Infinite Vs Finite w/ Tube Lens, Now This is Interesting

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RobertOToole
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Infinite Vs Finite w/ Tube Lens, Now This is Interesting

Post by RobertOToole »

Lou gave me an idea last night so just for fun I swapped the Xenon for my Lomo 3.7x 0,11 on the Makro-Symmar

Can you guess the IDs with these 100% crops?

Which is which?

Lomo 3,7 0.11 + Makro-Symmar 120 at 3.7x

Mitutoyo M Plan 5x + Sigma 150 OS pushed down to 3.75x.


Image

Image

Robert

RobertOToole
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Post by RobertOToole »

Just one note.

I need to add that the Lomo 3,7 is not as sharp as the mitutoyo M Plan 5x when its on extension alone.

Robert

elimoss
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Post by elimoss »

Wow! Good work! Care to try the Lomo on the Raynox DCR-250 or 150? Or even the 4x $17 dollar generic knurled objective on the DCR-250? Because those are inexpensive combos.

JH
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Post by JH »

Interesting!

My guess is that the first one is the Mitutoyo because the CA colours on the first one looks like the CA I see with my Mitutoyo.

I do not have a waffer so I can not test it my self, but my experience is that the Canon mp 35 mm macro works quite well in combination with some tube lenses - so if possible it would be interesting to se a comparrison.

Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo

RobertOToole
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Post by RobertOToole »

elimoss wrote:Wow! Good work! Care to try the Lomo on the Raynox DCR-250 or 150? Or even the 4x $17 dollar generic knurled objective on the DCR-250? Because those are inexpensive combos.
Yes, I think the DCR-250 + $17 4x might work pretty well together.

The stacking combos are hit or miss sometimes. You can take two good objectives and the aberrations don't cancel, they magnify these together.

RobertOToole
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Post by RobertOToole »

JH wrote:Interesting!

My guess is that the first one is the Mitutoyo because the CA colours on the first one looks like the CA I see with my Mitutoyo.

I do not have a waffer so I can not test it my self, but my experience is that the Canon mp 35 mm macro works quite well in combination with some tube lenses - so if possible it would be interesting to se a comparrison.

Best regards
Jörgen Hellberg
Hi JH,

I did try a MP-20 and it was not very good but I think I was pushing too much magnification, something like 6x, but I am sure there is a good tube lens out there somewhere that would work well for both MPs.

Let me know if you experiment on the MP-35.

Robert

dolmadis
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Post by dolmadis »

This test reminded me of other work by a Member................

https://www.photomacrography.net/forum/ ... soldevilla
I have just visually tested all my microscope objectives in front of an achromatic 120mm focal length and I do not have vignetage with any. I see spherical aberration in the 4x, but that lens is the one that worries me the least, because it works perfect with the zoom.
BR


John

JH
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Post by JH »

Usually I have found no gain using a finite objective outside its specifications. The exceptions I use from time to time is a Nikon plan apo 20x 0.75 0.17 160 mm and a Nikon plan apo 10x 0.45 0.17 160mm that both works at 210 mm.

With a 20mp FF camera the Canon mp 35 mm seems to work quite well for example with the ITL 200. For ease of use the mp35 objective is better on a bellow, but my testing skills is not so good that I can decide if the image quality is better or worse when I use it with a tube lens.

Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo

RobertOToole
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Post by RobertOToole »

So the answer is that the first crop, the cooler toned image is from the Mitutoyo. The second and warmer toned image is the Lomo 3,7 + Makro-Symmar 120.

I have some more examples of the Lomo+MS tube lens from some recent testing, the results are even better than I thought at first, I will post these in a couple of days when I get a chance.

Thanks for the all of the comments.

Robert

Lou Jost
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Post by Lou Jost »

This is so interesting, thanks for taking a crazy chance and making these tests! The Lomo is a great lens even in its normal use on extension, but your tests on a tube lens show that it is even more versatile than we thought.

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