First XF1 photos

Started Aug 2, 2013 | Photos thread
OP Wellington100 Forum Pro • Posts: 11,276
Re: Great comparison M vs L

davidge wrote:

CAcreeks wrote:

I think the M size (KimL) is far nicer than the L size (Dave). It could be entirely a matter of exposure. Weird, but the L size is overexposed by more than 1 EV (6.6 vs 7.8). Don't know how that happened. Also don't know why ISO 400 was selected for M size (bit of noise at pixel level). I feel your Silkypix raw conversion comes in a close second to the M size DR 400. Thanks for posting!

My understanding from reading elsewhere on DPR is that because the M size is ISO 400 DR400%, the 'clever' EXR processing would not be performed in this case (i.e. splitting the sensor to expose highlights and mid/shadows separately then combining to produce the final image) as that only happens when ISO is less that DR.

That is true but Auto ISO will lower the ISO in good light so its not an issue. If you don't set Auto ISO 400 then you preclude the camera using the 320 ISO setting which is the highest ISO it can use for the above mentioned trickery.

Dave uses Auto ISO 200 so the camera is always in the zone on that side of things, but 800% DR has the same effect as 400 ISO in that it stops the EXR processing.

The way to guarantee EXR processing every time is to use Auto ISO 200 and Auto DR 400 but of course those are good light settings only. Perhaps an optimised good light setting and a low light setting would be a good use for C1 and C2. I might have a go at that.

Any suggestions for an optimised low light setting would be appreciated, would increasing NR for example be a good idea?

When they are the same (or ISO>DR?) then the same processing happens as for L size DR - i.e. underexposure of the whole frame to preserve highlights with tone curve adjustement to raise the shadows and mids. So in theory the only differences between the two are the overall exposure value and the M size discarding pixels. The M size one looks sharper because the L size one is not in focus or is suffering from camera shake - look at the writing on wine glass or bottle at full size.

This EXR stuff can be damn confusing!

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