.

Today I shot the first test pictures.
I was very pleased with the ease of use of the system.

The single shutter system eliminates any synch. issues and the no delay, no shutter lag functioning gives the feeling of using film cameras.
You can react instantly and continuously unlike twin camera rigs.

Images made in the 16MP camera will yield a resolution of about 3500px X 1560px of normal range stereo images, whereas close -up stereo images will have a resolution of about 4000px X 2000px.

I have attached four pictures shot with the 78 mm extended base and four pictures of the same object taken with the naked lenses at different close-up settings.

Oktay


Animated Medieval Fantasy Book For 3D Pop-Up

 

Here's an animated 3D Medieval Fantasy Book: 
 
Let's watch it as a 3D pop-up gag by laying it flat on the ground, a table, or floating in the air, then viewing it at a -45 degree angle.


Vertical cameras

George Themelis
 

Here is an example of cameras in vertical (top-to-top) orientation.

 

The top cameras are the Sony RX100 (the A6000 looks very similar). I use a pair of vertical posts. Both cameras and posts are on clamps. This makes it easy to switch the camera from vertical to horizontal. You can also adjust the spacing of the cameras from touching (60mm with the RX1000) to a maximum separation.

 

The bottom cameras are the Sony RX10. In this setup I keep a fixed spacing of the camera so I can view through the viewfinders in stereo.

 

George

_._,_._,_

 


Re: My Sony RX100 setup (could be similar for A6000 or other Sony cameras)

George Themelis
 

Here is a picture of my twin camera bar with the pair of mini panoramic clamps.

 

It can support any pair of cameras, not just the RX100. The rotation feature allows quick alignment and converting from staggering to side by side quickly.

 

George

 

From: George Themelis via groups.io
Sent: Wednesday, April 21, 2021 2:22 PM
To: main@photo-3d.groups.io
Subject: Re: [Photo-3d] My Sony RX100 setup (could be similar for A6000 or other Sony cameras)

 

“Is there a screw for camera rotation and another one for camera sliding?”

 

Yes, the way I have oriented them, the (smaller) screw in the front is for rotation and the (larger) screw in the back is for sliding.

_._,_._,_

 


Re: SONY RX100 synch measurements

Bill Costa as just a member
 

the Sonys ... have nice features missing from the NX1000, for example image stabilization, viewfinder, etc.  The only thing I wish the Sonys had would be closer spacing when twinning.


I have played with the Sony RX100 N3 that just arrived today, and it is indeed a very nice little camera.  As for the viewfinder, I normally do not wear glasses except for close-up work, but unfortunately even with the focus on the viewfinder pulled all the way out, I couldn't get a sharp image without reading glasses.  In contrast I can use my fixed focus CINERA viewer without glasses, so this was a surprise.  The 24mm wide angle is nice, but I've become addicted to my NX 12-24 zoom (which is a 35mm format 18.5 to 37 mm equivalent).  This focal length is perfect for the kind of shooting I usually do.  The thing I like best about the NX1000 rig is the figure 8 mount around the lenses.  It makes for a solid and easy to handle rig.  It turns out it should be possible to do something similar for the RX100 using  a cage.

cage-dual.jpg
The cages I tried would be very close to being perfectly level using just a mechanical connection, but the extra material would add another 1/2 inch (14.5 mm) to the lens separation.  I think I could have a machinist remove the adjacent sides and make a top and bottom plate to tie the cages together.  But as George pointed out, that's still a pretty wide-eyed camera.  But in a test clamping the cages together, the unit felt really good in my hands -- very easy to hold and handle.  The cable ends of the cage provide plenty of room for the remote cable and would even make it fairly easy to secure the cables to the cage itself.  
cage-detail.jpg

My initial reaction is to send the camera and cages back, since this is not a good time for me to take on a project and I'm still very happy with the NX1000 rig.  But I think it would be possible to make a good handling, very solid rig, with cables that are either fully enclosed with simple shrouding, or at least be well dressed up tight against the cages. Here is an even nicer cage for this camera.

...BC


Re: 3D Webcam Movie For 3D Pop-Up Gag

 

On Wed, Apr 21, 2021 at 02:34 PM, Roger Maddy wrote:
https://youtu.be/V7xItF9cSUk (in 3D)
And, of course, if the 3D webcam pop-up gag works in reality, it also works in virtual reality.
 
Hope this helps.


 
Stereoscopic parallel 3D image.


3D Webcam Movie For 3D Pop-Up Gag

 

Here's a 3D webcam movie with a camera tilt angle of -45 degrees. 
Let's watch it as a 3D pop-up gag by laying it flat on the ground, a table, or floating in the air, then viewing it at a -45 degree angle:
 


Re: SONY RX100 synch measurements

Antonio F.G.
 

On Tue, Apr 20, 2021 at 01:01 PM, timo@... wrote:
Flash works on my Sony a5100 rig, perfectly.
Great work, and very good document! I recall to see this some time ago but had forgotten.
I must read it carefully because I have plans to improve my NX1000 rig using Arduino, I got a little Arduino pcb some time ago, but have not yet started it. I sounds promising but I am not familiar with that environment: https://www.amazon.es/dp/B078HJDFLB/ref=pe_3310721_185740151_TE_item

I do not need to do anything about the flash (flash works quite well in the NX1000's). What I want is to improve the trigger of the cameras that is very unreliable. I suspect it is unreliable because the cameras were not intended to connect the USB ports together, so the logic levels are affected and works very marginally.
I want Arduino to send separate signals to the USB port of each camera, triggered by a double action switch, which I also have sleeping from some time ago: https://media.digikey.com/pdf/Data%20Sheets/Panasonic%20Electronic%20Components/EVPAJ_Series.pdf 

I notice in your document you only use the Arduino ATtiny85 for the flash delay, not for splitting the shutter signal that is split using diodes. But the diodes do not eliminate the bouncing of the switch. The spec of the switch I bought states 3ms/10ms. At which time of the bouncing will each camera react? IMO better send a clean switch signal without bouncing. This should be easy to handle by the Arduino.

Other improvement that could be made is to add a small delay to the triggering of one of the cameras, to compensate small differences in the trigger delay between the two units. I measured a difference of ~1ms between the cameras of my rig: http://afgalaz.es/stereo/synch_nx1000/

And other job for the Arduino could be to test the Werner's theory to power-on the cameras exactly at the same time. Perhaps some may say this could be done with a plain switch, but be sure the bouncing of a mechanical power switch like that will take ages!. No, this should be done with a power transistor controlled by a clean Arduino signal.


Regards
      Antonio


Re: SONY RX100 synch measurements

George Themelis
 

I had no problem with the Samsung NX1000 synchronization in most pairs I used (and still use). You just need to be careful not to change any setting (for example switch to continuous focusing, this is destroy synchronization). I did had other problems like “mode switching” or shutter running slow in one camera, etc. The cameras are older and prone to problems.

 

I agree that the Sonys are a lot more reliable. So far, I have had no problem with any of the Sonys. They also have nice features missing from the NX1000, for example image stabilization, viewfinder, etc.  The only thing I wish the Sonys had would be closer spacing when twinning. It seems that staggering the cameras is the best way to achieve close to normal spacing. For the A5000 and A6000 families bottom-to-bottom is also an option. Unfortunately, that’s not the case for the RX100 because the tripod screw is not centered with the lens.

 

George

 

From: timo@...
Sent: Wednesday, April 21, 2021 2:02 PM
To: main@photo-3d.groups.io
Subject: Re: [Photo-3d] SONY RX100 synch measurements

 

I found the Samsungs to be fairly reliable with the synchronization. Having to spray contact cleaner periodically into the mode dial was a minor problem, and having to check the first image of the day to see if the camera is recording to the SD card was a bit alarming.

 

I find the Sonys to be more reliable on all counts, and as a bonus, they produce far better jpg files, needing little or no adjustment in post (unless you enjoy that sort of thing).

 

Timo

 

On Apr 21, 2021, at 1:45 PM, Antonio F.G. via groups.io <afgalaz@...> wrote:

 

On Tue, Apr 20, 2021 at 08:13 PM, William Kiraly wrote:

It is tremendoulsy better than the horrible synch I had with the Samsungs.

My NX1000 rig is horribly unreliable to shoot, very often only one camera triggers. But when it decides to shoot the synchronism is very good.

Regards
    Antonio

 

 

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