On the primacy of exposure

Started 6 months ago | Discussions thread
Mako2011
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Re: Fun
In reply to Bobn2, 6 months ago

bobn2 wrote:

Mako2011 wrote:

bobn2 wrote:

Mako2011 wrote:

bobn2 wrote:


The processing algorithms are the same, apart from the post processing steps for colour adjustment and resampling. The point though is, with 5 stops difference of exposure, given that exposure is so important, it should be possible to pick them, whether or not the processing is the same. In different processing can compensate for different exposures, there is no point worrying too much about exposure, or is there?

How did you adjust the exposures? Shutter speed (deciding if shadow noise may give a clue)? If color adjustment was needed, perhaps that points to why exposure might be important.

The EV is as stated and shutter is less than 1/250 in all cases, so no long shutter speed effects.

Again, how did you alter exposure in the original images? That plays into it greatly.

The normal way, I changed the EV settings (which are the shutter and f-number).

That makes sense vs doing it with just one and ISO. (I edited above)

As far as the dif goes....pic 1, 2, and 6 show significantly more loss of detail in the highs than the other 3 (roof left center). 6 almost looks as if the shutter speed was to slow resulting in motion blur. At the other end the shadow noise in 2, 4 , and 5 seems significantly higher than the other 3. Light was indeed changing slightly. So I'll go with 1 and 6 being most overexposed (loss of detail in highs) and 5 being closest to optimal as it seems to retain the most detail overall. That was fun.

So, can you place them in order of exposure on that basis?

Based on highlight detail loss I would group 1,2, and 6 as overexposed if metering for zone 7 in the highs. 5 then would be in the middles and have to stick 2 and 4 at the other end.  IF you used ADL...or Matrix...or the focus point shifted...then you have to throw out the results, I think. I am amazed at how very different the 6 pics are....combination of factors. Nest time just shoot a gray card

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