Photo of Ploum

Images taken in a controlled environment or with a posed subject. All subject types.

Moderators: rjlittlefield, ChrisR, Chris S., Pau

JL
Posts: 157
Joined: Sun Feb 02, 2014 10:15 am
Location: Houston, Tx

Post by JL »

I am surprised that you can get a 0.01 micrometer precision with a mechanical system, the best I have seen are microscope fine focus mechanisms at a whole 1 micrometer. I can only guess that you have a sort of multiplier (or rather a de-multiplier) built into your system.

If sometime you fell like disclosing how did you build your system, it would be very instructive for us, and particularly for me. I understand that your equipment and technique gives you an advantage over other photographers, and you might want to keep it as a trade secret.

Do not pay attention to anybody trying to mock about your system, as they say in english "the proof is in the pudding", and your photos are awesome.

Regards.

José Luis.

Pau
Site Admin
Posts: 6051
Joined: Wed Jan 20, 2010 8:57 am
Location: Valencia, Spain

Post by Pau »

ploum, you have truely excellent mineral images. I most love your brookite floating in the icy quartz sea :shock:
Pau

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

Thanks a lot JL, for me it's exactly that. If results are good, system is good.

I can just said this :

In standard system all people use same technic but you can move optic system or object. But it's the same principe.

I have imagine an other system. The direct projection of image on captor is not my solution.

I prefer study primary image.... by a decoupler optic system. For me that's evident than primary image (directly on captor for standard system) is easy to study by a secondary optic system, without big precision.

Primary image have ever size between 18 mm- 24 mm. A bridge ith close-up as raynox DCR 250 are perfect....

I use now a GF5 with a 17 mm captor just less than primary image. I have discover also than an other lens you can increase the precision between 2 parts of my optic system.

GF5 is better for me because i like classic photo and different objective are intéressant.... But REFLEX have no advantage (heavy) in my system but all is possible.


Sorry if my English is unperfect :).
I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

thanks for all comments

variscite fov 1.5 mm APO pLAN 10x

Image

libethenite fov 1.5 mm APO PLAN 10x
Image
I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

Pau wrote:ploum, you have truely excellent mineral images. I most love your brookite floating in the icy quartz sea :shock:
;) yes i like it, colorless of quartz is like ice ocean, thanks for this image.
I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

GemBro
Posts: 261
Joined: Wed Aug 20, 2014 5:20 pm
Location: Surrey [UK]

Post by GemBro »

D a m n ... a 1000 shots ... manually? ... :shock: ...

ploum ... how come the fly's eye is not as sharp as the rest of the stack? ... I am surprised to see it out of focus, especially with a 1000 shots taken ... would that be due to vibration at 10x? ...

I too would be interested in seeing your Rig/setup as well ... and thanks for replying, regarding your actual specifications earlier in this thread ;) ...

Love the minerals too ... the Brookite and azurite is my fav also ...

Gem
Canon 550D(T2i) ML (Nightly Builds) | Canon 5D MKII | Raynox 250 | Palinar 35mm f2.8 (reversed) | EL-Nikkor 50mm f2.8 N | EL-Nikkor 50mm f4 N | EL-Nikkor 50mm f4 | Bellows | Objectives: LOMO 3.7x 0.11 : 8x 0.20 : 40x 0.65
RiG II - 'Bamboo': Olympus CH Focus Block with Inverted Arca/Swiss | Canon 430 EX (x2) | Olympus T20 flash (x2) | Youngnuo YN-622C Wireless triggers (x3) | Ikea Jansjo 3W LED Lighting (x3)
Stepper Motor Focusing System (Helicon Remote)

rjlittlefield
Site Admin
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Joined: Tue Aug 01, 2006 8:34 am
Location: Richland, Washington State, USA
Contact:

Post by rjlittlefield »

JL wrote:... the best I have seen are microscope fine focus mechanisms at a whole 1 micrometer.
Focus blocks can do a lot better than that, when equipped with a drive that can make very small rotations of the fine focus shaft. See for example the setup and measurements HERE.
I am surprised that you can get a 0.01 micrometer precision with a mechanical system
...
I can only guess that you have a sort of multiplier (or rather a de-multiplier) built into your system.
From what I can see in the posts and signature ("manfrotto 454 but uncommon system. No limitation, no motorisation, good precision."), I'm guessing that ploum is using a screw drive that's heavily geared down. That's a reliable approach, but I agree that it's highly unlikely to really deliver 0.01 micrometer movements. That sounds like a number that one gets by calculation rather than measurement.

On the other hand, we have ploum's comment that he gets more precision at higher magnification. That comment could be explained if he's doing fine focus by tweaking tube length. In that case, movement of the front focal plane is equal to movement of the rear focal plane divided by magnification squared, so 0.01 micrometer at the front and 20x would be 4 micrometers at the rear, and that's definitely a feasible movement.

--Rik

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

GemBro wrote:D a m n ... a 1000 shots ... manually? ... :shock: ...

ploum ... how come the fly's eye is not as sharp as the rest of the stack? ... I am surprised to see it out of focus, especially with a 1000 shots taken ... would that be due to vibration at 10x? ...

I too would be interested in seeing your Rig/setup as well ... and thanks for replying, regarding your actual specifications earlier in this thread ;) ...

Love the minerals too ... the Brookite and azurite is my fav also ...

Gem
I will try with my mitutoyo 10x and compare results ;). I hope a better result for you. I have done 1500 photo....
I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

a try with mitutoyo (not the best mitutoyo i think....)

Better in corner but i prefer noname objective

Next time i try an other light ;)

Image
I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

Hum i think i have found problem : lightning

Insect prefer less diffusion lighning. For minerals i have two form of diffusion.

For insect, simple diffusion are the best.

Result comes.... 1500 photo has been done at x10 APO noname
I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

last version....

not time to work problem of transparence

1500 photo APO plan 10x and my manfrotto plate ;).

Image
I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

i try a last time without something to see difference
I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

some other test.....

10x with crop 100 % fov is 1.5 mm

crop fov is 0.3 mm



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40 mm componon crop 100 %

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I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

ploum
Posts: 256
Joined: Sat Oct 18, 2014 6:35 am
Location: France

Post by ploum »

welcome in my minerals world :)

nikon cfi 4x - fov 3.5 mm

Image
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I work with a manfrotto 454 but uncommon system :).
Objectives : BW APO PLAN 5x, Mitutoyo APO PLAN 7.5x, 10x, 20x and 50x, Seiwa APO PLAN 20x, BW APO PLAN 20x, Seiwa APO PLAN 10x, Nikon CF PLAN 50x, componon APO 40 mm, Componon 50 mm, Componon S 80 mm, Componon 105 mm, Componon 150 mm, Rodagon 135 mm.....

abpho
Posts: 1524
Joined: Wed Aug 17, 2011 7:11 pm
Location: Earth

Post by abpho »

That last image is great because of the subject isolation. Very clean.

I once had a geode that I cut open myself. It had some nice structures in it. But they were dirty (from the cutting). After rinsing it in water the crystals were all broken. :(
I'm in Canada! Isn't that weird?

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