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telephoto'n ??????????Anonymous??
sup /p/,

i'm playing with my 75-200mm and I can't really seem to get photos at the max 200mm without serious grain or exposure issues. does anyone have some pointers? i tried google but didn't find anything really useful, so any helpful links are appreciated as well.
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Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon EOS DIGITAL REBEL XTCamera SoftwareAdobe Photoshop CS2 WindowsImage-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution72 dpiVertical Resolution72 dpiImage Created2007:07:11 15:30:01White Point Chromaticity0.3Exposure Time1/800 secF-Numberf/22.0Exposure ProgramAperture PriorityISO Speed Rating1600Lens Aperturef/22.0Exposure Bias0 EVMetering ModePatternFlashNo Flash, CompulsoryFocal Length200.00 mmColor Space InformationUncalibratedImage Width800Image Height533RenderingNormalExposure ModeAutoWhite BalanceAutoScene Capture TypeStandard
>> ??????????Anonymous??
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original included for discussion's sake

Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon EOS DIGITAL REBEL XTCamera SoftwareAdobe Photoshop CS2 WindowsImage-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution72 dpiVertical Resolution72 dpiImage Created2007:07:11 15:30:15White Point Chromaticity0.3Exposure Time1/800 secF-Numberf/22.0Exposure ProgramAperture PriorityISO Speed Rating1600Lens Aperturef/22.0Exposure Bias0 EVMetering ModePatternFlashNo Flash, CompulsoryFocal Length200.00 mmColor Space InformationUncalibratedImage Width3456Image Height2304RenderingNormalExposure ModeAutoWhite BalanceAutoScene Capture TypeStandard
>> Anonymous
a) At 200mm (320mm equivalent on your Rebel) haze and hot air currents can spoil your photos if you shoot very distant objects; looks like it's the case here.
b) Why did you shoot at f22/1600 ISO when you could've used, say, f11/400 ISO and got much sharper photo with less noise? I don't see anything that warrants the use of f22.
>> ac !!VPzQAxYPAMA
W...why?

You're shooting ISO1600. When you do that, you're going to get crazy noise. You need to shoot at ISO1600 to shoot with a reasonable shutter speed, though, because you've got your aperture set ti f/22 instead of something that's not completely insane.

So:
1. Drop your ISO to 400 or lower.
2. Increase your aperture to something like f/5.6 or so
3. Go read up on the basics of exposure.
>> ??????????Anonymous??
seems you both noticed my aperture setting. well that's because i read something on google stating i should do that. literally it said max it out. gonna retry this same pic while i got daylight
>> Anonymous
>>61839
Google was wrong. You're risking diffraction at high apertures like that, first of all.
>> ac !!VPzQAxYPAMA
>>61839
How exactly did they phrase it? Was it "Use your largest aperture"?

Because if so, you're doing the opposite of what they suggest.
>> ??????????Anonymous??
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thanks /p/
>> ??????????Anonymous??
>>61842
well it was on a message board and it was phrased like use the highest f-stop. which i guess i should've known better
>> Anonymous
>>61845
http://www.bobatkins.com/photography/technical/diffraction.html

don't go past f/16 on a cropped sensor
>> Anonymous
>>61839
Yea, maxing it out probably meant using the largest aperture, which is also the smallest number, on your lens probably 5.6.
>> Anonymous
F22. LOL. Smaller aperture means bigger number, and big aperture smaller number.

f number (aperture) means how big the hole is where light passes through. The bigger the hole, the more light gets to sensor, and the better (usually).

If F2 is like ( ) (pretty big) F22 is like . (like looking through a needle hole)