Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-15-2008, 09:07 PM   #1
Junior Member




Join Date: Dec 2007
Location: St. Louis area
Posts: 39
overexposed

so i went out shooting the other day, I was basically playing around. Anyways, I was playing with the aperture priority setting and using it wide open to get the effect where the close things are in focus and things far away are out of focus. Now I was under the impression that I had to have the aperture wide open (as possible) to get that effect. However I now see the downside of not knowing what I'm doing. So here are a few of the pics that I got.

f 4.5 1/125 sec
f 3.5 1/1500 sec


one example i think looks okay, given the mostly white or white-ish background color.

f 4 1/2000 sec


so my question is, what am I doing wrong other than obviously not paying attention to the histogram if I want the correct exposure yet keep the same effect?

12-15-2008, 09:17 PM   #2
Forum Member




Join Date: Sep 2007
Location: Fort Worth, TX
Photos: Gallery
Posts: 78
Subies.
Kick@$$.

What sort of lens are you using? On what camera?
You have achieved the effect you're talking about, unless you just want it more extreme looking, in which case you need a "faster" lens ---> something that will be wide open at say 3.x, 2.x or even 1.x.
Otherwise...just increase the exposure speed. Or since you're in Aperture Priority mode, dial down your exposure compensation.

Last edited by xixco; 12-16-2008 at 05:52 AM. Reason: cleaning up the stuff that made no sense
12-15-2008, 09:24 PM   #3
Veteran Member
LaRee's Avatar

Join Date: Nov 2006
Location: San Diego
Photos: Gallery
Posts: 2,225
To change the exposure when shooting in A mode, try dialing in some -ev adjustment, or you could shoot in manual mode and get the exposure you want.
12-15-2008, 09:36 PM   #4
Junior Member




Join Date: Dec 2007
Location: St. Louis area
Posts: 39
Original Poster
taken with the k100d super and the 17-70 sigma

i am wanting a less extreme look. as natural as possible is what im looking for. However, I think the subie pic looks pretty good. But obviously the histogram shows a bunch of pixels on the "bright" side.

also how do i go about toning down the exposure compensation?

12-15-2008, 09:49 PM   #5
Veteran Member




Join Date: Nov 2008
Location: New York, NY
Posts: 385
Exif Sub IFD

* Exposure Time (1 / Shutter Speed) = 1/1500 second = 0.00067 second
* Lens F-Number/F-Stop = 35/10 = F3.5
* ISO Speed Ratings = 1600
* Original Date/Time = 2008:11:08 02:28:39
* Flash = Flash did not fire, compulsory flash mode
* Focal Length = 21/1 mm = 21 mm
* Image Width = 3008 pixels
* Image Height = 2000 pixels

There is your problem!
12-16-2008, 06:18 AM   #6
Veteran Member
alohadave's Avatar

Join Date: Jan 2008
Location: Quincy, MA
Photos: Gallery | Albums
Posts: 2,024
QuoteOriginally posted by systemA Quote
Exif Sub IFD

* Exposure Time (1 / Shutter Speed) = 1/1500 second = 0.00067 second
* Lens F-Number/F-Stop = 35/10 = F3.5
* ISO Speed Ratings = 1600
* Original Date/Time = 2008:11:08 02:28:39
* Flash = Flash did not fire, compulsory flash mode
* Focal Length = 21/1 mm = 21 mm
* Image Width = 3008 pixels
* Image Height = 2000 pixels

There is your problem!
Agreed. Drop you ISO to 200 and your shutter speed will adjust to 1/60 (in Av mode). That will give you an equivalent exposure and you'll avoid problems with noise in any underexposed areas in your shots.

Also, if your subject isn't showing areas of pure white, then the highlights all the way to the right isn't necessarily a problem. If the areas that are blown out have no important details, or are part of the background look at the picture and if it doesn't detract, you can ignore it. Also, specular highlights will show up as blown pixels, even though there is no detail in those particular highlights.
12-16-2008, 08:42 AM   #7
Forum Member




Join Date: Sep 2007
Location: Fort Worth, TX
Photos: Gallery
Posts: 78
QuoteOriginally posted by wrxwheelman Quote
also how do i go about toning down the exposure compensation?
You should be able to turn one of your dials to adjust the exposure compensation meter. Mine is the front dial wheel in AV mode (but I may have set it this way).
On my camera (K10D), I see the compensation meter on the readout by the shutter and also in the viewfinder. I imagine yours is similar. If your meter is set to the right of center, move it to center and see what that does. If it's center now, dial it down a couple of steps and try that.

Looks something like this (can't find or take a picture):

- ------|-- +
- ----|---- +
- --|------ +

12-16-2008, 08:58 AM   #8
Veteran Member
heliphoto's Avatar

Join Date: May 2008
Location: Region 5
Photos: Gallery
Posts: 2,539
I would guess that your metering mode is set to spot metering. If that is the case, the camera will meter the area inside the () in the center of your viewfinder, and moving a few degrees will have drastic effects on your exposure as light and dark objects travers the center metering area. If you are on spot metering or center weighted metering, try setting matrix metering to have the camera meter the available light from the whole scene.
12-16-2008, 09:09 AM   #9
Inactive Account




Join Date: Dec 2006
Location: Outside of Philly
Posts: 1,561
Nope,
Exposure Compensation=+2 (for the rose picture)

is the problem Setting EC to +2 will generally result in a very bright photo

You'll run into overexposure at ISO1600 and EC=0 if you "run out of shutter speed" but at 1/1500s you had a little more than a stop left to go (as 1/4000 is the max on Pentax bodies)

QuoteOriginally posted by systemA Quote
Exif Sub IFD

* Exposure Time (1 / Shutter Speed) = 1/1500 second = 0.00067 second
* Lens F-Number/F-Stop = 35/10 = F3.5
* ISO Speed Ratings = 1600
* Original Date/Time = 2008:11:08 02:28:39
* Flash = Flash did not fire, compulsory flash mode
* Focal Length = 21/1 mm = 21 mm
* Image Width = 3008 pixels
* Image Height = 2000 pixels

There is your problem!
12-16-2008, 09:10 AM   #10
Inactive Account




Join Date: Dec 2006
Location: Outside of Philly
Posts: 1,561
Checked the EXIF on the first photo, and it's also set at +2EC....
12-16-2008, 09:38 AM   #11
Veteran Member
Ivan Glisin's Avatar

Join Date: Nov 2006
Location: Belgrade
Posts: 656
QuoteOriginally posted by wrxwheelman Quote
so my question is, what am I doing wrong other than obviously not paying attention to the histogram if I want the correct exposure yet keep the same effect?
Here is what you did (data from Firefox EXIF viewer):

Fist picture:

# Exposure Time (1 / Shutter Speed) = 1/125 second = 0.008 second
# Lens F-Number/F-Stop = 45/10 = F4.5
# Exposure Program = aperture priority (3)
# ISO Speed Ratings = 1600
# Exposure Bias (EV) = 20/10 = 2
# Metering Mode = pattern / multi-segment (5)

User error: Exposure compensation is +2 for the subject that is not white (or high-key) so it should not have been +2. With +2 subject with average tones looks overexposed with +2 and that is normal. Also, why ISO 1600 for daylight scenes? (If leaves are bright green I should gave used +0.5 or +1 depends on how bright you want them rendered, but not +2.)

Second picture:

# Exposure Time (1 / Shutter Speed) = 1/1500 second = 0.00067 second
# Lens F-Number/F-Stop = 35/10 = F3.5
# Exposure Program = aperture priority (3)
# ISO Speed Ratings = 1600
# Exposure Bias (EV) = 20/10 = 2
# Metering Mode = pattern / multi-segment (5)


User error: Similar to #1, however in this case the main subject is mainly white so +2 should have worked but NOT with multi-segment metering: darker background has confused multi-segment metering. In this case center-weighted metering and +1.5 should have been used, or spot metered from the white area and +2.5 then recomposed for the shot. Again, ISO 1600 was not necessary.

# Exposure Time (1 / Shutter Speed) = 1/2000 second = 0.0005 second
# Lens F-Number/F-Stop = 40/10 = F4
# Exposure Program = aperture priority (3)
# ISO Speed Ratings = 1600
# Exposure Bias (EV) = 20/10 = 2
# Metering Mode = pattern / multi-segment (5)


Exactly the same as #2.

Hope this helps.
12-17-2008, 08:27 AM   #12
Banned




Join Date: Apr 2008
Location: Hudson Valley of NY
Posts: 56
Once again examples of how much Pentax metering sucks!!!
12-17-2008, 09:15 AM   #13
Senior Member




Join Date: Jan 2008
Location: Barrie, ON
Photos: Gallery
Posts: 174
QuoteOriginally posted by explr1 Quote
Once again examples of how much Pentax metering sucks!!!
Didn't we just come to the conclusion that it was user error? No matter how good the metering is, when you set your camera to +2 Ev you are telling your camera to over expose. The camera can't tell what you are thinking, yet...
12-17-2008, 09:19 AM   #14
graphicgr8s
Guest




I don't know I think Pentax metering is actually pretty good. Mostly it's OA.
WRXWheelman try 200 ISO or even 400. Then bring your EC to 0. Use averaging or center weighted metering with the aperature wide open. Aperature priority.
12-17-2008, 09:50 AM   #15
Inactive Account




Join Date: Dec 2006
Location: Outside of Philly
Posts: 1,561
Like in this post - https://www.pentaxforums.com/forums/pentax-dslr-discussion/35704-why-does-happen.html

The (over|under) exposure is entirely 100% OPERATOR ERROR!

(oh, look who wrote the linked post? )

ON ANY SYSTEM - Setting EC=+2 will result in overexposure
and spot metering on a white object will result in underexposure.....

Not sure what the heck is up with the chip on explr1's shoulder, but he should have stuck with Pentax and LEARNED how to use it before (1)Jumping ship and (2)return here to troll with his anti-Pentax rhetoric.

OP - Set EC to ZERO next time
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
aperture, camera, effect, focus, photography, sec
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Overexposed pictures - K10D ? lesmore49 Pentax DSLR Discussion 9 01-19-2024 06:40 AM
K20D - Images overexposed & saturated Johnny5 Pentax DSLR Discussion 16 06-05-2010 01:33 PM
Overexposed Nighshots! HELP! The Kurly One Troubleshooting and Beginner Help 28 04-19-2010 02:42 PM
K100 Super Manual Lens Yellow Tint/Overexposed??? Grzldvt Pentax SLR Lens Discussion 8 06-09-2009 05:13 PM
Overexposed betsypdx Post Your Photos! 12 11-20-2007 12:48 AM



All times are GMT -7. The time now is 05:14 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top