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3D stereo experiments with adapted MF lenses
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PostPosted: Sat Mar 29, 2025 9:52 am    Post subject: Reply with quote
Cherry blossom.

Sony A73r, Rayfact MJ 90mm f4 at f11 1/100 sec, ISO 250, hand held.



PostPosted: Sat Mar 29, 2025 6:40 pm    Post subject: Reply with quote
Clematis armandii

Sony A73r, Rayfact MJ 90mm f4 at f11 1/100 sec and 1/80 sec, ISO 250, hand held.






PostPosted: Sun Mar 30, 2025 7:16 am    Post subject: Reply with quote
Sony A73r, Samyang 85mm f1.4 at f11 100 sec ISO 250

These are from the same session as with the Rayfact. The images have similar, but not identical, framing. The processing might differ slightly.






PostPosted: Mon Mar 31, 2025 6:36 am    Post subject: Reply with quote
Here is another of the cherry blosson mages from the Rayfact, at f11, this time at closest focus.




PostPosted: Tue Apr 01, 2025 7:23 am    Post subject: Reply with quote
A couple of shots with the ISCO Göttingen Super-Kiptar 75 mm f/1.6 (projection lens):












PostPosted: Tue Apr 01, 2025 3:06 pm    Post subject: Reply with quote
Large Red damselfly.

From May, probably Olympus EM-1, Kiron 105mm at f11.



PostPosted: Wed Apr 02, 2025 2:55 pm    Post subject: Reply with quote
Since it is Spring...



Hypergon 26mm


PostPosted: Wed Apr 02, 2025 3:04 pm    Post subject: Reply with quote
Nice.

Those yellows and oranges remind me of the two eggs I had for breakfast this morning, not twins!


PostPosted: Wed Apr 02, 2025 11:27 pm    Post subject: Reply with quote
e6filmuser wrote:
Large Red damselfly.

From May, probably Olympus EM-1, Kiron 105mm at f11.



Very good detail on that damselfly!

kds315* wrote:
Since it is Spring...



Hypergon 26mm


Really beautiful. Love the combination of colors and what an interesting lens!


PostPosted: Thu Apr 03, 2025 6:14 am    Post subject: Reply with quote
Yes indeed, a lucky find that Hypergon!!!


PostPosted: Thu Apr 03, 2025 7:18 am    Post subject: Reply with quote
e6filmuser wrote:
Cherry blossom.

Sony A73r, Rayfact MJ 90mm f4 at f11 1/100 sec, ISO 250, hand held.



What a phantastic lens this is!!


PostPosted: Thu Apr 03, 2025 7:44 am    Post subject: Reply with quote
kds315* wrote:
e6filmuser wrote:
Cherry blossom.

Sony A73r, Rayfact MJ 90mm f4 at f11 1/100 sec, ISO 250, hand held.



What a phantastic lens this is!!


I hoped it would give excellent performance* from macro, through close-up to at least middle distance. So far, so good. Its official image circle of 86.4 mm gives it T/S scope. So far, I have used it only without extension. The Nikon F mount integrates it nicely into my range of lenses for my A7rs.

* Nikon: "High performance guaranteed in all range of magnification"

At around 880g it might not suit some potential users. However, the 95mm model weighs 1200g.


PostPosted: Fri Apr 04, 2025 2:37 pm    Post subject: Reply with quote
Pasque Flower Pulsatilla vulgaris

Sony A7r3, Olympus Auto Macro 135mm f4.5 bellow lens on 116mm Olympus OM telescopic extension, f11. Bright overcast. Hand held.




PostPosted: Wed Apr 09, 2025 4:03 pm    Post subject: Reply with quote
Primroses.

Sony A7r3, 45mm extension, Rayfact MJ90mm f4 at f11, furthest focus (first two, FOV 60mm wide) then closest focus 1:1.

I was not so interested in pretty pictures as what the lens would do.

I had to reduce the saved quality of the third image from 12 to 11 for it to load. That probably represents the amount of detail.









Last edited by e6filmuser on Fri Apr 11, 2025 9:45 am; edited 1 time in total


PostPosted: Thu Apr 10, 2025 3:13 pm    Post subject: Reply with quote
Angenieux 70 mm f/1.6 projection lens






PostPosted: Fri Apr 11, 2025 9:37 am    Post subject: Reply with quote
It may be of interest that, on the A7r3, the Rayfact MJ 90mm on extension gives:

On 3k, 4k, and 5k Nikon F extension (total 45mm, half focal length) it gives 35mm to 60mm FOVs. An additional 65mm extension gives FOV 20mm to 27mm. (No images yet)

I am expecting a delivery of more tubes next week.


PostPosted: Fri Apr 11, 2025 11:34 am    Post subject: Reply with quote
e6filmuser wrote:
It may be of interest that, on the A7r3, the Rayfact MJ 90mm on extension gives:

On 3k, 4k, and 5k Nikon F extension (total 45mm, half focal length) it gives 35mm to 60mm FOVs. An additional 65mm extension gives FOV 20mm to 27mm. (No images yet)

I am expecting a delivery of more tubes next week.


Thanks for the information. I've heard good things about this lens and the images look good for sure, but given that they're shot at around f/11 I'm not sure there's any noticable difference to a high-end enlarging lens. Have you ever tried to shoot it at f/4? Wide-open is usually where these lenses start to differentiate from the bunch of significantly cheaper alternatives. Would be very interesting to see.


PostPosted: Fri Apr 11, 2025 12:05 pm    Post subject: Reply with quote
simple.joy wrote:
e6filmuser wrote:
It may be of interest that, on the A7r3, the Rayfact MJ 90mm on extension gives:

On 3k, 4k, and 5k Nikon F extension (total 45mm, half focal length) it gives 35mm to 60mm FOVs. An additional 65mm extension gives FOV 20mm to 27mm. (No images yet)

I am expecting a delivery of more tubes next week.


Thanks for the information. I've heard good things about this lens and the images look good for sure, but given that they're shot at around f/11 I'm not sure there's any noticable difference to a high-end enlarging lens. Have you ever tried to shoot it at f/4? Wide-open is usually where these lenses start to differentiate from the bunch of significantly cheaper alternatives. Would be very interesting to see.


I don't think I have ever used any lens at f4! Certainly, I see no point with stereo. DOF is very precious with macro and I have maybe 1mm at the highest magnifications. This lens is supposed to be designed not to have such limitations. The image circle is huge (86.4mm), such that the part of it I am using is very telecentric. When I can see, in other images, pollen grains well-defined I don't worry about diffraction.


PostPosted: Fri Apr 11, 2025 1:45 pm    Post subject: Reply with quote
e6filmuser wrote:
simple.joy wrote:
e6filmuser wrote:
It may be of interest that, on the A7r3, the Rayfact MJ 90mm on extension gives:

On 3k, 4k, and 5k Nikon F extension (total 45mm, half focal length) it gives 35mm to 60mm FOVs. An additional 65mm extension gives FOV 20mm to 27mm. (No images yet)

I am expecting a delivery of more tubes next week.


Thanks for the information. I've heard good things about this lens and the images look good for sure, but given that they're shot at around f/11 I'm not sure there's any noticable difference to a high-end enlarging lens. Have you ever tried to shoot it at f/4? Wide-open is usually where these lenses start to differentiate from the bunch of significantly cheaper alternatives. Would be very interesting to see.


I don't think I have ever used any lens at f4! Certainly, I see no point with stereo. DOF is very precious with macro and I have maybe 1mm at the highest magnifications. This lens is supposed to be designed not to have such limitations. The image circle is huge (86.4mm), such that the part of it I am using is very telecentric. When I can see, in other images, pollen grains well-defined I don't worry about diffraction.


I understand! A pity we have such different priorities… I just thought it would be interesting to see what the lens can do wide open.


PostPosted: Fri Apr 11, 2025 5:27 pm    Post subject: Reply with quote
I love seeing your work well done guys!

Here is a pair with the Tokyo Kogaku RE GN Topcor M 50mm f1.4

Strange things you can find in the forest.


PostPosted: Fri Apr 11, 2025 7:18 pm    Post subject: Reply with quote
blotafton wrote:
I love seeing your work well done guys!

Here is a pair with the Tokyo Kogaku RE GN Topcor M 50mm f1.4

Strange things you can find in the forest.


Thank you!

Very nice looking result. Seems like a great lens judging by your non-stereo shots as well.


PostPosted: Fri Apr 11, 2025 7:48 pm    Post subject: Reply with quote
blotafton wrote:

Here is a pair with the Tokyo Kogaku RE GN Topcor M 50mm f1.4


I have the 35mm 3.5 to try but I don't know when. So many lenses! Laugh 1


PostPosted: Fri Apr 11, 2025 8:37 pm    Post subject: Reply with quote
Because of the other thread (on Minolta CE Rokkor lenses) I was reminded of the Computar DL 30 mm f/2.8 enlarging lens... what a weirdly unique and interesting lens this is:



PostPosted: Sat Apr 12, 2025 8:48 am    Post subject: Reply with quote
simple.joy wrote:
blotafton wrote:
I love seeing your work well done guys!

Here is a pair with the Tokyo Kogaku RE GN Topcor M 50mm f1.4

Strange things you can find in the forest.


Thank you!

Very nice looking result. Seems like a great lens judging by your non-stereo shots as well.




Thanks! It really has character. It's image quality is different from the norm with more glow and bubble bokeh. And the sharpness is excellent.

e6filmuser wrote:
blotafton wrote:

Here is a pair with the Tokyo Kogaku RE GN Topcor M 50mm f1.4


I have the 35mm 3.5 to try but I don't know when. So many lenses! Laugh 1


A perfect excuse to put all other lenses aside and try it!


PostPosted: Sat Apr 12, 2025 8:52 am    Post subject: Reply with quote
simple.joy wrote:
Because of the other thread (on Minolta CE Rokkor lenses) I was reminded of the Computar DL 30 mm f/2.8 enlarging lens... what a weirdly unique and interesting lens this is:



Looks great!

I've not see many photos with it. What are its the most special aspects?
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