A7s and GH4 vs. Arri Amira? Really? Dynamic Range Compared

by Hugh Brownstone4 Comments

Panasonic's GH4 is supposed to have great dynamic range, but at least in this test from our friends over at Cinema5D, the Sony A7s mops the floor with it, coming in at 14.1 stops vs. just 10.9 stops for the GH4 (and 11.8 stops for the Canon 5D Mk III) .

The Sony's performance is less than half a stop off that of the Arri Amira, a $40,000 camera.


Differences in testing protocols means YMMV (your mileage may vary). Paradoxically, DxOMark reports a better result at 12.8 stops for the GH4; a worse result for the A7s at 13.2 stops; and an almost identical 11.7 stops for the 5D Mk III.


Do we need to wait one more generation of cameras before we can have it all?  Can anyone offer additional insight?

Dynamic Range – Sony A7S vs. the others

This is a dynamic range test and comparison between the Sony A7S, Arri Amira, Panasonic GH4, Canon C300, Canon 5D mark III and Canon 1D C.

The dynamic range is the range in luminance any given camera can capture. More range allows for more flexibility in post production and usually provides a more natural and hence more cinematic end result.

Johnnie Behiri reviewed the A7S and found numerous points that make it a candidate to replace our all time favourite, the Canon 5D mark III (see full review here).

Some of the strengths include not only lowlight performance, but also the high resolution OLED viewfinder, a strong cinematic picture, full-frame coverage, ease of operability, 50p mode, crop-mode and more.

In this first scientific test in a series that we will publish over the next weeks, we want to take a look at the aforementioned dynamic range in comparison to several other very important cameras.

Let’s take a look at the results first:

Dynamic Range – Sony A7S vs. the others


Here we tested usable dynamic range of the given cameras. With 14.1 stops the usable dynamic range of the A7S comes surprisingly close to the Arri Amira with its legendary Alexa sensor (see our full review here).

This is an extremely good dynamic range rating and is fascinating considering that the A7S is available at a fraction of the Amira’s price and is also in a completely different weight and size class. While the Amira will outperform the A7S in other tests, the dynamic range is a very important attribute to consider when working with a camera.

The Canon cameras come in at 11-12 stops of usable dynamic range. This is still a very strong dynamic range rating, but in comparison to the A7S the Canon’s are way behind.

The Panasonic GH4 had the worst dynamic range in our test. This is in line with the rather videoish look and contrasty colors we can subjectively observe.

Read further on cinema5D's test results – “Dynamic Range – Sony A7S vs. the others.”

Note: it is our policy to give credit as well as deserved traffic to our news sources – so we don't repost the entire article – sorry, I know you want the juicy bits, but I feel it is only fair that their site get the traffic and besides, you just might make a new friend and find an advertiser that has something you've never seen before

(cover photo credit: snap from cinema5D)


  1. Pingback: Interesante comparativa sobre el Rango Dinámico | CINENIC Noticias

  2. Interesting to point out that the BMCC is at 13 or 13.5 stops and has been touted as a “mini Alexa” for that reason.

  3. Pingback: Écart dynamique : comparaison de caméras DSLR | Veille technopédagogique au CCDMD

Leave a Comment