Quickie Tutorial: Making Hand-held Stereo Pairs
Jun 16, 2016 21:12:39 #
Making stereo pairs is not the finely exacting process that the makers of stereo cameras and accessories to allow re-positioning the camera would have you believe. For most image pairs a distance between the two lens positions cane be around two and one half inches to four inches...coming close should serve fine!
It helps to be in a solid position so that your head doesn't move between exposures. Lean back against a tree or building ...or a solid companion. To avoid the necessity of cropping later, just keep the camera roughly level and keep both exposures at the same level. It helps to center the view on some very distant detail. Be sure to move the entire camera the chosen distance...don't just rotate the camera on its vertical axis.
See the two attached stereo pairs. Some people can easily accomplish 3-D viewing, others take a bit of practice. Personally, I find it most convenient to view them on my cell phone or tablet using "parallel viewing" ( Left image-left eye, right image-right eye. I put my nose close to the junction between the two images,.. and slowly increase the distance of the display until three images appear...the center one is the one upon which to concentrate and in which depth will seemingly miraculously appear. Some prefer to focus their eyes above the display at some distant thing and they bring the display into view...again, concentrate on the illusory central image to see the 3D effect.
Some find crossed-eye viewing easier. See the link.
Good luck and have fun.
Dave
It helps to be in a solid position so that your head doesn't move between exposures. Lean back against a tree or building ...or a solid companion. To avoid the necessity of cropping later, just keep the camera roughly level and keep both exposures at the same level. It helps to center the view on some very distant detail. Be sure to move the entire camera the chosen distance...don't just rotate the camera on its vertical axis.
See the two attached stereo pairs. Some people can easily accomplish 3-D viewing, others take a bit of practice. Personally, I find it most convenient to view them on my cell phone or tablet using "parallel viewing" ( Left image-left eye, right image-right eye. I put my nose close to the junction between the two images,.. and slowly increase the distance of the display until three images appear...the center one is the one upon which to concentrate and in which depth will seemingly miraculously appear. Some prefer to focus their eyes above the display at some distant thing and they bring the display into view...again, concentrate on the illusory central image to see the 3D effect.
Some find crossed-eye viewing easier. See the link.
Good luck and have fun.
Dave
Jun 16, 2016 21:46:45 #
I did quite a bit of stereo photography a few years ago. In my experience, most people prefer viewing stereo images through (red/cyan) anaglyph glasses rather than by cross-eye method, as they find it more comfortable, less strenuous. In response, I converted my stereo pairs to single anaglyph images (using a freeware stereo converter) and then purchased a pack of plastic anaglyph glasses to distribute to friends I shared my stereo images with.
Jun 16, 2016 22:14:09 #
Thanks for looking, Rook, and for your comments.
Most, I think, prefer the parallel-eye viewing as opposed to crossed-eye viewing as being more comfortable yet some do prefer the crossed-eye technique as...you guessed it ..."more comfortable". Go figure!
This system requires no special equipment and simply a modicum of skill in making an exposure, moving the camera a few inches in the same horizontal plane, and making another.
Incredibly easy to get a good result.
That's all.
Dave
Most, I think, prefer the parallel-eye viewing as opposed to crossed-eye viewing as being more comfortable yet some do prefer the crossed-eye technique as...you guessed it ..."more comfortable". Go figure!
This system requires no special equipment and simply a modicum of skill in making an exposure, moving the camera a few inches in the same horizontal plane, and making another.
Incredibly easy to get a good result.
That's all.
Dave
Jun 16, 2016 22:21:09 #
There was a member here a few years ago that was really into this. He'd post shots almost daily but I never did get it. I can't remember his name and I haven't seen him here for quite a while. As I recall, now & then he'd try to get folks in the gallery section to post "side by sides" as he called them.
Walt
Walt
Jun 16, 2016 23:12:26 #
Whuff wrote:
There was a member here a few years ago that was really into this. He'd post shots almost daily but I never did get it. I can't remember his name and I haven't seen him here for quite a while. As I recall, now & then he'd try to get folks in the gallery section to post "side by sides" as he called them.
Walt
Walt
Hi, Walt,
Thanks for heads-up, but I did the search and found no one who fit the M.O. you describe. If his name comes to you, I'd appreciate you letting me know.
Thanks,
Dave
Jun 16, 2016 23:51:45 #
...and here is a link to a particularly informative site dealing especially with axial displace the of he camera/lens in making stereo pairs ... depending on the distance to the closest detail it may range from as little as 1 inch to as much as 10 feet or more!
https://www.lhup.edu/~dsimanek/3d/stereo/shifty.htm
Live n'learn!
Dave
https://www.lhup.edu/~dsimanek/3d/stereo/shifty.htm
https://www.lhup.edu/~dsimanek/3d/stereo/shifty.htm
Live n'learn!
Dave
https://www.lhup.edu/~dsimanek/3d/stereo/shifty.htm
Jun 17, 2016 08:53:49 #
Like Whuff, I recall the fellow but not his name. I got the car shots almost straightaway but the the little cart just won't do it for me. Guess some will see it much easier than others.
Jun 17, 2016 11:54:20 #
magnetoman wrote:
Like Whuff, I recall the fellow but not his name. I got the car shots almost straightaway but the the little cart just won't do it for me. Guess some will see it much easier than others.
Hi, magneto man,
Try the cart again, a square crop may make it easier to see the 3D.
Dave
Jun 17, 2016 12:06:29 #
Here's an example of a more close-up image pair, as well as a graphic that may help explain some principles and terminology.
Dave
Dave
Jun 17, 2016 13:29:10 #
Uuglypher wrote:
Hi, magneto man,
Try the cart again, a square crop may make it easier to see the 3D.
Dave
Try the cart again, a square crop may make it easier to see the 3D.
Dave
Just can't get it Dave. I wear bifocals and wonder if they might be causing the problem? If I manage to get a centre image it is very narrow, and sometimes I'm starting to see four images!!
Jun 17, 2016 14:08:47 #
Yep! Bifocals could easily be the problem; They are for me!
I have cheapo set of low-power (1.75 Diopter) "reading glasses" that I use when working on my iPad. Makes a BIG difference in parallel viewing of stereo pairs (I find parallel viewing far easier than "crossed-eye viewing")
Are you sure you are not using crossed-eye viewing? The images must be reversed in position if you are.
here is the same set for crossed-eye viewing
Dave
I have cheapo set of low-power (1.75 Diopter) "reading glasses" that I use when working on my iPad. Makes a BIG difference in parallel viewing of stereo pairs (I find parallel viewing far easier than "crossed-eye viewing")
Are you sure you are not using crossed-eye viewing? The images must be reversed in position if you are.
here is the same set for crossed-eye viewing
Dave
Jun 17, 2016 14:21:57 #
Uuglypher wrote:
Yep! Bifocals could easily be the problem; They are for me!
I have cheapo set of low-power (1.75 Diopter) "reading glasses" that I use when working on my iPad. Makes a BIG difference in parallel viewing of stereo pairs (I find parallel viewing far easier than "crossed-eye viewing")
Are you sure you are not using crossed-eye viewing? The images must be reversed in position if you are.
here is the same set for crossed-eye viewing
Dave
I have cheapo set of low-power (1.75 Diopter) "reading glasses" that I use when working on my iPad. Makes a BIG difference in parallel viewing of stereo pairs (I find parallel viewing far easier than "crossed-eye viewing")
Are you sure you are not using crossed-eye viewing? The images must be reversed in position if you are.
here is the same set for crossed-eye viewing
Dave
I've never been able to do that Dave!
Jun 17, 2016 14:43:03 #
magnetoman wrote:
I've never been able to do that Dave!
Hi, Mag,
I can do it, if forced to...but it gives me one helluva headache!
A hint for parallel viewing (if you haven't tried it....)
Bring the paired images close with the line between them touching your nose. Slowly move the images away and the central, illusory 3D image may be better able to be maintained for good focus.
Did you try the close-up of the charger and wires?
Jun 17, 2016 16:33:58 #
Uuglypher wrote:
Hi, Mag,
I can do it, if forced to...but it gives me one helluva headache!
A hint for parallel viewing (if you haven't tried it....)
Bring the paired images close with the line between them touching your nose. Slowly move the images away and the central, illusory 3D image may be better able to be maintained for good focus.
Did you try the close-up of the charger and wires?
I can do it, if forced to...but it gives me one helluva headache!
A hint for parallel viewing (if you haven't tried it....)
Bring the paired images close with the line between them touching your nose. Slowly move the images away and the central, illusory 3D image may be better able to be maintained for good focus.
Did you try the close-up of the charger and wires?
I've got it! Both the charger and the cart photo now. I've been using the nose on iPad method and have now found tipping the top of pad away from my face a little does the trick. The cart is particularly effective. Do an ebookfull and I'll buy a copy!
Jun 17, 2016 20:02:48 #
magnetoman wrote:
I've got it! Both the charger and the cart photo now. I've been using the nose on iPad method and have now found tipping the top of pad away from my face a little does the trick. The cart is particularly effective. Do an ebookfull and I'll buy a copy!
Hi, Magman!
Which worked best for you? Parallel or crossed-eye viewing?
You have an iPad? You can take your own images! For stereo pairs I most often just use my iPad or cellphone ( then just email the images to the iPad where I then complete the process. An iPad app I find useful almost daily is Keynote, the presentation program.
With the images in the iPad "stereo Pair" album in "Photos" I crop them to desired shape with an image processor (I use "Photogene"). Make sure that a distant background detail is in the same spot in both images. Take them to Keynote, open your "Stereo" presentation; and paste/ mount them side-by-side on a blank card for viewing (left-eye-image on the left for parallel viewing, or left-eye-image on the right for crossed-eye viewing) . Check that their orientation is good for 3D viewing, and take a screen shot to have the finished stereo pair sent to "Photos". You can then move the stereo pair wherever you wish to keep them.
Check this site; it contains a number of links to galleries of stero pairs
https://www.lhup.edu/~dsimanek/3d/view3d.htm
Dave
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