Dragon vs Alexa

Gunnleik Groven har gjort egne tester og også i samarbeid med Geoff Boyle ( cml) på oppløsning av Dragon  sammenlignet med Alexa. Han har samlet ulike testresultater i  høy oppløsning og har også noen betrakninger rundt hvor høy oppløsning teller og hvor det ikke er så viktig.  Alle testene kan sees  , på han egen blogg. her finner du også mye morro for geeks like him

Følgende er tatt fra hans blog;

To me, an image can technically be broken down to these aspects:

  • Dynamic range
  • Color cleanness
  • Color fidelity/Saturation
  • Resolution
  • Delivery formatAnd as a final parameter:
  • Is the camera available? (!)

All these aspects of an image/camera are part of the matrix that makes us choose one over another for a particular production.
After these (to me) these more emotional points come in:

  • Ease of use on set
  • If it works well for the shot I want to get
  • Price of use (Total, including on-set and post)
  • If I “like it”
  • If it works well with “other” technical parts of the production (like sound and post)
  • Workflow in post and confidence that I get the desired result
  • If it “feels” good
  • Confidence at customer-level

Does resolution matter?

Clipped highlights and unusable lowlights suck. And if you cannot control those, resolution probably takes a diminutive order.
Still, from what we have just seen, even at 1080 delivered and oversampled source-images from both cameras, the higher captured resolution, gives the higher resulting resolution.
So I guess we could conclude:

  • If you can control exposure, originating resolution matters quite  a bit.

Next… When does not in-camera resolution matter that much (soft images scale after all better than sharp images, as a reference to my “Frozen” experience)

  • Resolution does not matter a lot if most of your image is soft

Ouch… That sounds obvious, right?
BUT given the (past) trend of shooting S35mm at T1.3, that actually is a valid point.
When shooting at low aperture, whatever is sharp in the image will appear comparatively sharp, no matter which camera you shoot with.
And the out-of-focus part of the image will inevitably camouflage whatever lack of resolution there is.

I would to some extent argue that the “I shoot everything at T 1.3″ trend is somewhat related to what the cameras are capable of capturing. Lower resolution cameras simply “look better” when a lot of the image is out of focus. (And it is a cost-effective way to compose and clean up shots…)

Lack of resolution becomes distracting when you have a high level of detail in a shot and that is important, and if you get a high level of moire and softness as consequence of camera ability.
Now which shots are these?

To give a general idea, that would be wide shots with tons of important info at higher T-stops.

But that sounds so unfilmic, does it not?

Not really…


  • The fighting sequence of RAN (Akira Kurosawa)
  • Anything but the T 0.9 shots by Stanley Kubrick
  • Whatever in “The Dark Knight”
  • The Godfather
  • Anything by Jaques Tati (Thanks Brice!)
  • Acopalypse now
  • Star Wars IV-VI
  • Kinda most of the “classics”

Low T-stops does not equal “filmic” IMHO.
And: With higher T-stops, you need the detail.

The most frequently quoted arguments for high resolution I see are these:

  • Re-framing and stabilisation
  • VFX/Compositing
  • Oversampling to lower formats (like I looked at in the previous chapters)
  • Reduced noise in delivery-image
  • If you need to pull print-size stills from the film-sourced material (Yup, people, including me actually do that…)
Dragon vs Alexa