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Member Since 28 Mar 2009
Offline Last Active Aug 14 2018 02:58 PM

Posts I've Made

In Topic: The relationship between exposure and sharpness

14 August 2018 - 02:55 PM

Incorrect exposure increases noise and thus affects perceived 'sharpness'. Exposing to the right also, from my testing over many years, is, in effect, often incorrectly exposing the image (or effectively parts of it to be more accurate), and depending on specifics can have a similar effect to incorrect exposure in that noise levels can marginally increase in some areas. I am an advocate in shooting 'within latitude' and this 'latitude' needs to be assessed for each camera - some have greater 'latitude' in terms of exposure than others. All that said, choice of apertures, movement (even with flash/strobe illumination at times) and precise point of focus are usually more significant. 


Paul, underexposing does not in itself cause noise; only trying to correct that in postprocessing does (by amplifying shadow noise in underexposed areas). Maybe it's a semantic difference, but I feel it's an important one.

I am not sure what you mean about "shooting to the right incorrectly exposes an image". If you shoot to the right taking care to not blow out any highlights, you are maximally using (getting the highest possible signal to noise ratio from) your digital sensor. You can of course decrease the exposure in postprocessing a bit, without adding any noise.

In general, sharpness is not a function of exposure, within a wide range of reasonable parameters.




In Topic: The relationship between exposure and sharpness

09 August 2018 - 05:21 PM

I agree with many that there is no strong correlation between proper exposure and "sharpness". One setting that does pop out to me that will affect the resolving power of your system is "f/20". Except for the finest macro lenses, and even then sometimes, you will start to see diffraction-limited decrease in resolving power as you head smaller than f/16.


In general, I find the things that limit my sharpness are focus accuracy and subject movement. Proper exposure affects other things but not sharpness. Shoot RAW, expose to the right, and all will be good.




In Topic: Anyone already using the RX100VI in the new Nauticam housing?

09 August 2018 - 05:01 PM

I have the Mark V. I don't intend to upgrade. The issue is that big ol' strange port that will destroy compatibility with the WWL-1 and CMC-2 lenses I have.  For underwater I think that the extra zoom isn't the right answer, and it's better to get the enhanced Mark V.




In Topic: Nauticam WWL-1 questions

09 August 2018 - 04:59 PM

I just got one to use with a Sony RX100-V (Nauticam housing obviously). It's a beast. It's like four pounds of glass. For a trip to Cozumel, for the types of things that like to shoot, it was just TOO wide angle; I kept finding myself trying to zoom more. Optically it performs magnificently. I am sure that there will be situations where it will be amazing. I look forward to exploring its uses when I can slow down and compose wide angle shots and video better.

In Topic: Sony NEX-5N in Aquatica Housing with Sola 600 Focus light: $1000

23 June 2018 - 07:16 AM

Hi mate, I sent you an e mail! Let me know if you didn't get it:)


I did not. I just sent you a PM with my email address.