GH3 Dual Head tripod or mount for comparing cameras(GH3 and GH2)

M

mpgxsvcd

Veteran
I want to get a dual head tripod or perhaps a wearable mount to compare the GH3 to the GH2 with when I get it. I would like to film the exact same thing side by side with the two cameras. So is there anything that won't break the bank(<$200) that will support two cameras and perhaps be mobile?

Also I will have to get the exact same lens for both cameras. I currently don't have any duplicate lenses. I guess I need to know what the least expensive lens would be to buy a duplicate of for testing. Or would it suffice to use something like the 25mm F1.4 at the same aperture and focal length as one of the zoom lenses?
 
My first thought was simply a piece of wood with some mounting holes drilled in it.

The 20mm 1.7 Pancake seems a popular lens, and is relatively affordable.
 
Mount it above the other with a shoe mount.

But I really think you are over-thinking on this one.

Why throw away good money for a simple camera test?

Just use the same lens and change out the cameras on the same tripod/head position.
 
I plan on testing everything for these two cameras. One of the things I want to test is how well they track moving subjects and how well they AFC for subjects moving towards and away from them.

I know that I could just swap the cameras out on a single head mount and try to duplicate the subjects motion for both shoots. However, I want to keep the motion identical.

I have narrowed my search down to something like what Blue Bomber posted or a simple hot shoe to camera mount.

I don’t want to make something because I want it to be sturdy but not heavy. I don’t really have the tools or space to do it properly myself. Plus I think I can buy it for about $45-$65. I couldn’t make it for much less than that when you consider time spent as a factor.
 
Maybe I'm missing the whole point behind this test?

You already have the GH2, and by now I assume you know it's capabilities.

Do you really need a side by side at the same time comparison to be able to tell any difference between the GH2 and the GH3?
 
David W. Jones said:
Maybe I'm missing the whole point behind this test?

You already have the GH2, and by now I assume you know it's capabilities.

Do you really need a side by side at the same time comparison to be able to tell any difference between the GH2 and the GH3?
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Yes absolutely the test would be beneficial to some people. I am already committed to buying the camera. However, a lot of other people are not committed yet. There are a lot of great tests and reviews out there but they simply can't cover everything. The tests I plan on doing will fill in those gaps. You really can't judge AFC performance during videos of a moving subject without seeing a direct side by side comparison.

I need to figure out what lens I should buy a duplicate of though? I guess it will have to be the 14mm F2.5 since I already have that lens and it is inexpensive. Anyone in the Raleigh NC area have m4/3s lenses they would be willing to lend for the test?
 
If you're shooting a subject with a 14mm lens you probably aren't going to experience a lot of focus adjustments unless the subject is getting right up in your face and then walks way off in the distance.
 
Chris Adler said:
If you're shooting a subject with a 14mm lens you probably aren't going to experience a lot of focus adjustments unless the subject is getting right up in your face and then walks way off in the distance.
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Yes I have been thinking about that. Not sure exactly what lens I am going to use. I would love to put the 35-100mm F2.8 on both of them. Although I definitely don't have the funds to buy a spare of that lens.
 
@mpgxsvcd I think the most important thing is that the two lenses be exactly the same model - not equivalents. Everything else is secondary (and your funds and preference should be primary). Personally, I would probably opt for the 20mm f/1.7 as opposed to the 14mm f/2.5 so that the AF-C had to deal with shallower DOF, but if you already have the 14mm then go for that.

Either way, always glad to hear when you are creating new settings or doing testing. :)
 
Per Lichtman said:
@mpgxsvcd I think the most important thing is that the two lenses be exactly the same model - not equivalents. Everything else is secondary (and your funds and preference should be primary). Personally, I would probably opt for the 20mm f/1.7 as opposed to the 14mm f/2.5 so that the AF-C had to deal with shallower DOF, but if you already have the 14mm then go for that.

Either way, always glad to hear when you are creating new settings or doing testing. :)
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Yes I totally agree with you. I am starting to rethink this particular test. I don’t know that I can do it justice without spending a ton of money just for this one test.

I want to test the autofocus of moving subjects in a real world example. I can mount the cameras just fine. However, I don’t know that I can afford to get the duplicate lens. The 20mm would not be too hard to get two copies of. However, its auto focus is horrendous on any camera.

I really would need a second 25mm F1.4 and that really just isn’t practical. I will have to find another way to do it.
 
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