Thread: minimum shutter speed for focal length

1. minimum shutter speed for focal length

i understand that if we use focal lenght of 50mm, then the minimum shutter speed will be 1/focal length, that is 1/50s.

so focal length of 100mm, will be 1/100s

focal length of 35mm, will be 1/35s, etc

so the question is, are the above formual base on full frame or crop camera, or both?

thanks.

2. Re: minimum shutter speed for focal length

Originally Posted by takengo2003
i understand that if we use focal lenght of 50mm, then the minimum shutter speed will be 1/focal length, that is 1/50s.

so focal length of 100mm, will be 1/100s

focal length of 35mm, will be 1/35s, etc

so the question is, are the above formual base on full frame or crop camera, or both?

thanks.
This formula is use for 35mm or FX sensor, so if using crop sensor, do multiplex the crop factor.

3. Re: minimum shutter speed for focal length

It's based on full frame 35mm sensors.

So for cropped bodies, it's 1/(focal length * crop factor).

Eg, using a 1.6 crop body @ 50mm. Minimum recommended shutter speed would be

1/(50*1.6) = 1 / 80 s. Cheers.

It's just a guide anyhow. I get away with doing 1/50 on my crop body...it all depends on how stable your handling is, and use of supports. Higher focal lengths more difficult to handle.

4. Re: minimum shutter speed for focal length

thanks to both of you, so it is for full frame.

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