Meteorite Macrophotography
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Meteorite Macrophotography
Very intersting images of meteorite thin sections under polarized light and special macro rig !!
https://www.dpreview.com/interviews/435 ... -interview
Enjoy,
https://www.dpreview.com/interviews/435 ... -interview
Enjoy,
Vishnu
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These are gorgeous, but given the nature of petrographic thin sections I am not sure if there's any advantage to this kind of rig over a normal polarized microscope? Mitutoyo objectives (we can't see the logo under the gaffer tape but I doubt he bought a seiwa or something) are great for 3D objects imaged in reflected light, but in this case the sample is already perfectly flat with transmitted lighting so a long working distance is unnecessary.
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No doubt, beautiful images. I've been using my Optiphot POL scope to image meteorite thin sections.
https://squattingdog.smugmug.com/Meteor ... hin-slice/
-JW:
https://squattingdog.smugmug.com/Meteor ... hin-slice/
-JW:
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Please elaborate on how thin sections of meteorite obtained ... ThanksSmokedaddy wrote:No doubt, beautiful images. I've been using my Optiphot POL scope to image meteorite thin sections.
https://squattingdog.smugmug.com/Meteor ... hin-slice/
-JW:
Vishnu
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There are many sources for thin sections. BTW, quality ones are quite expensive. Making them isn't a simple process. There is a member here on the forum that makes them too. I've purchased from these sources. You can also simply do a google search. Naturally eBay is another source.Vish_007 wrote:Please elaborate on how thin sections of meteorite obtained ... Thanks
http://www.petroslides.com
Meteorlab.com
http://www.excaliburmineral.com/meteoritesections.htm
https://topmeteorite.com/collections/thin-sections
https://www.lpi.usra.edu/meteor/metbull.php?code=7488
-JW:
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The iris is probably holding the polariser. The Minolta 5400 lens has grovings, using an iris allows one to convert it into normal threaded mounts easily.
Here's the method using a Nikon scanner lens:
Interestingly, he's likely using the ITL200 as a tube lens. I like his setup, similar to mine, it's based on thorlabs parts. The results are stunning too, one day I'll try it out as well.
Here's the method using a Nikon scanner lens:
Interestingly, he's likely using the ITL200 as a tube lens. I like his setup, similar to mine, it's based on thorlabs parts. The results are stunning too, one day I'll try it out as well.
JW, thanks a heck of a lot for introducing me to a group of expensive things I'd like to buy but shouldn't. Rock that came from the moon? From Mars? Egad--what would be like to have such samples in one's hand and under one's microscope?Smokedaddy wrote:There are many sources for thin sections. BTW, quality ones are quite expensive. . . .
--Chris S.
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Reminds me of those iris flange mounts for vintage barrel lenses in large format photography. But not sure about it being a sound idea. He's using a Mitutoyo MPA 10x, rated at NA0.28. I doubt it would be tolerant of 1-2mm of polarizer being in front of it at that NA.Macro_Cosmos wrote:The iris is probably holding the polariser. The Minolta 5400 lens has grovings, using an iris allows one to convert it into normal threaded mounts easily.
Cheers,
John
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Hey Chris,Chris S. wrote:JW, thanks a heck of a lot for introducing me to a group of expensive things I'd like to buy but shouldn't. Rock that came from the moon? From Mars? Egad--what would be like to have such samples in one's hand and under one's microscope?Smokedaddy wrote:There are many sources for thin sections. BTW, quality ones are quite expensive. . . .
--Chris S.
I've purchased some very interesting 'mineral' thin sections from Rob Gill at Geosec inexpensively.
https://geosecslides.blogspot.com/
I have several uncut meteorites too and they can get pretty expensive real quick. This guy is local to me;
https://aerolite.org/shop/iron-meteorites/
-JW:
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Yeah, the best way to demystify this would be to ask the photographer himself. I would not recommend holding such lenses with the cheap aperture mechanisms on the market, the lens falls out very easily. If one can get lockable apertures, that's better. The one I show is a cheap low quality part, and that's indeed not the way I mount such lenses.abednego1995 wrote:Reminds me of those iris flange mounts for vintage barrel lenses in large format photography. But not sure about it being a sound idea. He's using a Mitutoyo MPA 10x, rated at NA0.28. I doubt it would be tolerant of 1-2mm of polarizer being in front of it at that NA.Macro_Cosmos wrote:The iris is probably holding the polariser. The Minolta 5400 lens has grovings, using an iris allows one to convert it into normal threaded mounts easily.
Cheers,
John
Example: https://www.thorlabs.com/newgrouppage9. ... up_id=1479
Thank you and appreciate for posting links to meteorite thin sections, waiting to get good ones for imaging and chance to photograph....Smokedaddy wrote:There are many sources for thin sections. BTW, quality ones are quite expensive. Making them isn't a simple process. There is a member here on the forum that makes them too. I've purchased from these sources. You can also simply do a google search. Naturally eBay is another source.Vish_007 wrote:Please elaborate on how thin sections of meteorite obtained ... Thanks
-JW:
Vishnu
A fairly ridiculous contraption when he could get twice the resolution from a polarizing microscope. It negates the whole point of using a full frame pixel shifting camera whose full frame isn't even covered by the low NA objective. Lets see a single shot instead of a large stitch meant to wow with excessive contrast.
I am not young enough to know everything.