Olympus UK E-System User Group

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-   Macro (http://e-group.uk.net/forum/forumdisplay.php?f=77)
-   -   First Stereos via Laowa x5 Lens (http://e-group.uk.net/forum/showthread.php?t=48082)

Harold Gough 10th June 2018 07:00 AM

First Stereos via Laowa x5 Lens
 
I obtained this, recently-launched, lens a few days ago.

There are difficulties using it, but only those encountered with other fully manual macro lenses at similar magnifications. (I have several). One of those is that at the highest magnification, and f11 or f16 (nominal), bright sunlight on the subject is needed to prevent the light-starved sensor from jumping around, keeping nothing sharp in the viewfinder.

I have been trying various magnification and aperture combinations but have chosen to present results from the ultimate of f16 and x5 set on the lens. This gives a FOV 3.5mm wide, equivalent to 10:1 on full frame, a little higher than my previous setups (as used: they can do more).

With this combination in particular, the DOF is almost non-existent, a fraction of a millimetre. My ability to get the plane of focus accurately is the major factor and there is some room for tiny improvements in these images but they look OK at the size displayed

The images in these crosseye stereos are uncropped

The subject is an Ascomycete fungus Dasyscyphus bicolor. It gets it named from mostly having an egg yolk yellow middle and a white cup. It varies in the colouring and in whether it has a stalk. This is the first time I have knowingly seen this species which is "widespread".

Olympus EM-1, Laowa 25mm f2.8 Ultra Macro 5x, triple flash, hand-held.

Harold

http://www.fredmiranda.com/forum/ufi...?ts=1528364076

http://www.fredmiranda.com/forum/ufi...?ts=1528364076

mik 10th June 2018 07:16 AM

Re: First Stereos via Laowa x5 Lens
 
I wish i could view these, i spent hours in the past, i even bought one of those viewing boxes, it sort of worked.

Harold Gough 10th June 2018 07:34 AM

Re: First Stereos via Laowa x5 Lens
 
Quote:

Originally Posted by mik (Post 448773)
I wish i could view these, i spent hours in the past, i even bought one of those viewing boxes, it sort of worked.

I can provide colour anaglyphs if you have the cinema-type specs. If not, I can tell you where to get free ones.

Harold

MikeOxon 10th June 2018 07:57 AM

Re: First Stereos via Laowa x5 Lens
 
Quote:

Originally Posted by mik (Post 448773)
I wish i could view these, i spent hours in the past, i even bought one of those viewing boxes, it sort of worked.


I have to swap the images over (left-right) to see the stereo, as mentioned at https://e-group.uk.net/forum/showthread.php?t=48042


Very impressive images!

mik 10th June 2018 08:09 AM

Re: First Stereos via Laowa x5 Lens
 
Quote:

Originally Posted by Harold Gough (Post 448775)
I can provide colour anaglyphs if you have the cinema-type specs. If not, I can tell you where to get free ones.

Harold


Thanks,i do have glasses for anaglyph and a 3D monitor for MPO files, just could never get the free viewing.

Harold Gough 10th June 2018 08:16 AM

Re: First Stereos via Laowa x5 Lens
 
Conventional & Anaglyph stereos:

http://e-group.uk.net/forum/picture....pictureid=2819


http://e-group.uk.net/forum/picture....pictureid=2820

Harold

mik 10th June 2018 08:21 AM

Re: First Stereos via Laowa x5 Lens
 
My wife just reminded me my 3D monitor packed in

mik 10th June 2018 08:28 AM

Re: First Stereos via Laowa x5 Lens
 
Just had a quick look and most of what i have to hand are from my early W3 days, i put them in an album


https://www.flickr.com/photos/723917...57697277669544

Jim Ford 10th June 2018 08:58 AM

Re: First Stereos via Laowa x5 Lens
 
I used to be able to view these, but the last year of so I've got wet macula degeneration in my right eye. Vision in the affected eye is distorted, as well as there being an indistinct area. This means that images in both eyes don't match up.

The only positive from this condition, is that it's a real conversation stopper in company, when you relate how you have to have an injection into the eyeball every month!

Jim

Harold Gough 10th June 2018 11:55 AM

Re: First Stereos via Laowa x5 Lens
 
Quote:

Originally Posted by mik (Post 448786)
My wife just reminded me my 3D monitor packed in

My understanding, from a quick search, is that it would not help you with these.

Harold

Harold Gough 10th June 2018 12:13 PM

Re: First Stereos via Laowa x5 Lens
 
Quote:

Originally Posted by Jim Ford (Post 448801)
I used to be able to view these, but the last year of so I've got wet macula degeneration in my right eye. Vision in the affected eye is distorted, as well as there being an indistinct area. This means that images in both eyes don't match up.

The only positive from this condition, is that it's a real conversation stopper in company, when you relate how you have to have an injection into the eyeball every month!

Jim

I had an MRI last month. When I blink involuntarily I see two parallel, white circular patters, built up of concentric rows of white "bricks" This kind of thing (many different shapes) is called phosphenes and can either be harmless or indicate and impending serious condition.

They found nothing of concern including anything related to strokes.

Harold

Jim Ford 10th June 2018 06:06 PM

Re: First Stereos via Laowa x5 Lens
 
Quote:

Originally Posted by Harold Gough (Post 448814)
I had an MRI last month. When I blink involuntarily I see two parallel, white circular patters, built up of concentric rows of white "bricks" This kind of thing (many different shapes) is called phosphenes and can either be harmless or indicate and impending serious condition.

They found nothing of concern including anything related to strokes.

Harold

Yes, I hope it's nothing serious. With wet macula degeneration you can get 'proper' hallucinations. I don't get them and am a bit disappointed - hallucinations without the use of banned substances!

Jim


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