File :-(, x, )
Anonymous
If I had a 50mm on my D70s, should I...

a. set min. shutter speed to 1/50
b. set min. shutter speed to 1/75

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Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon PowerShot A650 ISCamera SoftwareAdobe Photoshop CS2 WindowsMaximum Lens Aperturef/2.8Sensing MethodOne-Chip Color AreaImage-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution180 dpiVertical Resolution180 dpiImage Created2008:06:08 04:10:52Exposure Time1/8 secF-Numberf/2.8ISO Speed Rating400Lens Aperturef/2.8Exposure Bias-1/3 EVMetering ModeCenter Weighted AverageFlashNo Flash, CompulsoryFocal Length7.40 mmColor Space InformationsRGBImage Width640Image Height480RenderingNormalExposure ModeManualWhite BalanceAutoScene Capture TypeStandard
>> Anonymous
>>200137
so if its a 25mm 1/50 or 1/25?
oly fag here
>> Anonymous
i dunno 1/50?
>> Anonymous
>>200141
The Oly has a x2 crop factor, so 1/50
>> Anonymous
>>200141

oh lawd, sweet sweet pancake
>> Butterfly !xlgRMYva6s
>>200139
In a force 6 gale.
>> Anonymous
if you're going to use the 1/fl rule, use what it is on the crop and not what it equates to on 35mm.
>> Anonymous
>>200146
CROP FACTOR IS IRRELEVANT.
MIN SHUTTER SPEED IS 1/FOCAL LENGTH.
Crop factor is not factor.
Focal length remains the same. Even if bullshit camera places try to explain what crop factor means by explaining things in 'equivalent' focal lengths, THE GODDAMN FOCAL LENGTH DOESNT FUCKING CHANGE
>> Anonymous
>>200183
Yes, but the field of view does. This is just some general guideline bullshit for inexperienced users who haven't gotten a feel for their own capabilities or developed them very far. Someone noticed that for 135 film, 1/focal length just happened to stop people from fucking up.

With crop bodies based on 135, the field of view is narrower; that's what "crop" refers to. The magnification of the whole scene, including the errors, is more. So that gets adjusted, too.
>> Anonymous
>>200183
But the effective area of that focal length changes. If by your logic, my P&S with a focal length of about 5mm should get practically no fucking blur even if I mount it on a vibrator..
>> Anonymous
>>200183

Crop factor does matter for that rule.
>> Anonymous
>>200183
CROP FACTOR IS NOT IRRELEVANT

The quality that determines what is "acceptably" in focus and out of focus on an image is called circle of confusion. The size of the circle of confusion is directly related to the size of the format- larger formats have larger circles of confusion and smaller formats have smaller. The larger the circle of confusion, the larger the room for error in sharpness, thus is stands to reason that the smaller the format the more critical sharpness is. Any error present (say, for example, motion blur) on 35mm will be magnified on a crop sensor. It is then reasonable to increase the rule of thumb for handheld shooting, and conveniently enough we already have crop factors, so we might as well just use the 1/crop*focal length as the rule of thumb for digital.
>> Anonymous
>>200149
want one!