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 Replies: 72 / Views: 9,816 |
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Pillar of the Community
Canada
2784 Posts |
first attemt with the sony a7r mark ii at high mag. looks ok but need to get use to moving the lights around. single phot no focus stacking. I am going to try that later.  |
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Pillar of the Community
 United States
4038 Posts |
Looks sharp. What was original image size and is this downsized, 100% crop, or ? And what lens / aperture / magnification?
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Pillar of the Community
 Canada
2784 Posts |
not sure ray. I thought I was finished. but I have to wait for another adapter. I ordered it from rafe. it was something new. that someone else wanted as well. could be trying put together the same setup. I know I will have to use focus stacking. if I go any higher in magnification.
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Pillar of the Community
Canada
2784 Posts |
ray this is something I have jimmy rigged together. I have a 10x microscope objective. I have a leitz relay lens. I attach a Olympus 50mm F 1.8. to the sony A7RmarkII. you have to put this all together. I am waiting for a connector that rafe is making for me. I also have a camera mount coming from China. so that I can mount all this on my bellows.. when it is compete ray. I will explain all the pieces. I will show how to connect them. I will give you all the lens information plus the distances. that way ray you can tell us the magnification. I am also going to test a 20X microscope objective. I tried it free hand. one letter on a coin fills the image on the sony a7r mark II. to focus the the letter I used the micro focus er. so that I could focus the letter top to bottom. that what I have been up to.
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Pillar of the Community
Canada
2784 Posts |
wanted to do another test removed the sony and all the pieces from my bellows. attached the canon camera. installed nikon m5 I got from ray. myself I think this little lens and my bellows. has as much magnification as the sony with all the other pieces on it. this is the letter N in cent on a five cent coin. this is a single photo no stacking.  |
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Pillar of the Community
United States
9395 Posts |
I assume this "Nikon m5" is a finite-corrected objective, so it shouldn't need any other lenses between it and the sensor? I wonder if there's any set of lenses that you could put between the objective and the camera to improve things (full sensor coverage, total system resolution given the pixel size, capture more information, or something else)?
Your pic looks quite sharp, especially without any stacking.
Most of the objectives I have require a tube lens of some sort, if you want to use them as they were designed. Stacking is also required, unless you're shooting something flat (like a USAF test target).
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Pillar of the Community
Canada
2784 Posts |
yes pepactonius I agree. here is the unit with a 20x microscope objective. the sony camera back attached not solid but will be soon. this is the reverse of 2 Canadian dimes. first one a 2016 the H represents the initial with a chip on it. this H represents the designers Emanuel Hahn. the second image represents a 2013 Canadian dime with a bead on top of his initial. these are single photo no stacking. this is the smallest mark on any of the Canadian coins I am aware of here are the images. the haze is stray light leaking in on my unit that will be fixed once the pieces get here   |
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Pillar of the Community
United States
9395 Posts |
Which 20X objective is this? The Mitutoyo 20X/0.42 M plan APO is pretty expensive, and it's hard for me to justify spending $2000 or so for it, when it would get hardly any use. Even the 10X ($800?) is not used all that much. It's not clear that my copy stand is really rigid enough to work well at 20X, anyway.
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Pillar of the Community
Canada
2784 Posts |
pepactonius this is a no name 20x microscope objective. pepactonius there is a person in the USA that about once a month. offers a box lot of microscope objective eye pieces. I got one of the boxes 60 dollars american. there is a lot of lens in those boxes. but most are no name and they are as is. I have purchased 2 of those lots and found some real jewels. Nikon, baush, and Olympus. this 20 is a no name works pretty good. you have a 10x Mitutoyo wow. you posted a image done by that lens. that is a very incredible lens. your image was outstanding. have a great one
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Valued Member
Russian Federation
172 Posts |
Hi. Let me show my attempt whithout stacking on my very cheep system. Just 4X finite no-name microscope objective and no more other optics, even eyepice and camera. It's a part of small coin about 18mm diameter  |
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Pillar of the Community
United States
9395 Posts |
Quote:
Let me show my attempt whithout stacking on my very cheep system. Looks really good for no stacking. I've had to use stacking on some small full-coin shots when the magnification gets up to the 1x range. Of course, I've also had to resort to stacking for some troublesome full-coin larger coins: - 2014 baseball coins (curved) - 2009 UHR $20 - many ancients |
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Valued Member
Russian Federation
172 Posts |
I think that bellow and direct projection on sensor is the only one way to achieve high magnification above 3:1 due to very high resolution of microscope optics for very small price. My X4 cost about $20 now in China. Another one example without stacking This letter is about 0.5mm  |
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Valued Member
United States
441 Posts |
Justwalking. ....how about seeing some pics of your setup?
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Valued Member
Russian Federation
172 Posts |
andywoj00  Up to down usb camera with 1/3" cmos sensor (8MP) C-mount to 42mm adapter Helicoid 42mm on both sides 42mm to c-mount adapter C-mount to RMS adapter 4#1061; Plan Achromat microscope lens and stand from old photographic enlarger That's all, exluding very simple lightning, no softbox, etc because I'm not true coins collector, I use it for another aplication with other optics. (sorry for some probably errors in names - learned english more then 30 years ago and it is not my native) |
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Valued Member
Russian Federation
172 Posts |
Interesting that with such small sensor the DOF and WD become huge. I can shot with only microscope objective from 200 mm!  |
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Pillar of the Community
Canada
2784 Posts |
very nice results. if you put the right glass in place. make sure no light is leaking in. you can shoot very high mag no problem. with a DSLR and glass you just got to make it solid. a lot of those ccd are not much good. I see you have a very good unit. but that not always the case. very good results Justwalking
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Replies: 72 / Views: 9,816 |
Posted 01/12/2017 3:13 pm
