Low Light Gh1 Vs Dvx100a

S

Slice

Well-known member
Which is better in low light.

GH1 - using the auto-focus kit lens with the highest iso settings

DVX-100a - using iris wide open


This question is relating to event work. Auto-focus and low light ability is a must have combo.
 
the DVX with zero dB gain is about 1 stop better in lowlight than the GH1 w/ stock lens at it's highest ISO.
 
DVX at 24p

ISO = 640 (with 0dB gain)
lens = 2.8 (for full range)


GH1

max ISO = 1600
lens = 5.8 (for full range)


the DVX's lens is slightly over 2 stops brighter than the GH1's stock lens.... but the GH1's ISO is only slightly over 1 stop better than the DVX... do the math man! :)
 
That's not factual math. Rating a DVX @ 640 isn't the same as rating a GH-1 @ 1600.

The DVX's ISO ratings are "theoretical" ratings if I remember right. So are the HVX200 and HPX170s.

The only way to tell is by definitive means, an actual comparison.

Also, an ISO rating doesn't dictate which is the better performance in low light. Again, if the DVX is faster it could be noisier, or vice versa.

Testing and comparing in a scientific environment is the only way to know.
 
I haven't tested the GH1, but I have tested the 5d mark II. Your math claims that the lowlight capability of the 5d with those same specs would be the same as the DVX.

Very flawed math.
 
Exactly. It's not even the same sort of measurement for either.

When Barry gets a GH-1 or someone who's more apt to do scientific comparisons you'll know, but until then nobody knows.

In my opinion I haven't seen lowlight like this in ANY prosumer camera.
 
I've shot some low light for a short movie with the DVX100 some years ago, and there is absolutely NO comparison with GH1 -from the footage I can see on the internet-. You can easily see noise on the DVX100, while you hardly notice it on GH1, even in very low light...
 
that DVX's ISO rating is straight from barry green... and i think we all rate ISO by shooting a grey card with a spot meter. and then placing it at 50IRE with the camera and a wavelength monitor and seeing what the result is.... of course gamma curves and such effect the result. but that just really messes with where you place 50IRE in the dynamic range of the sensor...

and if Hunter's dynamic range tests of the GH1 are correct. they have the same range above 50IRE (3 stops) and the DVX has about 1 stop more room in the shadows.

so really an actual comparison might be even more favorable to the DVX :)
 
That can't be right.

To start with the comparizon has to be made between cameras.

If both are set a give ISO and the same f stop the results should be the same.

The advantage of a dSLR is that you can use a higher ISO
 
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Yeah I highly doubt it myself.

Numbers can always be spouted but the only tell tale will be side-by-side.
 
the DVX and GH1 have about the same DR and place 50IRE at the same point...

it's just ISO and Fstops... what's so hard to believe???
 
I believe that most people are buying the lens is because there no option for camera only.

Panasonic is forcing buyers to get the package because there is no other option in the market at this time for manual dSLR video camera.
 
Also - am I wrong in assuming that a much bigger sensor makes it more light sensitive? I don't know the science behind what makes it light sensitive, but the thought that there is a larger sensor grabbing information makes me think this argument was flawed from the get go.
 
ryan: the GH1 has also more pixels in the sensor, so that reduce light sensitivity.
But in the end, GH1 still win (clearly).
 
divide said:
ryan: the GH1 has also more pixels in the sensor, so that reduce light sensitivity.
But in the end, GH1 still win (clearly).
Click to expand...
Yeah but that applies only if you take apples to apples in regard to sensor size. Meaning...the sensor is a heck of a lot bigger in the GH-1. If it were the same size as the DVX...then you could see a problem with it having more pixels. Also....I think the actual size of the pixels come into play.
 
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