 | | | "real " cameras in xsi | "real " cameras in xsi 2005-06-12 - By Dan Yargici
Back
Is there a table of different film back sizes? I have to admit to not
fully understanding this... the film back size is the measurement of a
physical piece of the camera or digital camera's sensor yes? So
presumably this is the hard thing to establish? I mean, anyone can find
out the lens used on a shot, but where does one learn the film back size
of an Arri Flex 435 Xtreme? Have I completely got the wrong end of the
stick here?
Cheers,
DAN
kim aldis wrote:
>Have you looked at the film plane tab in the camera ppg? Enabling this gives
>you focal length and film back size parameters to mess with.
>
>
>kim@(protected)
>kim@(protected)
>
>
>
>
>
>>-- --Original Message-- --
>>From: owner-xsi@(protected)
>>[mailto:owner-xsi@(protected)] On Behalf Of Stefan Andersson
>>Sent: 12 June 2005 11:47
>>To: XSI@(protected)
>>Subject: Re: "real" cameras in xsi
>>
>>another thing... would be really really really really nice if
>>the good people at Softimage could include this as a script
>>for future versions (or change the camera behavior).
>>
>>regards
>>stefan andersson
>>
>>
>>On 6/12/05, Stefan Andersson <sanders3d@(protected)> wrote:
>>
>>
>>>Thanks for the info... I'll see if I can figure this out :)
>>>
>>>regards
>>>stefan andersson
>>>
>>>
>>>On 6/12/05, Dirk <news4dirk@(protected)> wrote:
>>>
>>>
>>>>To determine the field of view use this formula
>>>>
>>>>alpha = 2*arctan(d/(2*b)
>>>>
>>>>To dertermine the focal length convert the formula as follows
>>>>
>>>>b = d/(2*tan(alpha/2))
>>>>
>>>>with
>>>>alpha = aperture angle (FOV)
>>>>d = 24.892mm (for horizontal)
>>>>d = 18.912mm (for vertical)
>>>>b = focal length in mm
>>>>
>>>>Pay attention to the different film back values for the
>>>>
>>>>
>>horizontal
>>
>>
>>>>an vertical measurement.
>>>>XSI unfortunately don't convert vertical to horizontal FOV
>>>>automatically if you switch from one to the other.
>>>>
>>>>
>>>>
>>>>Stefan Andersson wrote:
>>>>
>>>>
>>>>
>>>>>Is there anyone out there that has a conversion script
>>>>>
>>>>>
>>or something
>>
>>
>>>>>to convert camera info to "xsi camera info".
>>>>>When I try matching footage and have all the info from
>>>>>
>>>>>
>>the client,
>>
>>
>>>>>I still end up "eyeballing" it because I have no idea on how to
>>>>>convert the info to xsi.
>>>>>
>>>>>regards
>>>>>stefan andersson
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
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>>>--
>>>http://www.sanders3d.com/
>>>
>>>
>>>
>>--
>>http://www.sanders3d.com/
>>
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