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Old 07-07-2010, 11:07 AM
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wasyoungonce (Brendan)
Certified Village Idiot

wasyoungonce is offline
 
Join Date: Jul 2006
Location: Mexico city (Melb), Australia
Posts: 2,358
Now my daughter is back at the "home"...I can post & leave web pages up!

Here are some quick pics. Outside focus/inside focus x 2 (diffraction rings). I used Antares for this.

M8 (enlarged crop) focus backed off, 60s sub.
M8 enlarged crop 300s sub.

M8 crop enlarged focus backed off (only a very very slight hue)...and the same with focus done at 10X liveview (notice the hue).


edit:
One thing...the outside focus diffraction rings had a blue hue on the upper right quadrant and violet on the lower left! pretty much same inside focus diffraction rings.

Focusing was accomplished by 10X live view then backing off & taking 60s subs to see the result. This is not ideal and easy to get frustrated. Anyone know if a Bahtinov mask can be designed for yellow wavelengths diffraction focus pattern? Indeed what wavelength are the masks made for?

I did some Avi's of focusing in/out but have not reviewed them yet.

Once again thanks to all members for helping me with this! and putting up with my wayward daughter!
Attached Thumbnails
Click for full-size image (outside focus.jpg)
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Click for full-size image (outside focus 2.jpg)
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Click for full-size image (inside focus.jpg)
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Click for full-size image (focus backked off.jpg)
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Click for full-size image (focus back off 5 mins .jpg)
117.6 KB31 views
Click for full-size image (at focus M8 60s exp.jpg)
78.9 KB37 views

Last edited by wasyoungonce; 07-07-2010 at 11:23 AM.
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