Granite pebble stone from Merced river in Yosemite

By using the magnet tapped to the camera of my phone to connect only the lens module of the foldscope, I enabled a way to image the surface of the pebbles. Interestingly, I have seen some very fragile while structure.

By breaking the pebbles, we can see an incredible difference outside/inside in terms of color and texture. So many shining white and black micas.

I wish I could have an app on my phone to take a stack in order to image in focus such “microscape”. Any tricks for achieving that ?

2 Comments Add yours

  1. Manu Prakash says:

    Beautiful post @thibaut. Here are a few tools you will find handy.

    1) in this post from 2015, I describe a series of tools and apps perfect for focus stacks.
    https://microcosmos.foldscope.com/?p=7830
    Including several desktop and iPhone apps (helicon, stackfocus etc). Do try this out.

    2) very similar to your hack, @laks described a beautiful way to image surfaces (surfing surfaces) in the post here: https://microcosmos.foldscope.com/?p=29111
    Overall these are fantastic ways to image surfaces since the flatness of the surface ensures that you don’t need too much focus control.

    Do watch the videos in links above – and I can’t wait to try this out on more rocks – specially rocks with embedded micro fossils! I happen to know a few places in San Francisco where we could collect something like that.

    Beautiful work!

    Cheers
    Manu

  2. tpollina says:

    Wow @Manu, those 2 posts are very interesting! I should definitely search on the blog itself to find tips !

    I will try for sure the tools and apps you are describing and reiterate my attempt!

    I’d love to collect and image the microfossils as well, it’s even more exciting!

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