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Sony PMW-EX3 Camera Information


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#1 Andrew Sisnett

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Posted 26 November 2008 - 01:12 PM

Hello,

I have just shot half of a short film with a Sony PMW-EX3, and I had not even had a chance to see/touch the camera until the cameraman showed up on our set the day of shooting. Prior, I did attempt some research about the camera but found difficulty determining the PMW-EX3's effective ASA/ISO setting or finding a menu where I can change that.

I am a student cinematographer and perhaps this is an elementary question, but how do I figure this out on these digital cameras? Without knowing my ASA I had some difficulty determining exposure levels on the set I was trying to light and felt like I had my hands tied the entire shoot. With the director and production crew pushing me to hurry up, I had only inconsistent visual references between the EX3 viewfinder and the monitor output to try the lighting setups.

Not knowing the ASA/ISO impeded me greatly on this shoot and I'd like to know how either determine this value on the camera or whether or not I can change it in camera via the menu system.

Any and all help regarding this would be GREATLY appreciated.

Thank you,

Andrew
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#2 Adrian Sierkowski

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Posted 26 November 2008 - 01:15 PM

Andrew, the EXs like most video cameras, don't have a singular ASA/ISO. They will respond differently, a bit, under varying conditions. What I tend to do with my EX1, when I had to rate it, was threw up a grey card, looked at the histogram in the viewfinder, and exposed that illuminated greycard to about 50IRE. I then looked at my meter and changed the ISO until i got it close to the Fstop on my lens. Iirc it was about 250 with -3db on the EX1. should be approx the same on the EX3, but double check.
IT'll change, though based on scene content, but it'll give you a rough idea of where you are illumination wise.
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#3 Andrew Sisnett

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Posted 26 November 2008 - 01:20 PM

Andrew, the EXs like most video cameras, don't have a singular ASA/ISO. They will respond differently, a bit, under varying conditions. What I tend to do with my EX1, when I had to rate it, was threw up a grey card, looked at the histogram in the viewfinder, and exposed that illuminated greycard to about 50IRE. I then looked at my meter and changed the ISO until i got it close to the Fstop on my lens. Iirc it was about 250 with -3db on the EX1. should be approx the same on the EX3, but double check.
IT'll change, though based on scene content, but it'll give you a rough idea of where you are illumination wise.



Great feedback!

I will definitely try this to verify, thank you so much!
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#4 Adam Paul

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Posted 27 November 2008 - 10:01 PM

Andrew, the EXs like most video cameras, don't have a singular ASA/ISO. They will respond differently, a bit, under varying conditions. What I tend to do with my EX1, when I had to rate it, was threw up a grey card, looked at the histogram in the viewfinder, and exposed that illuminated greycard to about 50IRE. I then looked at my meter and changed the ISO until i got it close to the Fstop on my lens. Iirc it was about 250 with -3db on the EX1. should be approx the same on the EX3, but double check.
IT'll change, though based on scene content, but it'll give you a rough idea of where you are illumination wise.


And it will definitely change with the gamma your select. Which gamma did you get 250 ASA with?
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#5 Adrian Sierkowski

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Posted 27 November 2008 - 10:04 PM

A concoction I was messing with for the Letus setup; mostly crushing some blacks down. I believe, though it's been awhile, that it was based off of Cine1 (or 4?).
I Keep meaning to go out and actually run through all the gammas etc with a vectrascope, but no time. For them moment, sadly, camera is locked on "cine 3" for a shoot.

Adam, any idea which of the presets is the best trade off for noise/speed?
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#6 Allan George

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Posted 19 January 2009 - 04:56 AM

Hi guys,

I am shooting on an ex3 and would like to get some new lenses for it, I have been looking at redrock and letus with adapters etc.

I got a little confused when they asked me, "what thread size do the lenses have?" what does this mean.
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#7 Jonathan Bowerbank

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Posted 19 January 2009 - 05:07 AM

I got a little confused when they asked me, "what thread size do the lenses have?" what does this mean.


Since you're referring to 35 adapters, whoever asked you that was probably asking the diameter of the EX3's lens, or filter thread on the front of the lens. The EX3's stock lens' thread is 77mm.

Have you looked at the 2/3" to 1/2" adapter? http://www.bhphotovi...ns_Adapter.html

I'd prefer that to the light loss and loss of sharpness due to 35 adapter.

Edited by Jonathan Bowerbank, 19 January 2009 - 05:08 AM.

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#8 Ram Shani

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Posted 26 January 2009 - 08:46 AM

do you get the same field of view of 2/3 with the adaptor or it stay 1/2"

what about DOF is it of 2/3 or 1/2
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#9 Walter Graff

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Posted 26 January 2009 - 09:10 AM

Andrew, the EXs like most video cameras, don't have a singular ASA/ISO. They will respond differently, a bit, under varying conditions. What I tend to do with my EX1, when I had to rate it, was threw up a grey card, looked at the histogram in the viewfinder, and exposed that illuminated greycard to about 50IRE. I then looked at my meter and changed the ISO until i got it close to the Fstop on my lens. Iirc it was about 250 with -3db on the EX1. should be approx the same on the EX3, but double check.
IT'll change, though based on scene content, but it'll give you a rough idea of where you are illumination wise.


Adrian with another great response!
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#10 Adrian Sierkowski

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Posted 26 January 2009 - 09:14 AM

Thank you Walter.

I must add as well that when it comes to getting the most out of the darks in your image, I recommend giving Cine4 a try in the EX1 Picture profiles. It does add some noise in the blacks, but with -3DB it's not too bad, and it also allows you to bring them-- the blacks-- down in post as well as the noise generated therein if/when needed.
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