Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Forums  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear
Guest
Forums  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear
Register to forums    Log in

 
FORUMS Photo Sharing & Discussion Critique Corner 
Thread started 26 Oct 2008 (Sunday) 19:38
Search threadPrev/next
sponsored links (only for non-logged)

pls help diagnose problem

 
xxkenxx
Hatchling
3 posts
Joined Oct 2008
Location: FL
     
Oct 26, 2008 19:38 |  #1

These are 1st pics with my new (used) XT 350D. I am in the process of going through a tutorial (Blue Crane?) on how to use my Camera so I am only using Basic settings & JPEG right now. I am very disatisfied with what I have done so far. I have been able to slightly improve the quality using "Auto Level" in Paint.net, but shouldn't these be better without having to do that?

I took a couple others today that were worse, very washed out looking (sorry for the non-technical descriptions).

I am using the lens I got with the camera, a Sigma 18-50 1.3-5.6. I understand that this is not the best of lenses and have a better lens on order.

Any suggestions would be appreciated

(top pic is after auto-evel)


HOSTED PHOTO
please log in to view hosted photos in full size.



HOSTED PHOTO
please log in to view hosted photos in full size.




  
  LOG IN TO REPLY
eror11
Senior Member
314 posts
Likes: 1
Joined Jul 2008
Location: Europe
     
Oct 26, 2008 21:03 |  #2

i really think you should be taking pics in raw format... then you could fix this with a nudge of a slider... basically the problem is this - the photo has a high dynamic range, meaning the difference between the darkest dark and the lightest white colors is too far apart for the sensor of your camera to handle... so when you chose which part of the frame you wanted your camera to meter on, it did its best to expose that part ok, and could do nothing else about the other parts.

In your case, the well exposed part is the harbor, boats and the street across. The burned out part is the sky.

There are other ways to "fix" this except in post processing... how?

1) read up on hdr...
2) get a gradient filter for your lens... its not too expensive and it darkens your sky so its much much bluer and more beautiful basically
3) if you photo in raw, go to the levels graph and reduce the highlights and the brights, also some recovery maybe etc... you can fix most of this problem there

and then there's the lens .... :)


7D with 24-70

  
  LOG IN TO REPLY
gjl711
Wait.. you can't unkill your own kill.
Avatar
57,738 posts
Likes: 4072
Joined Aug 2006
Location: Deep in the heart of Texas
     
Oct 26, 2008 21:22 |  #3

The subject you choose is difficult to capture all in one shot as you have a very bright sky and a much darker foreground. If you expose for the sky the foreground will be very dark. If you expose for the foreground, the sky will blow out.

Is your goal to fix this specific picture of is it to learn how to shoot in these difficult situations? If the former, that's pretty straight forward and a few PS adjustments can bring this pic right where it should be. If it's the latter, there are techniques that you can use at the time you capture the picture so that PS adjustment is not necessary.


Not sure why, but call me JJ.
I used to hate math but then I realised decimals have a point.
.
::Flickr:: (external link)
::Gear::

  
  LOG IN TO REPLY
Robert_Lay
Cream of the Crop
Avatar
7,546 posts
Joined Jul 2005
Location: Spotsylvania Co., VA
     
Oct 26, 2008 21:35 |  #4

The lens is not the problem. You should learn to use the on-board histogram and from the histogram learn to make judgements about the exposure. Once you get the hang of shoot a little and examine a little you will find your exposures are more correct. Trusting the auto-exposure metering system is not always the best strategy, because the light meter is as dumb as a rock. If you are not smarter than it, then we are in a lot of trouble. You may want to keep things in Manual mode until you figure out what does what.

We've identified the problem - too dependent upon auto-exposure and not using the feedback that is available to you immediately after taking the picture (histogram).

We've suggested a cure - learn to use manual controls (ISO, Aperture, & Shutter) and the histogram to correct bad exposures while still at the location

And now it's up to you to take the bull by the horns.


Bob
Quality of Light (external link), Photo Tool ver 2.0 (external link)
Canon Rebel XTi; EF-S 10-22mm f/3.5-f/5.6 USM; EF-S 18-55 mm f/3.5-f/5.6; EF 28-135mm f/3.5-5.6 IS USM; EF 50mm f/1.4 USM; Canon Powershot G5; Canon AE1(2); Leica R4s; Battery Grip BG-E3; Pentax Digital Spotmeter with Zone VI Mod & Calibration.

  
  LOG IN TO REPLY
acchildress
Senior Member
986 posts
Joined Oct 2007
     
Oct 27, 2008 09:57 |  #5

Yeah, what they said. But I saw another error that should be fixed everytime it happens. Your horizon is really off. I know that it's not one of the things you were really asking about but it's one of those basic things that should be fixed every time you work on a shot. Better yet make it a habit to look out or that when you take the shot. It's one of those things that make it hard to look at a photo sometimes.



Come be a big fish in a little pond, help build
theanswerjar.com  (external link)

  
  LOG IN TO REPLY
xxkenxx
THREAD ­ STARTER
Hatchling
3 posts
Joined Oct 2008
Location: FL
     
Oct 27, 2008 18:47 |  #6

Thanks for the help!!




  
  LOG IN TO REPLY
Bill ­ Boehme
Enjoy being spanked
Avatar
7,359 posts
Gallery: 39 photos
Best ofs: 1
Likes: 89
Joined Jan 2007
Location: DFW Metro-mess, Texas
     
Oct 27, 2008 19:33 as a reply to  @ xxkenxx's post |  #7

I am not convinced that a wide dynamic range of light in the scene and improper exposure are the problems as most everyone seems to think. Here are some things that do not support that argument:


  1. There are no black areas that lack any detail.
  2. As shown in the edited image in which the OP used auto levels, it appears that there are no blown out highlights in the sky (however the extreme amount of jpg compression makes it a little difficult to give an absolute evaluation).
  3. The generally low contrast image is not what I would expect to see if the captured scene actually had a dynamic range that was too great to record in a single shot.
Since OP is shooting JPG currently, I think that the flatness of the original image might be the result of using AdobeRGB as the colorspace, but processing the image in his software as an sRGB colorspace image. Secondly, trying to recoup tonal range from a misapplied profile to an 8-bit image is almost certain to produce a hit on image quality. Finally, auto levels is normally not a very reliable means of tonal adjustment -- it works OK some of the time, but the more help that an image needs, the less likely it is to provide good results.

If OP confirms my suspicion about AdobeRGB being used as the colorspace, my recommendation is to switch to sRGB because using AdobeRGB requires having a fairly good handle on understanding color management in order to stay out of trouble.

Atmospheric haze in images? Click for Tutorial to Reduce Atmospheric Haze with Photoshop.
Gear List .... Gallery: Woodturner Bill (external link)
Donate to Support POTN Operating Costs

  
  LOG IN TO REPLY
Bill ­ Boehme
Enjoy being spanked
Avatar
7,359 posts
Gallery: 39 photos
Best ofs: 1
Likes: 89
Joined Jan 2007
Location: DFW Metro-mess, Texas
     
Oct 27, 2008 20:46 as a reply to  @ Bill Boehme's post |  #8

Here is an example of editing the image if I first arbitrarily assign a color profile of AdobeRGB based on my stated assumption and then after editing, convert the profile to sRGB before doing a save for web. I reduced the image size to keep the file size within limits while still maintaining reasonable JPG quality.


HOSTED PHOTO
please log in to view hosted photos in full size.


Atmospheric haze in images? Click for Tutorial to Reduce Atmospheric Haze with Photoshop.
Gear List .... Gallery: Woodturner Bill (external link)
Donate to Support POTN Operating Costs

  
  LOG IN TO REPLY
SwingBopper
Goldmember
Avatar
2,664 posts
Likes: 3
Joined Oct 2007
Location: Japan
     
Oct 28, 2008 04:25 |  #9

That edit really makes a difference Bill. What did you do before converting to sRGB?


EOS 5D II, 40D, Sony R1, Olympus 1030, Canon S5-IS.
"Those who stand for nothing fall for anything." A. Hamilton

  
  LOG IN TO REPLY
Bill ­ Boehme
Enjoy being spanked
Avatar
7,359 posts
Gallery: 39 photos
Best ofs: 1
Likes: 89
Joined Jan 2007
Location: DFW Metro-mess, Texas
     
Oct 28, 2008 11:02 |  #10

SwingBopper wrote in post #6575284 (external link)
That edit really makes a difference Bill. What did you do before converting to sRGB?

Basically, tonal adjustments in ACR -- brightness, contrast, blacks, clarity, andd vibrance.


Atmospheric haze in images? Click for Tutorial to Reduce Atmospheric Haze with Photoshop.
Gear List .... Gallery: Woodturner Bill (external link)
Donate to Support POTN Operating Costs

  
  LOG IN TO REPLY
xxkenxx
THREAD ­ STARTER
Hatchling
3 posts
Joined Oct 2008
Location: FL
     
Oct 28, 2008 18:11 as a reply to  @ Bill Boehme's post |  #11

Thanks Bill,

Yes, My camera was set to AdobeRGB. I Have set it ti Srgb. The changes you made made made quit an improvement.

I will make note to match colorspace values.

I realize this is elementary stuff to most of you, thanks for putting up with me.

From the suggestions I've had, next time I:

manualy check and set ISO to match lighting conditions.
manual aperture & focus
shoot in raw format
stay away from "auto levels" when editing
straighten horizon (I can do that :))
-
learn to use histogram

Got my new lens: Tamron 17-50 1:2.8 !
Gradient Filter and PSE on order!




  
  LOG IN TO REPLY
lekriesel
Member
60 posts
Joined Jan 2007
     
Oct 28, 2008 19:39 |  #12

ok here is mine, it might be a little dark saved as camera raw / straightned horizon and a little levels control. probabley a little to saturated

IMAGE NOT FOUND
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO



  
  LOG IN TO REPLY
sponsored links (only for non-logged)

1,067 views & 0 likes for this thread, 8 members have posted to it.
pls help diagnose problem
FORUMS Photo Sharing & Discussion Critique Corner 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Forums   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset   •  Home

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.58forum software
version 2.58 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member was a spammer, and banned as such!
2879 guests, 132 members online
Simultaneous users record so far is 15,144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.