Low mag success, high mag lens dirty? Help!
Feb 08, 2015 • 12:53 PM UTC
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140x Magnification
Microorganisms
Katharine Honan
I am a middle school science teacher, teaching grades 6-8, using inquiry to inspire interest in and knowledge of the world around us. Concord, NC, USA
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Human Hair 140X LED/condenser…successful.
I set up the Foldscope with the condenser lens and LED setup, and high mag lens, using a 3 stack of paper slides as supplied. All worked except I couldn’t get a clear focus (lens looked spotty – maybe my inability to focus in/out correctly/or just how a high mag lens looks? Seemed dirty.). Tried the low mag lens with LED/condenser setup and it worked well. Tried the camera on my less than smart phone, but the “shutter” speed was too slow to get a clear shot. Setting up on my school’s iPad worked, creating this photo. Shutter speed was everything as I worked with the Foldscope focus (which is not simple on the iPad – may have to upgrade my phone).
I set up the Foldscope with the condenser lens and LED setup, and high mag lens, using a 3 stack of paper slides as supplied. All worked except I couldn’t get a clear focus (lens looked spotty – maybe my inability to focus in/out correctly/or just how a high mag lens looks? Seemed dirty.). Tried the low mag lens with LED/condenser setup and it worked well. Tried the camera on my less than smart phone, but the “shutter” speed was too slow to get a clear shot. Setting up on my school’s iPad worked, creating this photo. Shutter speed was everything as I worked with the Foldscope focus (which is not simple on the iPad – may have to upgrade my phone).
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