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Mailinglist:PanoTools NG
Sender:luca vascon
Date/Time:2012-Aug-30 12:00:20
Subject:Re: Re: Black Magic raw video camera

Thread:


PanoTools NG: Re: Re: Black Magic raw video camera luca vascon 2012-Aug-30 12:00:20
No, no way. 2.5X.
The article is misleading and not well done.

2012/8/25 panovrx <#removed#>

> It looks like the Blackmagic Cinema Camera (BCC) will start shipping in
> the next week or two.
>
>
> http://magazine.creativecow.net/article/is-the-new-blackmagic-cinema-cam...
>  This article has interesting images showing the crop factor of the BCC
> with the 8-15mm Canon fisheye. (in the Crop Factor section about a quarter
> of the way down the page). He argues the crop factor varies from 1.2X to
> 2.5X as the lens is zoomed from 8mm to 15mm. And the equivalent focal
> lengths for a full frame camera are then 10mm to 37mm. If that analysis is
> correct that is a very useful range of full frame fisheye focal lengths.
> One issue with that lens for the BCC is that it only takes rear gelatine
> filters so standard glass ND filters can't be used. The BCC has a limited
> shutter speed range (1/25 to 1/180th I think) so this ND filter issue is a
> significant operational restriction for that lens on the BCC. It would be
> interesting maybe to test how much the resolution falls off as the lens is
> stopped right down.
>
> If you want to see some DNG sequences from the camera you can download
> them here
> http://forum.blackmagicdesign.com/viewtopic.php?f=2&amp;t=15
> (the links are the text line (zip file name) above the stills from the
> video).
>
> The resolution of the camera for DNG output is 2432x1366. So you could
> shoot an indefinite number of 360 panoramas at say 2400 by 4800 without
> worrying about shutter life and still have the advantage of raw capture. So
> for timelapse etc it is interesting for panos I think . Also there are LANC
> controllers for it so stereo sync for stereo panoramas might be possible.
> But the physical size of the camera (a little larger overall than a 5D)
> precludes close range twin camera stereo pano capture (too large a minimum
> inter lens separation).
>
> PeterM
>
>
> --- In #removed#, luca vascon <luca.vascon@...> wrote:
> >
> > Oh yes!! And fully awesome panovideos too!!!
> > :-D
> > I was wandering how 4.5mm Sigma behaves on an hacked GH2 or on a PEN too.
> > Have to try it!!!
> >
> > Il giorno 17 aprile 2012 12:46, panovrx <panovrx@...> ha scritto:
> >
> > > What can panoramists do with this:
> > >
> > >
> http://www.personal-view.com/talks/discussion/2888/black-magic-design-an...
> > > Canon EF mount (or Zeiss ZF aka Nikon?)
> > > Crop factor is maybe 2.5X -- so what HFOV from a 8-15mm Canon say
> > > A use finally for the 4.5mm Sigma perhaps
> > > The critical thing for my dreams for a Canon mount Raw video camera
> like
> > > this is how much rolling shutter it has. Is it a new gen CMOSIS global
> > > shutter sensor. Then you can stabilise fisheye footage perfectly --
> without
> > > residual rolling shutter waviness. Finally perfect transition movies.
> > >
> > > PeterM
> > >
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > --
> > >
> > >
> > >
> > >
> >
> >
> > --
> > Luca Vascon.
> >
> > www.nuovostudio.it
> > www.officinepanottiche.com
> >
>
>
>
>
> ------------------------------------
>
> --
>
>
>
>


-- 
Luca Vascon.
--
www.lucavascon.net
Questa ? la mia mail privata, la guardo di tanto in tanto.
Se volete parlarmi di lavoro, contattatemi attraverso i siti qui sotto.

www.officinepanottiche.com
www.nuovostudio.it

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