Sony a7S III, FX3 Low Light Dual ISO EXPLAINED, How to Find It

Описание: It's well known that the Sony a7S III and its related cinema camera sibling, the FX3, are exceptional performers in terms of low light and capturing crisp images in the darkest of dimly-lit scenes.  This is no surprise given these cameras have a maximum extended ISO of 409,600.  However, one of the largest additional reasons the a7S III/FX3 performs as well as it does in low light is ultimately due to its not as widely publicized dual gain ISO.

This is not quite a "dual native" ISO, in that noise performance at this second ISO value is not as clean as it is at its base ISO.  However, it provides two values (a base, and high value) with each gamma curve in the camera that noise performance and the image quality looks and performs at its best.  Thus, enabling you to still get a great looking image even in extremely dark scenes.

I'll first discuss the two key things to look for when identifying the base ISO of any gamma curve in the camera (e.g. Cine4, HLG, S-Cinetone, S-Log3).  Following this, I'll discuss the two methods you can utilize to identify the second, higher clean ISO value.  It is worth noting that these ISO numbers will vary per gamma curve/picture profile used in the camera.  Thus, it's more critical to remember the means by which you can find these, rather than to necessarily memorize any specific numbers, as these won't be universally applicable.

Let me know if technical tips and tricks with Sony mirrorless cameras like my a7S III are helpful, and I will try to make more!

Sony a7S III: https://amzn.to/3Gd87kK

0:00 - Intro, and why a dual gain ISO is useful/important
1:01 - The two ways to find the base ISO
1:30 - An important point about these dual ISO numbers...
1:55 - The first way to find the higher dual gain ISO (x20)
2:41 - The second way to find the higher dual gain ISO (+4.33 stops/13 steps)
3:44 - Conclusion

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My Current Kit:
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Cameras & Lenses:
Sony a7S III: https://amzn.to/3Gd87kK
Sony a7 IV: https://amzn.to/3g3Ipoq
Sony a7 III: https://amzn.to/3GcEX5x
Sony 20mm f/1.8 G: https://amzn.to/3AE7pMt
Sony Zeiss Sonnar 55mm f/1.8: https://amzn.to/3r6Lo5M
Sony 24-70 f/2.8 GM: https://amzn.to/3HfLIoy
Sony 70-200 f/2.8 GM: https://amzn.to/3He70Ts

Audio:
Rode VideoMic NTG: https://amzn.to/3AJwTrW
Tascam DR-10L: https://amzn.to/3AIRA7l
Zoom H6: https://amzn.to/32HCgep

Lighting:
Aputure LS 60x: https://amzn.to/3Gc04og
Aputure Amaran P60c: https://amzn.to/3ob7qm6
Aputure Amaran AL-F7: https://amzn.to/3g3IzMy
Aputure MC: https://amzn.to/34l8DzS

Tripod/Monopod:
Manfrotto 290 Xtra 128RC: https://amzn.to/3o8bPpV
iFootage Cobra C180-II: https://amzn.to/3r8kfPY

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