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Re: Sigma fp

Re: Sigma fp


Pekka Riikonen
 

There's been some tests with Sigma fp.  Almost a year ago Evin Grant did the 2020 large format camera shootout (blind) where he put Sigma fp among all the heavy hitters like Alexa LF, Red Monstro and Sony Venice, etc.  It was quite brutal (https://vimeo.com/388857434).  Sigma fp just wasn't ready yet, the firmware had bugs and the color was off.  Those issues were fixed subsequently.  I've noticed that in every big firmware upgrade they've also re-profiled the camera, which is a sign they're still improving it.  Recently I saw this review (in spanish) that also matched it with Alexa: https://youtu.be/aSBgrd-YFV4?t=1222

As far as the dynamic range goes, Sigma claims 12.5 stops and it is around 12 stops.  Sigma says that ISO 800 has about 6 stops above middle grey and about 6.5 stops below.  It's dual ISO and ISO 3200 is cleaner than ISO 1600 as a result.

I'm not going to repeat the issues the camera has but one issue that's good to know if you shoot raw with this camera is that the latest 2.0 firmware has a bug where the color mode OFF setting affects also the cDNG raw files even though the color modes are not supposed to.  I reported this to Sigma but they indicated that this is intentional.  So if you shoot raw set the color mode to any other value except OFF, and if you do set it to OFF, keep it OFF in all shots or you'll have color mismatches shot to shot.

I'll add that Sigma fp is great as a webcam.  It doesn't require any additional hardware or software.  Just plug-in the USB cable and the camera appears as any other webcam and will work out of the box with Zoom for example.

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Pekka Riikonen
Helsinki, Finland

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