How to compensate overexpose and underexpose


Jun 8, 2006
40
0
6
#1
when i focus on the sky, the grass got underexpose



Uploaded with ImageShack.us

but when i focus on the grass, the sky got overexpose



Uploaded with ImageShack.us



can any tell mi how to balance between the right amount of exposure on the sky and the grass?
 

Last edited:

Dream Merchant

Moderator
Staff member
Jan 11, 2007
9,659
6
38
#2
Welcome to CS!

That's because the EV range of the sky and ground is too wide. No sensor or film can capture that wide a range in a single shot.

Google 'Dynamic range'.

To 'compensate' or get a more balanced photo where you retain details in the sky (not over-exposed) AND get an adequately exposed foreground (not too dark), you have several options:

1) Use a graduated neutral density filter (GND)
2) Take two separate photos, exposing correctly for each part of the photo and merge them in post production (PhotoShop, Lightroom etc)
3) Do a High Dynamic Range photo (HDR)

Ref: Google the following for instructions:

1) Graduated neutral density filter (GND)
2) Tone Mapping
3) HDR

All the best! :)
 

pairdes

New Member
Sep 11, 2009
111
0
0
Singapore
#3
I believe there is 2 methods using a
1. GND filter
a filter that darkens the sky only google u can find lotsa info
2. HDR post processing
combining 2 different exposed picture into 1

camera unable to capture that much dynamic range.

Hope these help :)
 

Jun 8, 2006
40
0
6
#4
wow
thanks for the quick reply

very informative

will go google for the info you guys ahve mentioned

i currently using zeta protector for my len (kit len)

do you should i get a UV filter for my lens?
 

Last edited:

Diavonex

Senior Member
Sep 23, 2008
3,641
0
0
Admiralty
#5
Shoot when the sun is low and shining on the grass. That will reduce the density difference between the sky and the grass.

 

Last edited:

Diavonex

Senior Member
Sep 23, 2008
3,641
0
0
Admiralty
#7
This picture of the same location was shot with a polarising filter.

 

Jun 8, 2006
40
0
6
#8
http://www.pbase.com/jpeper/image/32267513/original.jpg

I happened to chance on this before so i thought I share with you on with or without UV filter.:)

Enjoy photography and let the photos you took along the way, guide you in what you need and what you dun:) May the Force be with you
it seems that UV filter make ur picture look a bit yellowish
 

ovaltinemilo

Senior Member
Sep 12, 2009
2,819
0
0
Sin jia Po lah
#9
If you can't get all in 1 shot. Then you got to decide the best exposure for your subject or exclude the sky if it's really too much tonal away....
 

Dec 12, 2009
1,961
2
0
#10
I am a newbie myself and I realised it can be tricky to get an acceptable exposure especially when I am quite inexperienced and when viewing through the viewfinder. I uses 500D and I realised that at times using the Live view mode through LCD helps because it shows the changes of your output picture 'LIVE' when you are focusing and metering at specific places ' the white rectangular box'. So sometimes when I am in no hurry, I will also slowly adjust through the lcd screen until I get an acceptable picture but I think nothing beats the techniques mentioned above by the more experienced people. :)
 

Jun 8, 2006
40
0
6
#11
I am a newbie myself and I realised it can be tricky to get an acceptable exposure especially when I am quite inexperienced and when viewing through the viewfinder. I uses 500D and I realised that at times using the Live view mode through LCD helps because it shows the changes of your output picture 'LIVE' when you are focusing and metering at specific places ' the white rectangular box'. So sometimes when I am in no hurry, I will also slowly adjust through the lcd screen until I get an acceptable picture but I think nothing beats the techniques mentioned above by the more experienced people. :)
oh

never thought that liveview can "preview" the pic in real time

thanks for the info :)
 

pairdes

New Member
Sep 11, 2009
111
0
0
Singapore
#12
Well the UV filter helps to reduce some Haze in the atmosphere.
*or something like that, correct me if i am wrong :confused:*

Not much experience with different UV filters but mine slightly tinted yellow.
 

Jun 8, 2006
40
0
6
#13
ya

was thinking of getting a UV filter when i got my cam

but the guy dun have UV filter for my lens size

so he bundle a protector instead
 

pairdes

New Member
Sep 11, 2009
111
0
0
Singapore
#14
Well i had the UV filter on mainly as a protector.
Dont feel it helps much with the pictures, but cheap UV filters do affect IQ in some way/s.

Protector should be sufficient, but i think more experienced CSers should be able to advise you correctly.

Can try to look into polarizer, the use quite limited, though effect is good for the sky.
*as shown by Diavonex* :D
 

hakkeem

New Member
May 6, 2010
51
0
0
#15
Use digital blending in Photoshop,if u need help pls search google.
 

Top Bottom