Electronics > Projects, Designs, and Technical Stuff
Harddrives - nice pictures
TheEPROM9:
--- Quote from: Noopy on January 05, 2020, 02:01:00 pm ---
--- Quote from: magic on January 05, 2020, 10:54:20 am ---Nice dust spots in the upper left :P
--- End quote ---
I have to clean my dslr sensor... ::)
But I´m not sure whether you can get rid of every dust spot with this kind of setup.
--- Quote from: legacy on January 05, 2020, 11:36:14 am ---what do use for taking pics like these? :o
--- End quote ---
Long story short:
Take a reflex camera (I have a Canon EOS 60D),
mount a lens reversed on the camera (to achieve this take a "retro adapter" // the shorter den lens the better, I have a 10-22mm),
mount distance rings between the camera and the reversed lens as long as the picture gets not too bad.
And there you have your microscope:
Magnification factor 30:1 but with 18 Megapixel! That is 120:1 for 1,2 Megapixel.
I can resolve 10µm without problems. Mostly 5µm is also no Problem. Beyond 5µm sometimes you can see somethin sometimes you have to guess and sometimes you loose... ;D
https://www.eevblog.com/forum/projects/decapping-and-chip-documentation-howto/msg2666622/
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I love that solution, I bet if you just fart it looks like an eathquake to the camera. I should try something simular with my Fuji. If I us my Macro 80mm f2.8 lens that should wok quite well.
I know I'm a Fuji man, but cannon make some beutiful lenses. So do Nikon, but it don't look like they are going to be around much longer.
TheEPROM9:
TESLA EPROM by TheEPROM9, on Flickr
I know its not a HDD, but its kind of relevent when you are taking shots of dies. Plus its a vintage EPROM, who does not love vintage EPROM's
Noopy:
--- Quote from: TheEPROM9 on January 07, 2020, 11:34:50 pm ---I love that solution, I bet if you just fart it looks like an eathquake to the camera. I should try something simular with my Fuji. If I us my Macro 80mm f2.8 lens that should wok quite well.
I know I'm a Fuji man, but cannon make some beutiful lenses. So do Nikon, but it don't look like they are going to be around much longer.
--- End quote ---
Thanks! :-+
You see your neighbour farting! ;D
I have positive experiences with a massive table and an esd-pad. The table is hard to move and the esd-pad does some damping. Of course only remote release the camera and mirror lockup is also very usefull.
Every company has it´s pro and cons. I just started with Canon... :)
But a good lens does not always perform good with the inversed setup! I was very disappointed looking at the pictures of my Canon EF 24-70mm f/2,8L which normaly takes lovely pictures! :wtf:
--- Quote from: TheEPROM9 on January 07, 2020, 11:36:16 pm ---...on Flickr
I know its not a HDD, but its kind of relevent when you are taking shots of dies. Plus its a vintage EPROM, who does not love vintage EPROM's
--- End quote ---
I also like other silicon pics! :-+ 8) As you can see here: https://richis-lab.de/
I will browse your pictures calmly, first I have go to work... :-/O
magic:
I suppose you need to use a lens designed for minimum object distance equal to the length of your reverse mounting rings. Such rule seems to kinda make sense if you think about what's happening here in terms of objects, images and ray traces through the lens ;)
Correct me if I'm wrong, but AFAIK focusing distance is not a typical strength of fast lenses.
Noopy:
I´m no expert regarding optics but the rings between camera and lens are irrelevant regarding the basic image quality.
More rings make the image darker and at some point the quality gets worse (with the complete setup I have theoretical 300nm/px :scared:) but a bad lens is a bad lens with zero and with six rings.
No idea what´s the key fact. EF-S 10-22mm is good, EF-S 18-135mm kit-lens is good, EF 24-70mm f/2,8L is bad. :-// :-// :-//
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