Question about exposure settings
Question about exposure settings
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Discussion

AndyS2

Original Poster:

869 posts

287 months

Saturday 7th September 2013
quotequote all
Took these two pictures this afternoon and I can get the exposure right for either the car or the sky, but how do I find a happy medium between the two? I want the sky from pic 2 on the car from pic 1!






upsidedownmark

2,120 posts

164 months

Saturday 7th September 2013
quotequote all
1) Graduated Neutral density filter - move it around to darken the sky without the car.
2) Do pretty much what you've done (can use the bracketing setting on the camera if there), and composite them - overlay and align both images as layers, then mask the bad bit out of the top one to allow the good bit to show through.
3) Wait until the end(s) of the day when the light is less harsh.

Not much you can do otherwise, there's simply more range of exposure than the camera can handle - Not sure what's current state of the art, but 7 stops or so is probably something like the range between white and black as far as the chip is concerned. If there's a huge difference between the light and dark tones as there are here, you're stuffed. This is why midday is a bad time to take photos smile

creampuff

6,511 posts

172 months

Saturday 7th September 2013
quotequote all
upsidedownmark said:
1) Graduated Neutral density filter - move it around to darken the sky without the car.
2) Do pretty much what you've done (can use the bracketing setting on the camera if there), and composite them - overlay and align both images as layers, then mask the bad bit out of the top one to allow the good bit to show through.
3) Wait until the end(s) of the day when the light is less harsh.

Not much you can do otherwise, there's simply more range of exposure than the camera can handle - Not sure what's current state of the art, but 7 stops or so is probably something like the range between white and black as far as the chip is concerned. If there's a huge difference between the light and dark tones as there are here, you're stuffed. This is why midday is a bad time to take photos smile
Yes this.

It looks like you could dial down the exposure in the top pic by about 1.5 stops, then lighten up the car in post processing too. This would give you some better detail in the sky.

Only if you are working at very close range, you can also underexpose the background and light up the foreground with flash (at close range, as you need a lot of flash power to do this in daylight).

See pic; has some post processing but not that much. Model was illumintated by flash but you can still see detail in the sky.


flat-planedCrank

3,697 posts

232 months

Saturday 7th September 2013
quotequote all
I'd have used a tripod and 'bracketed' across a range of exposures - gives you maximum flexibility to get the shot you want in photoshop (or other package)


Or, to do it in one shot expose the sky as brighly as you can (without 'clipping') and then boost the shadow areas - and live with any noise that is generated smile


If possible i'd have taken the first option smile

K12beano

20,854 posts

304 months

Saturday 7th September 2013
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AndyS2 said:
... how do I find a happy medium ...
Google "contented psychic" ....... always works for me.

Major Bloodnok

1,561 posts

244 months

Saturday 7th September 2013
quotequote all
flat-planedCrank said:
Or, to do it in one shot expose the sky as brighly as you can (without 'clipping') and then boost the shadow areas - and live with any noise that is generated smile
Assuming the OP is shooting RAW, do it the other way around. There's a lot more information in the brighter stops than in the darker ones, so it's more beneficial to pull back an over-exposed sky than to boost underexposed areas.

flat-planedCrank

3,697 posts

232 months

Saturday 7th September 2013
quotequote all
Major Bloodnok said:
flat-planedCrank said:
Or, to do it in one shot expose the sky as brighly as you can (without 'clipping') and then boost the shadow areas - and live with any noise that is generated smile
Assuming the OP is shooting RAW, do it the other way around. There's a lot more information in the brighter stops than in the darker ones, so it's more beneficial to pull back an over-exposed sky than to boost underexposed areas.
I was talking about finding some sort of middle ground, so don't clip the highlights so there is data to use. Then lift the shadows in post.

If the sky is 'normally' exposed then the main subject could be so underexposed that trying to lift it just turns it into grey mush smile

Turn7

25,678 posts

250 months

Saturday 7th September 2013
quotequote all
K12beano said:
AndyS2 said:
... how do I find a happy medium ...
Google "contented psychic" ....... always works for me.
I'm there Beano.... hehe

Janesy B

2,625 posts

215 months

Saturday 7th September 2013
quotequote all
Can just do a grad tint in lightroom.

DibblyDobbler

11,488 posts

226 months

Saturday 7th September 2013
quotequote all
Chop the sky from one pic and stick it on the other? This is a 5 minute job but you get the idea smile


sky and car by Dibbly Dobbler, on Flickr

K12beano

20,854 posts

304 months

Sunday 8th September 2013
quotequote all
Slightly more seriously....



Take shots in RAW, because that's where you'll manage the greatest dynamic range.

Use the hystericalgram and manual - or set off a bracketted sequence. Back at the ranch merge (my preference is Photomatix Pro - but you're not going for the stark "HDR Look") et voila!


Black cars are especially fun!


TVR T350c -19 by Beano!, on Flickr


TVR T350c -20 by Beano!, on Flickr

Edited by K12beano on Sunday 8th September 08:29

AndyS2

Original Poster:

869 posts

287 months

Sunday 8th September 2013
quotequote all
DibblyDobbler said:
Chop the sky from one pic and stick it on the other? This is a 5 minute job but you get the idea smile


sky and car by Dibbly Dobbler, on Flickr
That's what I was aiming for , but that's cheating!

I've only had a DSLR about a month and don't have any post processing software at the moment. Oh well, that's something else to learn.

Simpo Two

92,694 posts

294 months

Sunday 8th September 2013
quotequote all
AndyS2 said:
That's what I was aiming for , but that's cheating!
You will have to cheat to achieve what you want. The human eye looks across a scene and adjusts itself for focus and exposure as it goes. A camera can't do that.

K12beano

20,854 posts

304 months

Sunday 8th September 2013
quotequote all
AndyS2 said:
That's what I was aiming for , but that's cheating!

I've only had a DSLR about a month and don't have any post processing software at the moment. Oh well, that's something else to learn.
Before you get the cheque book out on any software choices:

  • have you RTFM for the camera - not that I'd let it, but my dSLR will actually do a bit of trickery inside
  • free or 30 day trial is your first software foray!

davepoth

29,395 posts

228 months

Sunday 8th September 2013
quotequote all
A graduated filter would probably do what the OP is looking for.

K12beano

20,854 posts

304 months

Sunday 8th September 2013
quotequote all
davepoth said:
A graduated filter would probably do what the OP is looking for.
I have nothing against the humble grad. And in the hands of the talented - including many who frequent these parts - they can be a great solution.

For the less talented like me, and possibly the OP while on the early part of his learning curve, I just think the grad is a fiddly solution, slows the process down (not necessarily a bad thing!) and becomes a complete frustration when your horizon is no longer an unbroken straight line that you can match the transition to.

Just my tuppence. OMMV.

upsidedownmark

2,120 posts

164 months

Sunday 8th September 2013
quotequote all
Simpo Two said:
You will have to cheat to achieve what you want. The human eye looks across a scene and adjusts itself for focus and exposure as it goes. A camera can't do that.
This. If you want to be purist, wait for better light wink

flat-planedCrank

3,697 posts

232 months

Sunday 8th September 2013
quotequote all
upsidedownmark said:
Simpo Two said:
You will have to cheat to achieve what you want. The human eye looks across a scene and adjusts itself for focus and exposure as it goes. A camera can't do that.
This. If you want to be purist, wait for better light wink
Always find this to be an interesting debate, is editing to replicate human vision 'cheating'? smile

AndyS2

Original Poster:

869 posts

287 months

Sunday 8th September 2013
quotequote all
I don't have a problem editing my photo to enhance it, but cutting and pasteing the sky from a different picture I didn't even take, now that is cheating.

DibblyDobbler

11,488 posts

226 months

Sunday 8th September 2013
quotequote all
AndyS2 said:
I don't have a problem editing my photo to enhance it, but cutting and pasteing the sky from a different picture I didn't even take, now that is cheating.
It's actually from the other pic above wink