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03-17-2009, 07:07 AM   #1
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Trying the suggestions I got in my previoius thread and have camera(K200d) with 18-55 lens set at 18mm shows f3.5, got iso set to 1600 and mode on Tv with shutter speed of 125,,,,took 3 pics in livingroom with the ev compensation ( I THINK) set at 0 , at +2.0 , and at -2.0 and all 3 pics look exactly the same,, too dark??? Am I assuming wrong that if I press down the Av button and rotate the wheel to get those 3 different settings showing in the info window aren't I supposed to be changing the light exposure?? Or is there some other control I am supposed to use?

03-17-2009, 07:33 AM   #2
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QuoteOriginally posted by olphart Quote
Trying the suggestions I got in my previoius thread and have camera(K200d) with 18-55 lens set at 18mm shows f3.5, got iso set to 1600 and mode on Tv with shutter speed of 125,,,,took 3 pics in livingroom with the ev compensation ( I THINK) set at 0 , at +2.0 , and at -2.0 and all 3 pics look exactly the same,, too dark??? Am I assuming wrong that if I press down the Av button and rotate the wheel to get those 3 different settings showing in the info window aren't I supposed to be changing the light exposure?? Or is there some other control I am supposed to use?
I do not own a K200D, but looking at the EXIF data of the 3 photos would let you understand what really happened.

- Bert
03-17-2009, 12:21 PM   #3
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Are any of those settings blinking at you in the viewfinder display when you take the picture?
03-17-2009, 08:07 PM   #4
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QuoteOriginally posted by olphart Quote
Trying the suggestions I got in my previoius thread and have camera(K200d) with 18-55 lens set at 18mm shows f3.5, got iso set to 1600 and mode on Tv with shutter speed of 125,,,,took 3 pics in livingroom with the ev compensation ( I THINK) set at 0 , at +2.0 , and at -2.0 and all 3 pics look exactly the same,, too dark???
In Tv mode, you are saying you want to pick the shutter speed, but will let the camera choose an appropriate aperture. I don't know what kind of lighting you were dealing with, but I'll assume it was relatively dim. Most likely, i order to get a good exposure at ISO 1600 and 1/125 shutter speed, you'd need an aperture of f/1.4 or larger. Well, your lens doesn't have an aperture that large. So there is is not way the camera can possible set the aperture that big. And certainly, dialing in positive compensation - asking the camera to choose an even *larger* aperture - is like asking a homeless man for a loan of a million dollars, and when he says he doesn't have it, asking him for two millions instead.

Dialing in negative compensation would eventually "work" - if you dialed in enough of it, eventually you'd succeed in making the picture *even darker*.

Basically, if you want a brighter picture but don't have a brighter (larger maximum aperture) lens, you're going to need a to start with a slower shutter speed if you use Tv mode.

03-17-2009, 09:47 PM   #5
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1/125 indoors w/ the Kit...yeah..your not going to get much out of that...
try slowing it down....lets say 1/30..... then go from there (set ISO to 800 or something)

kit's max aperture is f/3.5 @ 18mm...thats not wide or "fast"enough really

in body SR helps too...u can notch taht down to like 1/15 and still get away w/ it..(w/ steady hands of course)
03-19-2009, 08:47 AM   #6
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Tv mode can EASILY lead to underexposed shots if you don't know what you are doing AND the lens isn't bright enough. If you switch to Av mode, go to f/3.5 @18mm and ISO1600, you'll get a much brighter picture, although the shutter speed would be alot slower.

Honestly, I never use Tv, only Av and Manual.
03-19-2009, 09:30 AM   #7
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I posted this in your other thread, but here it is again. Go buy this book: Amazon.com: Magic Lantern Guides: Pentax K200D: Michael Guncheon: Books
03-19-2009, 09:43 AM   #8
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QuoteOriginally posted by egordon99 Quote
Honestly, I never use Tv, only Av and Manual.
I'm with you there...Av and manual almost exclusively. On a rare occasion I will shoot in P mode when a situation arises where I need to quickly pull the camera from the bag and take a quick shot (kids doing something silly, etc.), but I will still pay close attention to what settings are being decided for me and will quickly over-ride them if necessary.

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