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 Replies: 46 / Views: 8,754 |
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Moderator
 United States
187702 Posts |
 to the Community, timothys_coins! |
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Valued Member
 United States
62 Posts |
@timothhys_coins: Yes, I think I am going to register on Thingiverse, it is just that I am having trouble accessing it from China.
The one attached to the lens is not generic, ie, the half mirror is sort of hard to find item, the slot is designed for that particular piece of mirror. But other designs are more or less generic, I have made the slot to be 2mm thick, enough to fit most UV filters, even with different printing materials -- like eSun black matte filament, I can make that slot 1.4mm thick and still fit, but with other cheap filament, I have to make it 2mm, else the glass wont't fit.
So, if I upload them, I have to think about people using different materials and with different printers, else, people will complain :-)
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Valued Member
United States
62 Posts |
OK, still could not access Youtube, so here is a 80x80 half mirror based one. Much easier to use, can handle larger coins, and lighting is much better. Did not activate Photoshop, too expensive  Shot two images in JPeg, so white balance might be off. Camera is 12 year old Canon 550D (Ti in US), El Nikkor 50 f/2.8 is extended normally (vs reversed), magnification is about 1.1x, two images stitched together using Microsoft ICE (Image Composite Editor). Sharpened a bit after stitch. Two layers of diffusion are added, one should be enough, but the lens cleaning paper is too thin, so added another layer, a piece of photography diffusion paper, outside, Setup  Stitched Image  Edited by mjkzz
12/07/2022 03:56 am
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Valued Member
United States
62 Posts |
Here are the two images, basically, just shoot one image, shift the whole thing, ie, the coaxial box up a bit and take another shot.   |
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Valued Member
United States
62 Posts |
In a plastic case, two images stitched together  |
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Moderator
United States
187702 Posts |
Looking good!  |
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Valued Member
United States
62 Posts |
thanks, jbuck. Here is another one, half dollar, it is a little big so I decided to shoot 4 images and stitch them together, with camera fixed, I simply moved the blue lift in previous post to take 4 shots, all took less than 10 minutes, including automatic stitching using Microsoft ICE I think there are a lot of room to do maybe even 3x3 shots for larger coins or at higher magnification, which might require stacking.   Edited by mjkzz
12/09/2022 05:12 am
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Valued Member
United States
62 Posts |
This 100 ptas silver coin is 34mm in diameter, with APS-C sensor, have to do it in 3 rows, but 2 colums is fine, so total 6 images. Will post how it is done in a video to show how easy it is. Sure, will post the 3D printing file somewhere.  |
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Moderator
United States
187702 Posts |
Very impressive. If you had not told us the images were composited, I would have never known. |
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Valued Member
United States
62 Posts |
Thanks jbuck. Yes, with Microsoft ICE (free software), it is very easy and since most coins have a lot "features", alignment is easy, so long as you have enough overlap. It looks like this is it, 80x80 half mirror is the one for fairly large coins and easy to use, shifting the whole thing by hand is easy, too, so stitching is possible. Over expose by 1 to 1.5 stops can brighten up the image without losing details. This one is stitched from 6 images, 1 stop over exposed.  Edited by mjkzz
12/10/2022 02:13 am
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Moderator
United States
187702 Posts |
Outstanding! |
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New Member
United States
7 Posts |
@mjkzz I have we chat if you want to send on there I can upload for everyone in US.
I also have a few 3d printers printing PLA+ and a carbon fiber nylon composite so I can also work up a few cura profiles.
I am still working on my parametric modeling and I have been trying to model this on my own since I saw your video :D
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Pillar of the Community
United States
9792 Posts |
As to the black background, I haven't tried this material myself but it looks promising, I was thinking of getting some for a flocking on one of my telescopes to reduce internal reflections from near by bright stars in my field of view, (sometimes an issue with one of my optical trains). Not the cheapest stuff, but next to Vanta-Black nanotube coating (expensive), it is the darkest material around. https://www.nextel-coating.com/prod...9-darkblack/"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013! ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector. See my want page: http://goccf.com/t/140440 |
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Bedrock of the Community
United States
19126 Posts |
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New Member
Ukraine
6 Posts |
Very. very impressive project. Thank you for your job. Is it open source project? Were I can get a STL files?
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Replies: 46 / Views: 8,754 |
First Page
Posted 12/01/2022 8:16 pm
