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3D stereo experiments with adapted MF lenses
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PostPosted: Sat Sep 07, 2024 6:23 am    Post subject: Reply with quote
Now I'll offer one that will give you eye sore for sure. With it I ask you, if you are able to adjust your eyes looking at verious depths of the image. If you look at the tarmac your eyes need to focus cross eyed in a different way than if you look at the buildings in the back. Just give your eyes a little time to adjust to each depth of the image. Shooting out of the plane with parts of the image that are close and others far away with the same spatial displacement for all of it obviously won't work. Still the eyes can adjust, if you let them (although it's not a pleasant experience). Let me know how you're doing.



Now something more relaxing:

#1


#2


PostPosted: Sat Sep 07, 2024 7:03 am    Post subject: Reply with quote
backsidewalkaround wrote:


#2


Unfortunately, the flags did not cooperate. I find that, if you observe and wait, they may return briefly to the original positions, or near enough.


PostPosted: Sat Sep 07, 2024 8:06 am    Post subject: Reply with quote
e6filmuser wrote:

Unfortunately, the flags did not cooperate. I find that, if you observe and wait, they may return briefly to the original positions, or near enough.


Thanks, I'll consider it next time. On the other hand... The flag was moving and it feels like that in the stereo image too.


PostPosted: Sat Sep 07, 2024 8:26 am    Post subject: Reply with quote
backsidewalkaround wrote:
e6filmuser wrote:

Unfortunately, the flags did not cooperate. I find that, if you observe and wait, they may return briefly to the original positions, or near enough.


Thanks, I'll consider it next time. On the other hand... The flag was moving and it feels like that in the stereo image too.


I've just noticed: if I tilt my head up and down, first one view of the red flag become dominant, then the other.


PostPosted: Sat Sep 07, 2024 9:04 am    Post subject: Reply with quote
I‘ve no problem focusing in any of those - even the first where it takes a second! Like them a lot!


PostPosted: Sat Sep 07, 2024 9:29 am    Post subject: Reply with quote
simple.joy wrote:
I‘ve no problem focusing in any of those - even the first where it takes a second! Like them a lot!


Thanks. The first one is about where you focus. It's not possible to have the full picture in focus, just one slice at a time, if you know what I mean.


PostPosted: Sat Sep 07, 2024 9:30 am    Post subject: Reply with quote
e6filmuser wrote:
backsidewalkaround wrote:
e6filmuser wrote:

Unfortunately, the flags did not cooperate. I find that, if you observe and wait, they may return briefly to the original positions, or near enough.


Thanks, I'll consider it next time. On the other hand... The flag was moving and it feels like that in the stereo image too.


I've just noticed: if I tilt my head up and down, first one view of the red flag become dominant, then the other.


Funny. I can replicate that, but the dominance of the flag looking to the right is only very brief, when moving my head up and down.


PostPosted: Sat Sep 07, 2024 10:44 am    Post subject: Reply with quote
Ducati Motorbike. Olympus EM-1, Laowa 12mm.

There was considerable colour difference between the two images. This is surprising as the sun was shining for both. I have done some adjustment to colour balance. The result is OK for stereo.



PostPosted: Sat Sep 07, 2024 3:10 pm    Post subject: Reply with quote
e6filmuser wrote:
Ducati Motorbike. Olympus EM-1, Laowa 12mm.

There was considerable colour difference between the two images. This is surprising as the sun was shining for both. I have done some adjustment to colour balance. The result is OK for stereo.



For the stereo image, this doesn't matter (to me), because my brain chooses for me, what it wants to see. I've even made the same experience with one sharp and one unsharp image, but maybe that was because the image on the dominant side was sharp. I would have to purposely test that.
'


PostPosted: Sat Sep 07, 2024 4:24 pm    Post subject: Reply with quote
backsidewalkaround wrote:


For the stereo image, this doesn't matter (to me), because my brain chooses for me, what it wants to see. I've even made the same experience with one sharp and one unsharp image, but maybe that was because the image on the dominant side was sharp. I would have to purposely test that.
'


I find that to be always the case for me, although it may not work for all viewers, although I suspect that to be because those who find it a problem may be inspecting the individual images too much, rather than viewing both simultaneously, as intended. This is about one image being slightly, but noticeably soft, not with a big difference.


PostPosted: Sun Sep 08, 2024 10:24 am    Post subject: Reply with quote
Some car via A7r3 and CZJ Jenazoom 2 35-70mm at ca 70mm and f8 and f11.

This was to have been the last local Classic Car event of the year. However, overnight rain, including a spectacular thunderstorm, seems to have put people off. At the time when cars are usually queueing to get in, only 2 Classic and a newbie were there so I photographed them all.

I had intended to try this lens at the previous, crowded event but the diaphragm was stuck open. One repair later...

The lighting was dullish overcast.

2016 Fiat Spider 1368cc



Morris Traveller



2023 Nissan



PostPosted: Sun Sep 08, 2024 5:43 pm    Post subject: Reply with quote
Common Darter Sympetrum striolatum Male

Sony A7r3, Oshiro 2:1 Ultra Macro 60mm at f11.

At the end of the summer, dragonflies and damselflies move away for lakes, ponds, etc. to the open countryside, parks and gardens. Darters like to perch from where they can see their insect prey. They may have up to 3 such perches in a domestic garden.

This one was not around until this afternoon. I was surprised how close it let me get and how it tolerated me climbing on to a stool and off again several times to reach its level. Even so, these images are cropped by about 50%.









PostPosted: Sun Sep 08, 2024 9:07 pm    Post subject: Reply with quote
e6filmuser wrote:
Common Darter Sympetrum striolatum Male

Sony A7r3, Oshiro 2:1 Ultra Macro 60mm at f11.

At the end of the summer, dragonflies and damselflies move away for lakes, ponds, etc. to the open countryside, parks and gardens. Darters like to perch from where they can see their insect prey. They may have up to 3 such perches in a domestic garden.

This one was not around until this afternoon. I was surprised how close it let me get and how it tolerated me climbing on to a stool and off again several times to reach its level. Even so, these images are cropped by about 50%.



Dragonflies are really hard to capture in my experience, so great job!


PostPosted: Mon Sep 09, 2024 6:48 am    Post subject: Reply with quote
backsidewalkaround wrote:


Dragonflies are really hard to capture in my experience, so great job!


Thanks. Here are the images used in the second stereo cropped still more, showing more detail:



PostPosted: Mon Sep 09, 2024 7:31 am    Post subject: Reply with quote
e6filmuser wrote:
backsidewalkaround wrote:


Dragonflies are really hard to capture in my experience, so great job!


Thanks. Here are the images used in the second stereo cropped still more, showing more detail:



Excellent work!


PostPosted: Mon Sep 09, 2024 7:53 am    Post subject: Reply with quote
simple.joy wrote:
e6filmuser wrote:
backsidewalkaround wrote:


Dragonflies are really hard to capture in my experience, so great job!


Thanks. Here are the images used in the second stereo cropped still more, showing more detail:



Excellent work!


Thanks.

I would like to have used a different lens, just for testing, but I knew where that one was.


PostPosted: Mon Sep 09, 2024 9:19 am    Post subject: Reply with quote
I have issues to see those well due to the massive shift of background!
Details are great on those nevertheless!


PostPosted: Mon Sep 09, 2024 10:26 am    Post subject: Reply with quote
kds315* wrote:
I have issues to see those well due to the massive shift of background!
Details are great on those nevertheless!


Thanks. My feet didn't move as I was on a stool and would have fallen! They are cropped from the same images as used in the second stereo of my original post.


PostPosted: Wed Sep 11, 2024 8:40 am    Post subject: Reply with quote
Fuligo septica var. flava slime mould.

A7r3, CZJ Jenazoom 2 35 to 70mm MC Macro at 70mm, f11, closest focus (FOV ca 200mm wide), 1/20 sec at ISO 5000.

The first one has been cropped, mainly top and bottom. The second one is uncropped.

This is the first time I have used this lens for "macro". It would not replace any of my true macro lenses.






PostPosted: Fri Sep 13, 2024 7:03 pm    Post subject: Reply with quote
Leitz Wetzlar Focotar-2 50mm f4.5 on A7r3.

This lens is newly arrived and these are my first images.

The lens was at f11 and on 145mm extension from the flange. The FOV was 15mm wide and working distance 45mm. Twin TTL flash.

The images have been cropped by about a third laterally.

There was slight vignetting, with equally sized, tiny darkening in each corner.

I have used my normal processing form original RAW files.

This is a tiny mushroom, which I believe to be a Flammulaster species. It has lots of interesting detail.







PostPosted: Fri Sep 13, 2024 8:22 pm    Post subject: Reply with quote
e6filmuser wrote:
Leitz Wetzlar Focotar-2 50mm f4.5 on A7r3.

This lens is newly arrived and these are my first images.

The lens was at f11 and on 145mm extension from the flange. The FOV was 15mm wide and working distance 45mm. Twin TTL flash.

The images have been cropped by about a third laterally.

There was slight vignetting, with equally sized, tiny darkening in each corner.

I have used my normal processing form original RAW files.

This is a tiny mushroom, which I believe to be a Flammulaster species. It has lots of interesting detail.







Those are very nice. I also like the details and structures. I have a Focotar 2.8/40, brilliant little lens.


PostPosted: Sat Sep 14, 2024 7:31 am    Post subject: Reply with quote
Some from the same session as above but with the Focotar 50mm on 110mm extension from the flange on m4/3 EM-1. I chose this extension to make the subject similar size in the frame. FOV 15mm wide, working distance 75mm. The images have been cropped similarly except where indicated. f11.

I accidentally changed the aperture to f16 and the images are shown here.

Whereas the A7r3 uses huge flash gun standing high off the bench, the EM-1 uses small units only a few cm high. So there can be differences in lighting.

f11.






F16

Images not cropped.




Cropped



PostPosted: Mon Sep 16, 2024 12:25 pm    Post subject: Reply with quote
Slime Mould Fuligo septica through UV Topcon 35mm 3.5 on Sony A7r3.

I have uploaded images of this species previously, using other lenses. This colony was in shade but was very soon to be partially lit by sunlight. So I grabbed my camera with whichever lens it had on it. I had not previously used it.

The lens was set at f8 and at its closed focus, FOV 3mm wide, as shown in the first stereo pair.

Each image was prepared from TIFFs, the originals and the crops processed separately.










PostPosted: Mon Sep 16, 2024 2:03 pm    Post subject: Reply with quote
e6filmuser wrote:








Love these - very nice effect and great composition as well!


PostPosted: Mon Sep 16, 2024 2:31 pm    Post subject: Reply with quote

(Schneider Kreuznach Xenon 50 mm f/2 - Diax II)



(Agfa Ocellar 5 cm)
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