But won't I need to change the size of the film back?
Ron Ganbar
email: ron...@gmail.com
tel: +44 (0)7968 007 309 [UK]
+972 (0)54 255 9765 [Israel]
url: http://ronganbar.wordpress.com/
On 11 October 2011 15:16, Remco Consten <rcons...@gmail.com> wrote:
>
> I think it doesn't really matter because It keeps the 16:9 aspect... You
> will only lose resolution while tracking....
>
> Remco Consten
>
>
> 2011/10/11 Ron Ganbar <ron...@gmail.com>
>
>> Right,
>> thanks guys.
>>
>> Here's one last twister.
>> I took the 3k footage and shrunk it down to 1280x720. Does this change
>> everything again?
>>
>>
>>
>> Ron Ganbar
>> email: ron...@gmail.com
>> tel: +44 (0)7968 007 309 [UK]
>> +972 (0)54 255 9765 [Israel]
>> url: http://ronganbar.wordpress.com/
>>
>>
>>
>> On 11 October 2011 10:20, Remco Consten <rcons...@gmail.com> wrote:
>>
>>> Hi all,
>>>
>>> Here you have a handy website I recently found.
>>>
>>> It will give you a filmback for each setting. 3k, 3k ana, 4k etc. for
>>> different camera's
>>> http://arenafilm.hu/alsog/dofcharts/
>>>
>>> Remco Consten
>>>
>>>
>>>
>>>
>>>
>>> 2011/10/11 Randy Little <randyslit...@gmail.com>
>>>
>>>> I didn't say it was constant, I gave the size for shooting 4k. The
>>>> lens focal length is constant as long as the mount is to spec for the
>>>> given mount. and by constant I mean the focal length of a lens
>>>> doen't change with the amount of image plane being used. So a 25mm is
>>>> a 25mm (sort of) regardless of the resolution you are using on the
>>>> red. The only thing that changes is perceived angle of view. The
>>>> focal length is the distance of the real nodal to the film plan
>>>> always. This changes with focal distance as when you focus the
>>>> rear nodal point moves to adjust convergence on the focal plane (not
>>>> to be confused with focus plane)
>>>> Randy S. Little
>>>> http://www.rslittle.com
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Tue, Oct 11, 2011 at 01:14, Ron Ganbar <ron...@gmail.com> wrote:
>>>> > Thanks guys for all your help.
>>>> > But I think I'm confused now. There's conflicting answers in here I
>>>> believe.
>>>> > Randy says the lens is as is with a constant film back size (22.2mm x
>>>> > 12.6mm), while Misho says I should use 0.96 conversion for the lens.
>>>> > Basically it's a Red One shooting 3K with an 18mm lens.
>>>> >
>>>> > Thanks again all.
>>>> >
>>>> > Ron Ganbar
>>>> > email: ron...@gmail.com
>>>> > tel: +44 (0)7968 007 309 [UK]
>>>> > +972 (0)54 255 9765 [Israel]
>>>> > url: http://ronganbar.wordpress.com/
>>>> >
>>>> >
>>>> > On 10 October 2011 21:00, Simon Björk <si...@stillerstudios.se>
>>>> wrote:
>>>> >>
>>>> >> The Red can capture footage in a variety of ways, 4K 16:9, 2K 16:9
>>>> etc,
>>>> >> and they all crop the sensor in different ways. To find out what
>>>> sensor size
>>>> >> you should use, just multiply the pixels of your image by 0.0054 (the
>>>> size
>>>> >> of the pixels on the sensor in mm).
>>>> >> For example, if the camera captured footage in 4K 16:9 (4096x2304)
>>>> you
>>>> >> could calculate the sensor size like this:
>>>> >> 4096*0.0054 = 22.11mm
>>>> >> 2304*0.0054 = 12.44 mm
>>>> >> /Simon
>>>> >> 2011/10/10 Misho Ristov <mi...@fx3x.com>
>>>> >>>
>>>> >>> Red One 0.96 in
>>>> >>> Red Epic 1.0885 in
>>>> >>>
>>>> >>> -
>>>> >>> Misho
>>>> >>>
>>>> >>>
>>>> >>> On 2011.10.10 8:27 PM, Ron Ganbar wrote:
>>>> >>>
>>>> >>> Hi all,
>>>> >>> needing to cam track some Red footage. Anybody knows what the film
>>>> back
>>>> >>> is, and if I should change the focal length to compensate for a
>>>> different
>>>> >>> size film back?
>>>> >>>
>>>> >>> Thanks,
>>>> >>> Ron Ganbar
>>>> >>> email: ron...@gmail.com
>>>> >>> tel: +44 (0)7968 007 309 [UK]
>>>> >>> +972 (0)54 255 9765 [Israel]
>>>> >>> url: http://ronganbar.wordpress.com/
>>>> >>>
>>>> >>>
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>>>> >>>
>>>> >>> --
>>>> >>> ___________________________
>>>> >>> Misho Ristov
>>>> >>> VFX Supervisor
>>>> >>> FX3X
>>>> >>> www.fx3x.com
>>>> >>> Jane Sandanski 108/28
>>>> >>> 1000 Skopje, Macedonia
>>>> >>> cell +38970385680
>>>> >>> office +38925511985
>>>> >>> fax +38925511902
>>>> >>>
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