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Alternative Imaging Methods
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Old December 29th, 2006, 01:02 AM   #1
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I've got it :0

This is my final adapter. I found the screen I'm looking for. It will blow your mind...Okay, I'm blowing it out of porportion a little, but not really. The light loss is almost at 0..I have footage with the adapter on and off and you can barely tell when the adapter is on. The grain is gone. The only thing I see wrong is possibly the bokeh, for all the boken fans. It shows a little grain or maybe fuzzy or could just be noise. I haven't got the trained eye to tell the difference. All the boken was basically shot outside in the night. I'm super amped on this one. I'm going to post some full res shots later tonight possibly, really small ones and some grabs.

Here's a grab to get started
http://i57.photobucket.com/albums/g240/Car3o/Faucet.jpg
http://i57.photobucket.com/albums/g240/Car3o/Tomato.jpg
http://i57.photobucket.com/albums/g2.../TreeLight.jpg

No adapter and with adapter...I like it
http://i57.photobucket.com/albums/g2...o/Sunset35.jpg
http://i57.photobucket.com/albums/g2...SunsetNo35.jpg
Rich Hibner is offline   Reply With Quote
Old December 29th, 2006, 01:44 AM   #2
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A savage test is to shoot a subject under light shade with exposure correct for the subject, against a soft focus varyingly lit background such as vegetation with light or white coloured branches or trunks which overall is a correct match for your in-shade subject, but has direct sunlight burnouts on some of the white branches.

If you have a bokeh problem, this circumstance will bring it out as a "ghosting" effect where you have a fairly sharp centre and haze around the outside of the bright out of focus areas.

The ghosting artifact does not necessarily have to be a powerful evil. You just have to be more selective with your subject to background lighting balance.

Another quick test with lens-in-camera type camcorders for expected bokeh performance is to focus up your SLR lens on a bright highlight, manually defocus the relay, then with the groundglass running, turn your camcorder autofocus loose and keep the camera on the highlight.

If the autofocus attempts to go after the highlight through the groundglass and does not focus back onto the groundglass itself, your bokeh might not be what you want it to be on all occasions.

My personal preference is to surrender some bokeh performance for better low-light performance and sharpness and be careful with the subject.

Due to my habit of periodically switching in the autofocus momentarily and forgetting to switch back to manual, I have had a few autofocus "runaways" which can get a bit confusing. They nearly always happen when refocussing the SLR lens with the groundglass running.

I have two complete home-made adaptors, one with better bokeh performance than the other.

I think Dennis Woods pursues this approach more efficiently with an offering of several grades of groundglass which can be changed out for his Brevis adaptors.
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Old December 29th, 2006, 07:00 AM   #3
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Hey Rich. What is the screen you are using.
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Old December 29th, 2006, 08:40 AM   #4
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You can't come on here ranting and raving about your wonderful screen and not actually tell us what it is lol.
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Old December 29th, 2006, 01:37 PM   #5
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Here's video with the adapter on
http://www.filefactory.com/file/a3736a/
Rich Hibner is offline   Reply With Quote
Old December 30th, 2006, 01:35 PM   #6
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Good to see you're amped about this, and for good reason. Now, prepare yourself for the forum flogging -- get those running shoes on and you just might pass the gauntlet :D
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Realism, anyway, is never exactly the same as reality, and in the cinema it is of necessity faked. -- J-L G
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Old January 2nd, 2007, 11:10 AM   #7
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Some more video. The first clip was shot 1/60shutter speed
Second was normal settings. These are fully uncompressed avi files. Around 25mb's.

http://www.filefactory.com/file/78cd3f/
http://www.filefactory.com/file/81163f/
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Old January 9th, 2007, 10:01 AM   #8
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Are you using a screen or ground glass?
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