Thread: Camera phone competition April 2019: Three of a Kind
View Single Post
robthebold is offline robthebold
2019-05-03 , 16:59
Posts: 1,038 | Thanked: 3,981 times | Joined on Nov 2010 @ USA
#95
Originally Posted by Marshall Banana View Post
I know, technically too late. But what is time at tmo?

This is a picture of the sun taken with my N900. I think the two reflections come from the two shades of the sun filter (shown in second image) used to take the picture.

The sun filter is printed SLA parts with a foil from a 3.25 floppy disk as filter material.
The point of this image was to use the N900 as a sextant for celestial navigation. But sadly the accelerometer is not accurate enough, the mean error from six measurements was >1 °.
That's ingenious. Does is snap on the kickstand magnetically?

Also, if you're interested in pursuing this solar project further, I've got leftover eclipse glasses from which you could re-purpose the foil if you want it. According to my neighbor the photographer, it's 1 million:1 transparent (or would that be opaque?). I suppose that's about 20 f-stops. I haven't verified this, but it does work to bring the light of the sun down to a level you can stare at it.

And thanks for adding the picture even if it was late.
 

The Following 7 Users Say Thank You to robthebold For This Useful Post: