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RE: Is that junk on your sensor?

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Posted by: erik w at Sat Apr 7 09:43:27 2007  [ Report Abuse ] [ Email Message ] [ Show All Posts by erik w ]  
   

Hey man,

sorry, old photo - My diffuser does indeed create a strong warm color cast, and I usually just correct the cast in photoshop. Looks like I forgot to do that in this one, I just slapped it up because it fit the discription. I updated the link accordingly, to a more natural looking pic.



The exposure is dead on though - if it looks overexposed to you, you might need to calibrate your monitor. Brightness, contrast and gamma all effect the way images are displayed, and one of those being "off" might make a shot look a whole lot different than it is. you can tell the exposure is good from the histogram. That may also explain why your photo is underexposed - it might look right on your screen, despite being under!



Here is the histogram from that photo. The tones range more or less evenly from left to right, with only a tiny bit of clipping on the highlight side (those blown highlights on his side). A histogram like this is perfectly exposed for a shot where middle gray is exposed to middle gray. That might not always be the goal - sometimes a little under or over is a good thing, but in this shot there is an even range of tones and middle gray looks good as middle gray.






-----
Erik Williams

fattailed geckos, western hognoses, and a bunch of postage stamps.
Contact me
www.chicagoherp.org
Chicago Herpetological Society


   

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