Jump to content

M10 Dynamic Range tests


digitalfx

Recommended Posts

Can anyone explain to a simpleton like me, what and how they are measuring. I just read numbers and a graph and have to believe them.

 

If the graph for the M10 is right, it shows max. dynamic range at ISO 100. Is this a proof that ISO 100 is the base and no "pulled" ISO-value, or is it just another assumption?

Link to post
Share on other sites

Can anyone explain to a simpleton like me, what and how they are measuring. I just read numbers and a graph and have to believe them.

 

If the graph for the M10 is right, it shows max. dynamic range at ISO 100. Is this a proof that ISO 100 is the base and no "pulled" ISO-value, or is it just another assumption?

 

 

Read his previous info on the SL here:

https://www.dpreview.com/forums/thread/4124741

 

bottom line ISO 100 has the most DR, although ISO 200 is right there.

Link to post
Share on other sites

Well, with dynamic range one measures the span between highlight clippng (100% activated pixels) and all detail vanishing into the noise floor in the shadows.

 

More interesting is exposure latitude which takes the rolloff of the graph on the extremes into consideration. As an example, a sensor can keep the graph flat just above the noise floor, but not produce usable detail in the shadows. In that case the exposure latitude is much less than the dynamic range.

 

Exposure latitude is always less than dynamic range, by a variable amount

Dynamic range is an objectively measurable number of interest to technogeeks, exposure latitude a more subjective value of interest to photographers.

 

In daily use the two parameters are usually confused and mixed up.

Link to post
Share on other sites

Can anyone explain to a simpleton like me, what and how they are measuring. I just read numbers and a graph and have to believe them.

 

If the graph for the M10 is right, it shows max. dynamic range at ISO 100. Is this a proof that ISO 100 is the base and no "pulled" ISO-value, or is it just another assumption?

it means that ISO 100 isn't simply a pull ISO, but likely the M10 sensor like SL sensor has two base ISOs 100 and 200, so you can't really say either is base ISO. What it does mean is the you can use ISO 100 without worrying about a DR penalty, but you don't get a full stop gain in ISO 100 over 200 either. ISO 100 has about a half of stop better DR, but that won't be very noticeable or useable in most situations and we will have to learn in practice how each performs in various situations. There may be some situations in which ISO 200 performs better than ISO 100, but there won't be huge differences either way.

Link to post
Share on other sites

To a total layperson the curves look like they're essentially all on top of one another... in practice are the differences they imply noticeable?

 

 

Sent from my iPhone using Tapatalk

Compare the M10 to the Canon 5D MKIII and you will notice how much better the M10 is at low ISO. Note that the Canon 5D MKiV is very similar to the M10. So, yes when the curves are on top of each other the performance is similar, but the differences are in stops, so you can figure out how similar they are. Difference less than a stop I find are hard to notice.

Link to post
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...