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Adventures in stereo photography

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Howard_S View Drop Down
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Post Options Post Options   Quote Howard_S Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2021 at 19:06
Thanks for these, Brian, some pleasing depth there, particularly in the first.

I took my QX1/HX90 combo to a local nature reserve, and it was useful to try things out there.

I think I used iAuto on both cameras and this resulted in different colour tonalities for each side of the photo. Fortunately, when these are viewed as 3D stereos the colour values merge. I'll try P-mode next time and will aim to get both cameras to do standard JPG colours (the QX1 has no Creative Styles available). Larger versions available if you click through to Flickr.

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Thanks for looking!


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My working method was to take JPGs from the left and right cameras, use a batch process in Stereo Photo Maker to create 'proof' Universal LR/RL images to review, select candidates for the final version, process the JPGs in Lightroom and use SPM to make Universal SBS views as shown here. I used the red/cyan anaglyph to preview these after auto alignment and to crop the final image to remove excess borders (the two source cameras use different aspect ratios).
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bonneville View Drop Down
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Post Options Post Options   Quote bonneville Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2021 at 19:41
Well they all work perfectly for me just freeviewing, although I do have to reduce the overall size (cmd and -) for it to work on my monitor. I find the size of SBS images in books, especially Brian May's, are just right for freeviewing to just drop in. Larger images defeat me.

The colours seem absolutely fine as well. The obvious difference in the last one of the tree is a good example. In 3D it looks just right.

I do like stereoscopic photography, are we the only ones?

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Post Options Post Options   Quote Howard_S Quote  Post ReplyReply Direct Link To This Post Posted: 22 April 2021 at 00:27
Originally posted by bonneville bonneville wrote:

I do like stereoscopic photography, are we the only ones?


It seems like it sometimes! Though to be fair there have been some positive responses in this thread. Thank you too for your C&C, Brian.

As I have researched things further - particularly in the direction of setting up stereo rigs for twin cameras as an alternative to the Fuji cameras - I have become aware of rules and guidelines which seem to be a primary concern for some practitioners. To my mind it gets in the way of the enjoyment of stereo photography. Perhaps we should shoot first and ask questions later.

Stereo Photo Maker is a remarkable piece of software. The following pair was taken with an A900 and an A7 III cabled together with my improvised intervalometer cable connectors (Minolta/Sony Remote on the A900 and Multi on the A7 III)


A900 (L) A7 III (R) test

The A900 lens was set to 28mm and the other to 24mm; I handheld both cameras pointing them roughly on the same axis and direction. Gratifyingly the cameras fired at pretty much the same time and SPM could detect enough in both frames to align a passable stereo view in the right-half of each frame.

That setup (mixing cameras with old- and new-style remote sockets) was replicated with an A65 (right) and a QX1 with smartphone as monitor (left):


QX1 (L) and A65 (R) stereo test

The separation of the two lenses is about 11cm, which - in one of the rules I do pay attention to - means that the nearest subject should not be closer than about 30x that, or 3m. Both cameras have crop sensors, from 2014 and 2011 respectively. The view above is rendered by SPM as


QX1/A65 3D sample /1

And perhaps with more interesting depth


QX1/A65 3D sample /2

But this is a rather impracticable set up - it's heavy (especially with the DT 16-50 F2.8 lens on the A65) and Brian's interest in creating a set up with two RX100M3 or similar-sized cameras is a workable direction to aim for. I can't wait to see results!

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bonneville View Drop Down
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Post Options Post Options   Quote bonneville Quote  Post ReplyReply Direct Link To This Post Posted: 22 April 2021 at 08:52
QX1/A65 3D sample /2 - “more interesting depth”. I should say so. The separation of the pot and the daffs from the background is amazing.
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Post Options Post Options   Quote Howard_S Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2021 at 20:14
Thanks again, Brian.

A few more shots now, this time created using the so-called cha-cha or sequential method - first take the left frame, move a little and then the right. Stereo Photo Maker does a great job in aligning things.



The walk near the site of a Deserted Medieval Village, first investigated in the mid-C19. Nothing much to see on the ground, but the light through the trees shows some depth.



A bit in your face!



A classic view of depth, at a safer distance.



I like the way the light here - reflections and shadows - plays around and reveals some depth.
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Post Options Post Options   Quote Howard_S Quote  Post ReplyReply Direct Link To This Post Posted: 30 April 2021 at 22:31
The other day I met up with Phil again to try out some candidate lenses for my Sony A900. There was a brief opportunity to try out firing Sony A900s at the same time and in the spirit of inquiry we set up the two cameras at our cafe table at the Bodleian and pointed them across the road.


Stereo triggering test

Here we see the two cameras each connected by their remote control sockets to a Y-cable and on to an intervalometer/remote control.

The separation of the lenses is about 30cm, good for subjects 9m or more away.

We fired the shutter a few times


Stereo test for synchronisation

And here you see five pictures in a sequence taken over 60 secs or so. The synchronisation is good in four of the photos - only the second shows a serious difference in timing between the two cameras.

I made a stereo pair out of the last set, and if you can do the magic eyes trick or have a viewing aid you should see it:


Stereo test pair


Edited by Howard_S - 03 May 2021 at 08:33
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Hezu View Drop Down
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Post Options Post Options   Quote Hezu Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2021 at 09:27
In the last picture pair, I'm somewhat bothered that the colours are quite different (and I think the right side is also tad sharper in addition of having brighter colours). I presume that is due to the fact that you had different lenses on those cameras.
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Post Options Post Options   Quote Howard_S Quote  Post ReplyReply Direct Link To This Post Posted: 01 May 2021 at 09:54
Originally posted by Hezu Hezu wrote:

In the last picture pair, I'm somewhat bothered that the colours are quite different (and I think the right side is also tad sharper in addition of having brighter colours). I presume that is due to the fact that you had different lenses on those cameras.


I agree it’s not ideal, and you’re right, different lenses were used and likely different processing. I find that the differences merge when you view them as stereos, but for you the differences seem to be an impediment. The experiment was to show that near simultaneous pictures can be taken, close enough together to make stereos of live action.
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Post Options Post Options   Quote Howard_S Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2021 at 08:34
Originally posted by Howard_S Howard_S wrote:

Originally posted by Hezu Hezu wrote:

In the last picture pair, I'm somewhat bothered that the colours are quite different (and I think the right side is also tad sharper in addition of having brighter colours). I presume that is due to the fact that you had different lenses on those cameras.


I agree it’s not ideal, and you’re right, different lenses were used and likely different processing. I find that the differences merge when you view them as stereos, but for you the differences seem to be an impediment. The experiment was to show that near simultaneous pictures can be taken, close enough together to make stereos of live action.


I found the control that matches the colour of the left and right images and replaced the stereo pair above. Thanks for the comment, Hezu.
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Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2021 at 10:44
Shows how observant I am, I thought you had your 24-85 on your A900! Using a Minolta/Tamron pair was probably not ideal colourwise, and I know we we a little out in FL too (me 30mm, you 35). If we do it again we should try matching primes!

I need to get a viewer of some sort to see any 3D from the screen - my eyes won't do the cross-eyed thing since old-age forced me into reading specs.

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Post Options Post Options   Quote Howard_S Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2021 at 12:31
Originally posted by Phil Wood Phil Wood wrote:

Shows how observant I am, I thought you had your 24-85 on your A900! Using a Minolta/Tamron pair was probably not ideal colourwise, and I know we we a little out in FL too (me 30mm, you 35). If we do it again we should try matching primes!

I need to get a viewer of some sort to see any 3D from the screen - my eyes won't do the cross-eyed thing since old-age forced me into reading specs.


The EXIF reports 24-105mm F3.5-4.5; it doesn't say the brand though. Is this in fact the Tamron 28-75 lens shown in the photo? Is the lens ID incorrectly interpreted?

As for a viewing aid, I use the Lite OWL (https://shop.londonstereo.com/lsc-owl-viewer.html) to look at photos landscape on my phone or portrait on my iPad. If you subscribe to the Adobe photo package you can view them in a synced collection in the mobile version of Lightroom, or indeed in the Flickr app.

Another source of the Lite OWL is with this pack of Victorian stereo cards of Oxford - https://bodleianshop.co.uk/products/oxford-printing-3d-postcard-pack

If you're trying to view stereo pairs on a web site like Dyxum, then the trick is to use Command and - to reduce the page size such that a pair 'works' with the viewing aid' Command and 0 restores a normal page size.

Edited by Howard_S - 03 May 2021 at 13:07
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Post Options Post Options   Quote Howard_S Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2021 at 16:11
Originally posted by Howard_S Howard_S wrote:

The EXIF reports 24-105mm F3.5-4.5; it doesn't say the brand though. Is this in fact the Tamron 28-75 lens shown in the photo? Is the lens ID incorrectly interpreted?


I have now checked: Preview on the Mac and Sony Edit both identify the lens correctly. Lightroom does not.

Edited by Howard_S - 03 May 2021 at 16:15
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Post Options Post Options   Quote bonneville Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2021 at 16:34
Howard, apologies for not joining in sooner as I do enjoy 3D experimentation, but other events have taken me away from my toys and I'm slipping behind in my photo and Raspberry Pi projects. (It is often said, and proving to be very true, that now I am retired there aren't enough hours in the day!). My plans to use two RX100iii bracketed together are on pause, due mainly to the cost of sourcing a second RX purely for stereo as I have just spent some of my pension on a comparatively rare silver/chrome Minolta X-700 that should be here tomorrow. More info to come in the film threads.

Anyway, back on topic, I don't have a problem with mismatching of colours or exposures of two images as I find that they blend well as a 3D image and sometimes seem to enhance the effect.

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Post Options Post Options   Quote bonneville Quote  Post ReplyReply Direct Link To This Post Posted: 03 May 2021 at 16:39
..... forgot to also mention, "A bit in your face" is very good. The difference in positioning of the forward branch is very distinct in the separate images but through my prismatic spectacles it really is a bit in the face
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