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Equipment & Gear: Understanding Blender Specifications
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ParrotSlave



Joined: 08 Nov 2012
Posts: 2
Location: Houston, TX

PostPosted: Thu Nov 08, 2012 10:37 pm    Post subject: Reply with quote

If the glasses are so heavy that they're going to sink your nose into the nasal cavity, then I could understand going with plastic. Mine are -4.25 -50 x130 (right) and -3.75 -50 x035 (left) [sphere, cylinder, axis]. I have tried various plastic lenses several times, and what has driven me crazy is not chromatic aberration so much as the distortion at the edge of the visual field, which I find particularly disturbing when driving, especially at night. It's getting harder to find glass lenses, but I do note a Canadian company that still has high index ultra thin glass lenses that should work well in cases of extreme myopia: http://www.visionsofcanada.com/csi/awb/voc/high-myopia.asp. A separate problem is that the opticians tend to try and sell smaller lenses in glass, since they worry about the weight, and, unfortunately, when one is used to gigantic lenses, a shift in lens size can create difficulty in adjusting. I find myself still reverting to a 1996 pair of no-line trifocals with PhotoGray in Flexon frames--the best pair I ever had, also, coincidentally, the heaviest, and with the largest lenses. Opticians seem to have no understanding of physics as they try to "convert" me to the plastic religion.
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Jim Cooley



Joined: 09 Oct 2008
Posts: 285
Location: Seattle

PostPosted: Fri Nov 09, 2012 6:15 pm    Post subject: Reply with quote

Fascinating! Thanks for the links.
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PostPosted: Tue Jan 14, 2014 12:54 am    Post subject: Max power Reply with quote Delete this post

A correction to your statement about max/peak power. The maximum power of an electric motor occurs at 50% speed not right before stall. The maximum torque occurs at stall.
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