X RAW Studio - Need Confirmation About Something...

[DNBush]

I've not been able to get a clear confirmation on this but here's what I think I've discovered...

Let's say you have a recipe that among all the other settings, has DR set to either DR200 or DR400.

Now, if you have some images that were not shot using that recipe, specifically not shot using either DR200 or DR400, it appears that you can't apply, in X RAW Studio, your recipe that does have a non-DR100 setting.

If you do try to, you get what appears to be all the other settings applied but not the DR and you get a rather vague message.

Have I got that right? Is it indeed the case that any recipe that includes a DR setting other than DR100, can only be applied to images that were shot using that specific DR setting?

 

[jaberg]

Correct. You can not apply Fuji’s dynamic range effects after time of capture.

 

[DJF55]

Correct. You can not apply Fuji’s dynamic range effects after time of capture.

Is that the confirmation that DR 200/400 affect the ecposure of the RAW file?

 

[John Bean (UK)]

Think of X-Raw Studio as just a big screen GUI for the cameras built in raw converter. It can't do anything the camera can't do on its own.

 

[DJF55]

Think of X-Raw Studio as just a big screen GUI for the cameras built in raw converter. It can't do anything the camera can't do on its own.

Sorry, but that doesn't really address my point. I know how X-Raw works, just not why not for DR 200/400, which the camera can do on its own.

--
DJF

 

[DNBush]

Think of X-Raw Studio as just a big screen GUI for the cameras built in raw converter. It can't do anything the camera can't do on its own.

Sorry, but that doesn't really address my point. I know how X-Raw works, just not why not for DR 200/400, which the camera can do on its own.

I think John was answering my question, not yours.

 

[DJF55]

Think of X-Raw Studio as just a big screen GUI for the cameras built in raw converter. It can't do anything the camera can't do on its own.

Sorry, but that doesn't really address my point. I know how X-Raw works, just not why not for DR 200/400, which the camera can do on its own.

I think John was answering my question, not yours.

Oh, sorry, don't see who is answered to on my phone. So my point is still not addressed then.

 

[Richard Butler]

Correct. You can not apply Fuji’s dynamic range effects after time of capture.

Is that the confirmation that DR 200/400 affect the ecposure of the RAW file?

You get very into chicken and egg, there.

The easiest way to look at it is: the DR modes change the balance of gain and exposure used.

So at DR100, the camera can go down to its base ISO. DR200 is only available at base ISO + 1 stop (because it's effectively the base level of gain, but one stop less exposure, and hence ISO is rated a stop higher).

At DR400, the lowest you can go is base ISO + two stops, because it's effectively the base level of gain but given two stops less exposure, and hence the ISO is rated two stops higher).

However, while if you're at base ISO, applying DR would involve an exposure reductions, once you're one or two stops above base ISO, you could apply the DR modes without changing exposure: reducing the amount of gain being applied behind the scenes. At one stop above base, you can engage DR200 without changing exposure, and two stops above base, you can engage DR200 or DR400.

So, in post, whether in-camera or in X Raw studio (which is an interface for in-camera reprocessing), you cannot select a higher DR setting than the one shot with at the time of capture, because you can't, after the fact, reduce exposure or gain to find additional highlights: both were fixed at the point you hit the shutter.

You can reprocess a DR400 shot at DR200 or DR100, applying a more abrupt tone curve and throwing away one or two stops, respectively, of highlights.

You can reprocess a DR200 shot down to DR100, throwing away a stop of highlights.

But nothing you can do can change the balance of gain and exposure used at the point of capture, so you can't choose a higher DR setting after the fact.

Richard - DPReview.com

 

[DJF55]

1. Richard Butler wrote:

DJF55 wrote:

Correct. You can not apply Fuji’s dynamic range effects after time of capture.

Is that the confirmation that DR 200/400 affect the ecposure of the RAW file?

You get very into chicken and egg, there.

The easiest way to look at it is: the DR modes change the balance of gain and exposure used.

So at DR100, the camera can go down to its base ISO. DR200 is only available at base ISO + 1 stop (because it's effectively the base level of gain, but one stop less exposure, and hence ISO is rated a stop higher).

At DR400, the lowest you can go is base ISO + two stops, because it's effectively the base level of gain but given two stops less exposure, and hence the ISO is rated two stops higher).

However, while if you're at base ISO, applying DR would involve an exposure reductions, once you're one or two stops above base ISO, you could apply the DR modes without changing exposure: reducing the amount of gain being applied behind the scenes. At one stop above base, you can engage DR200 without changing exposure, and two stops above base, you can engage DR200 or DR400.

So, in post, whether in-camera or in X Raw studio (which is an interface for in-camera reprocessing), you cannot select a higher DR setting than the one shot with at the time of capture, because you can't, after the fact, reduce exposure or gain to find additional highlights: both were fixed at the point you hit the shutter.

You can reprocess a DR400 shot at DR200 or DR100, applying a more abrupt tone curve and throwing away one or two stops, respectively, of highlights.

You can reprocess a DR200 shot down to DR100, throwing away a stop of highlights.

But nothing you can do can change the balance of gain and exposure used at the point of capture, so you can't choose a higher DR setting after the fact.

Richard - DPReview.com

Is that a yes or no to my question "Is that the confirmation that DR 200/400 affect the ecposure of the RAW file?"

Thx.

--
DJF

 

[Richard Butler]

Is that a yes or no to my question "Is that the confirmation that DR 200/400 affect the ecposure of the RAW file?"

It's an explanation that it's not a question with a yes or no answer.

The answer is: it depends (on the circumstances: ie whether you were starting from base ISO and DR100, in which case exposure would be changed, or from above ISO, where exposure might not be changed).

Richard - DPReview.com

 

[DJF55]

1. Richard Butler wrote:

Is that a yes or no to my question "Is that the confirmation that DR 200/400 affect the ecposure of the RAW file?"

It's an explanation that it's not a question with a yes or no answer.

The answer is: it depends (on the circumstances: ie whether you were starting from base ISO and DR100, in which case exposure would be changed, or from above ISO, where exposure might not be changed).

Richard - DPReview.com

Let me put my question differently: shooting Raw @ ISO twice base and DR 200, is the result from an exposure point of view (highlights protected, shadows lighter) the same way as in the Jpeg with the same settings? Or very simply put: does DR 200/400 given the required ISO settings affect the Raw file?

 

[Richard Butler]

Let me put my question differently: shooting Raw @ ISO twice base and DR 200, is the result from an exposure point of view (highlights protected, shadows lighter) the same way as in the Jpeg with the same settings?

I need to check what you mean by exposure. Exposure usually refers to the aperture value and shutter speed and how much light the sensor experienced. How light the shadows are is defined by processing, not exposure.

Or very simply put: does DR 200/400 given the required ISO settings affect the Raw file?

Yes. Let's assume the following two images are given the same exposure (same shutter speed, same aperture):

• If you're at the ISO setting one stop above base at DR100, the camera will apply one stop of analogue gain before the Raw file is created. The brightest stop the sensor originally captured will be pushed into clipping by this amplification and lost.
• If you're at the ISO setting one stop above base at DR200, the camera will use its minimal (base) level of amplification. That brightest stop originally captured is retained in the Raw.

Per my original post, this second Raw can have the DR200 curve (which has an extra stop of rolloff above middle grey, before clipping) applied. Or you can retroactively use the more abrupt DR100 curve, and throw away those extra highlights in post.

The DR100 Raw file does not have the additional highlights to use the DR200 curve. If you could somehow apply it, most of the tones in your image would be rendered a stop too dark.

Hence you can only ever opt to use the DR setting you shot at, or lower, never higher, once the shot has been taken.

Richard - DPReview.com

 

[DJF55]

Let me put my question differently: shooting Raw @ ISO twice base and DR 200, is the result from an exposure point of view (highlights protected, shadows lighter) the same way as in the Jpeg with the same settings?

I need to check what you mean by exposure. Exposure usually refers to the aperture value and shutter speed and how much light the sensor experienced. How light the shadows are is defined by processing, not exposure.

Or very simply put: does DR 200/400 given the required ISO settings affect the Raw file?

Yes.

Good, many thx, that's really all I wanted to know.

Let's assume the following two images are given the same exposure (same shutter speed, same aperture):

• If you're at the ISO setting one stop above base at DR100, the camera will apply one stop of analogue gain before the Raw file is created. The brightest stop the sensor originally captured will be pushed into clipping by this amplification and lost.
• If you're at the ISO setting one stop above base at DR200, the camera will use its minimal (base) level of amplification. That brightest stop originally captured is retained in the Raw.

Per my original post, this second Raw can have the DR200 curve (which has an extra stop of rolloff above middle grey, before clipping) applied. Or you can retroactively use the more abrupt DR100 curve, and throw away those extra highlights in post.

The DR100 Raw file does not have the additional highlights to use the DR200 curve. If you could somehow apply it, most of the tones in your image would be rendered a stop too dark.

Hence you can only ever opt to use the DR setting you shot at, or lower, never higher, once the shot has been taken.

Richard - DPReview.com