pdk42
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So does the Panasonic 14-28.
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The 14-28 or two S14 + S28 f/1.8?
- Thread starter ermesjo
- Start date
CharlesH
LMF-Patron Gold
You people are bad. All this talk about the 14-28 and I'm starting to get interested in it.
ermesjo
New Member
Hello Dag. The S5ii/x has dual base/native ISO. In V-Log profile they are 640 and 4000. If the scene is very dark you can jump to 4000 ISO and the results are very good. If you want to see how exactly that works, I found a comment online very interesting about it from someone called "_cdcam" (I do copy and paste):
"Dual native ISO is a feature that's most commonly found on cinema cameras as it's mostly useful for video.
The setting in question doesn't have anything to do with picture profile or really even the ISO setting itself. This setting applies to the two available gain circuits within the sensor that amplify the signal being received. One low and one high. The way that the ISO and picture profile apply to this is there is a specific iso either high or low that creates the highest dynamic range depending on what picture profile you're using (V-Log, CineD, HLG, etc) I wish that this setting was implemented in the same way as they did on the Varicam 35 and LT as I think that is easiest to understand but the principle is the same. Keep in mind raw shooting is a different approach than using baked in color and settings as you would when recording internally. So the way ISO setting works is that gain is added digitally as you increase from the base ISO, on a non-dual ISO camera, this would just increase continuously as you increase the ISO. On a camera like the S5 II there is a second base ISO with a higher gain that drops the noise floor back to almost zero and then increases from there. Any ISO setting besides the two "native" ISO's is a digital manipulation similar to just increasing the exposure setting in post.
The benefit of being able to choose your high or low gain is control. This is especially important as you are recording with a baked in image profile and grain. You can use this control to manipulate an exchange of dynamic range vs noise. For instance, say you need to record at much higher ISO than the lower base iso because of limited light (for our purposes let's assume V-Log), correct exposure is 2500 ISO. On a single ISO sensor you would be pushing that signal pretty hard resulting in a lot of noise and a large loss in dynamic range, but on the S5 II you have a second ISO at 4000 which almost resets your noise and dynamic range (note: the dynamic range and noise are still worse at the second iso just less than they normally would be.) You might be saying well if I use ISO 4000 then my image is overexposed, but this is where a really nice function of Dual ISO comes in; if you set your ISO to high but choose a lower than native ISO like 2500 you get less grain at the cost of slightly reduced dynamic range. You can get a really clean image by using the high gain sensor but rating at a lower ISO, this would be like lowering the exposure in post which would effectively hide the grain in the image. Alternatively if you had a very dynamic scene and wanted to retain that range you could just ND one stop and though you have a little more grain you'd have some more range in post. This is why it's nice to be able to choose which ISO (high/low) you're using, it's just another way to control your image. Some cinematographers have been known to use the higher ISO even in daylight and ND back down because they like the grain and light control but want to keep dynamic range for an organic feel. Auto setting will probably be fine for the majority of use cases just FYI but the option to control it is there.
I think calling it Dual ISO is kind of confusing as the ISO is actually variable and not even the relelavent term but it's pretty commonplace now. On the Varicam pressing the ISO button lets you choose the native ISO you want which is always the same since there is only one color profile and the choose independently which ISO you want to shoot at which I think is a lot more user friendly".
In the site "cined.com" they test the rolling shutter, dynamic range and latitude of the cine and "decent enough" video cameras. Here is the test of the S5ii:
Panasonic LUMIX S5 II Lab Test - Rolling Shutter, Dynamic Range and Latitude | CineD
Panasonic LUMIX S5 II Lab Test - testing rolling shutter, dynamic range and exposure latitude for 4K and 5.9K V-Log.www.cined.com
A very technically explanation, but if I understand the essence of it - dual native ISO - in 2025 the technology have made such progress that grain and "muddy" pictures (video) is no longer the obstacle that it used to be. Take into consideration the $$$-factor, which we as "prosumer" customers would be nicknamed, a zoom with an 4-5.6 aperture would be a better choice. Of course, we can opt for shallow of depth with a 1.8 lens, but then you you loose the quick flexibility with zooming (crammed spaces, etc.). Another question, that I will post separately in another thread, is the optical quality when comparing Lumix S 14-28 to my old Canon EF 17-40 f/4.0. What I can see, is that the Canon isn't that sharp (anymore). What we considered sharp in the 2000's isn't sharp enough in 2025.
Progresjon
Member
ermesjo
New Member
Thank you. Can I ask you to remind me in due time. Will your post mean that you plan to sell one of them ? I am still evaluating pluss that I am stuffing up my bank account
Will see if I am landing on the one or other leg... but not both. Regards, DagProgresjon
Member
Not selling either, they both have a place in my kit. Just wanted to give you the chance to try them on your kit with your shootingstyle to eliminate guesswork for you, since I have them and is located in fairly close proximity to you.Thank you. Can I ask you to remind me in due time. Will your post mean that you plan to sell one of them ? I am still evaluating pluss that I am stuffing up my bank account