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Larry Morales
red out of focus
on Mar 28, 2011 at 8:33:24 pm

i recently had a shoot with the red mysterium and it turned out to be a horrible experience.
a green screen shoot went well(4k). an interior shoot at 2k through a teleprompter went well.
then we moved poolside... our f-stop was between 4 and 5.6. sunny daylight. nearly full wide.
zoomed in with the expanded focus numerous times and checked focus... all fine.
had a 7 inch marshall and a 17 inch sony monitor there. when we got the raw files back to base we found the subject to be completely out of focus. the focal plane seemed to be about 5 feet behind him.
truly unfortunate was the fact that i never rolled(i always have) on my focusing because card space was limited. any ideas on what may have caused this? the only thing i can think of(other than my own ineptitude the 6 or 8 times i focused) was that there may have been light inadvertently falling on the angled glass of the teleprompter.

any answers appreciated even if i have to suck it up.

many thanks,

LM

tvmambo


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Jeremy Garchow
Re: red out of focus
on Mar 28, 2011 at 10:43:06 pm

How are you viewing these files?

Just curious.


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Kris Anderson
Re: red out of focus
on Mar 29, 2011 at 6:32:22 am

What debayer have you used when processing your footage?


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Larry Morales
Re: red out of focus
on Mar 29, 2011 at 12:38:05 pm

hi there.

we shot in 2k and used the half DeBayer. Ultimately, the product is for the web.

tvmambo


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Larry Morales
Re: red out of focus
on Mar 29, 2011 at 1:00:21 pm

i believe it was through the redcine x.
we also viewed the files through fcp.
the focus issue was there on the files.

it's perplexing, to say the least.

thanks, all.

tvmambo


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Jeremy Garchow
Re: red out of focus
on Mar 29, 2011 at 2:17:56 pm

Redcinex @ 1:1?

Log and transfer can also soften images.

I'd suggest doing a full Rez export out of RCX with full everything and check out that file.


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Kris Anderson
Re: red out of focus
on Mar 29, 2011 at 9:00:55 pm

Is it a softness like an optical/lense softness or is it like a digital artifacts softness?


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Larry Morales
Re: red out of focus
on Mar 29, 2011 at 9:31:56 pm

Definitely an optical/lens softness. It very much looks like. I was focusing five feet farther. Three previous scenes and one later scene were fine.
Interesting, ay? In a bad way, of course.

tvmambo


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Russell Lasson
Re: red out of focus
on Mar 30, 2011 at 2:38:34 am

What lenses?

Was focus set my tape measure or viewfinder? Was the focus assist scale used on set?

Russ

Russell Lasson
Colorist/Digital Cinema Specialist
Color Mill
Salt Lake City, UT
http://www.colormill.net


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Uli Plank
Re: red out of focus
on Mar 31, 2011 at 12:52:14 pm

Are you sure your back-focus was correct?

Director of the Institute of Media Research (IMF) at Braunschweig University of Arts


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Larry Morales
Re: red out of focus
on Apr 1, 2011 at 10:51:40 am

sorry for tardy response.
we did not use tape measure, we did use focus assist and we focused(that we can actually recall) 5 or 6 times. as you know, in 2k/hd when you focus it's literally on the subjects pores... in this case his whiskers.

it could not have been the back focus because the scenes prior to this one are all in focus and the scenes after this one (sans teleprompter) are all in focus. it's this batch of takes, at this particular location, at this hour of the day, with the teleprompter, outside, sunny.

btw, the lens was the red 18-85, t 2.9-t22 zoom.

many thanks, all.

tvmambo


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Sam Roberts
Re: red out of focus
on May 10, 2011 at 2:57:18 am

Depending on the (zoom) lens if you zoom in to focus and then pull back wider the lens won't hold the focus. Focus assist and focusing at the desired focal length is best.



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