How are you rating the Helium Sensor

[steve green]

Curious to see how the smart guys are rating the sensor. Do you change your iso based on day exterior/interior or night exterior/interior? For instance, go outside and rate at 320, and watch the clipping like a hawk......have a dark scene and rate at 1280 and watch the noise carefully? Or, is the inverse the better way to go? With the Dragon I would rate it at 800 most of the time, but was never afraid to go to 320 for an exterior. All input is appreciated.

 

[Phil Holland]

I do this as my basis:

From there if I want a cleaner image I shoot about a stop lower on those recommended ISO ratings. Sometimes more.

If I want crazy highlight retention, more image texture, or shooting in low light I go the other way.

 

[Joel Voelker]

I don't mind the finer and less chromatic noise at 8k. I rate 1000 on the kippertie OLPFs and recently had to push as high as 3200 on the standard OLPF for a shoot in a subway station (granted the location and subject accepted a little more grit than other shoots) - I was honestly blown away to have useable 3200 ISO footage. This sensor is incredible. I'm looking forward to shooting on it a lot more to see what it can do.

 

[steve green]

Thanks for the chart Phil, your tools are always so helpful.

 

[Sean Keen]

Thanks again Phil, awaiting your ND's and some other filter tests

 

[Björn Benckert]

To me helium looks its best when transcoding around 3200iso.
But when doing so its still important that no pixels are exposed back or over exposed. So a nice histogram at 3200 iso and no goal posts is my recommendation to a nice cinematic feel with a beautiful texture for 4k.

Now I dont really like pictures to be like glass so for HD im not to worried to bump iso to 6400 on helium. Again I try to keep lowlights and highlights within the scope of the DR and I rather change exposure than clip at any side. So if thats needed thats what I do and add grain in post to match the base exposure.

 

[Mark L. Pederson]

1280 all day.

 

[steve green]

1280 all day.

Mark, you'll rate at 1280 for day exteriors/interior with lots of light to protect the highlights?

 

[steve green]

To me helium looks its best when transcoding around 3200iso.
But when doing so its still important that no pixels are exposed back or over exposed. So a nice histogram at 3200 iso and no goal posts is my recommendation to a nice cinematic feel with a beautiful texture for 4k.

Now I dont really like pictures to be like glass so for HD im not to worried to bump iso to 6400 on helium. Again I try to keep lowlights and highlights within the scope of the DR and I rather change exposure than clip at any side. So if thats needed thats what I do and add grain in post to match the base exposure.

Bjorn, I know you do a lot of post and have lots of hands on experience.....that seems to be very aggressive to rate at 3200. Do you do that even with lots of light?

 

[Olivier Gresse]

1280 for standard OLPF ?

And with the STHO or the LLO ?

 

[Christoph Tilley]

I always shoot at 1280 and have great experiences with the motion mount when shooting at daylight.

 

[Joel Arvidsson]

1280 for standard OLPF ?

And with the STHO or the LLO ?

For Helium
1280-2500 for the standard olpf and the same for the llo.
640-1000 for the stho based on Phils notes.