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PostPosted: Mon Mar 10, 2014 11:05 am 
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Joined: Tue Aug 06, 2013 9:20 am
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Hi, going through the usual "where do I compromise" debate on a pocket camera. Cameralabs website great in terms of comparing each camera with immediate peers, but I am struggling to compare with a wider selection. I know the theory will say bigger sensor, better performance, but what is the reality?

So, putting aside handling, longer lens etc, and just looking at Resolution & Noise, how does the Stylus 1 compare against other compacts with a 1/1.7" sensor, eg LF1, S120, G16 and the like. And if Stylus 1 is tops of 1/1.7", is it still well behind RX100ii?


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PostPosted: Thu Mar 13, 2014 7:38 am 
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Joined: Wed Apr 08, 2009 2:29 am
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Given that you say "putting aside ... longer lens", you can probably substitute the RX10 for the RX100 since they have the same size sensor. Just make sure to factor in the different max apertures since they will affect low light noise.

Similarly, between the 1/1.7" sensors, the max apertures of the lenses will impact low light noise. So it depends on what you shoot. i.e. how fast/bright a lens do you need at what focal lengths?

Pick the camera/lens combo that best fits those needs - Mark


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PostPosted: Fri Mar 14, 2014 12:14 pm 
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Thanks, this seems a good way into it. So, based on the review of Stylus 1 vs RX10, the RX100ii would have the edge if similar to RX10. Interestingly FZ200 with it's 1/2.3" sensor also seems close, I guess this is where the lens quality and processing also influence.

I've also looked at max aperature vs focal length for the 1/1.7" sensor cameras as you suggest. I have had to assume a linear relationship as I only have data for max and min focal length apertures. This suggests that LF1 can only sustain a max aperture of f2.8 up to 64mm, and the S120 up to 50mm, so beyond these focal lengths I'd need to bump up the ISO to match the Stylus 1 which is f2.8 throughout. RX100ii also passes f2.8 around 50mm, but obviously can fall back on larger sensor to counteract higher ISO. Something like a GM1 with kit lens cannot match f2.8 at all, but sensor is larger still.

Does this all make sense vs what you meant? If anyone has more detail around how max aperture moves with focal length for these cameras, let me know.


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PostPosted: Sun Mar 16, 2014 3:05 am 
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Joined: Wed Apr 08, 2009 2:29 am
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Quote:
Does this all make sense vs what you meant?

Yup. You got it almost exactly. Just one thing...

Quote:
I have had to assume a linear relationship...

In my experience, the relationship is not usually linear. Generally, it's more logarithmic. (i.e. maximum aperture usually drops off more quickly as you start to zoom in from the widest focal length and then levels off as you reach the longer end.) Unfortunately, I don't know of a formula that works for all lenses. But if it helps, my RX100 (original) goes from f2.8 to f3.2 at around 40mm (full frame equivalent, 15mm actual, 1.5X zoom power).

Mark

P.S. re: "a GM1 with kit lens cannot match f2.8 at all" -- true, with the kit lens, as you said. But the strength of an interchangeable lens camera is that there are other m4/3 lenses that can match or even exceed f2.8


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