Unsharp images on 55-250

mrbez

mrbez

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Hi Guys,

I have just taken a shot of a wood pigeon, zoomed to 250mm hand held.

It looked great on the camera, put it on the mac and it still looks sharp. As soon as I went in to 100% the sharpness was poor.

Is this normal, or am I just a crap 'toger? :P Haha
 
Post a image at 100% please..;)
 
4853453721_847385b82b_b.jpg
 
thats a Collared Dove ;)

and the image shows huge amounts of motion blur/camera shake. What was your shutter speed?
 
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I would also say camera shake.
 
I think it was around 100 at F5.6

I am guessing that is I increased the F stop, I would need to slow the shutter down?

Therefore I should bump up ISO and increase shutter speed?
 
General rule of thumb keep your shutter speed equal or faster than your focal length. So 1/250th sec or faster on a 250mm lens.

Possibly less relevant on VR ir IS lenses though.
 
chip said:
General rule of thumb keep your shutter speed equal or faster than your focal length. So 1/250th sec or faster on a 250mm lens.

Possibly less relevant on VR ir IS lenses though.
Click to expand...

I think you still have to take in the x1.6 crop factor don't you? So at 100m it will come out at 160mm so the shutter speed needs to be faster than 1/160th sec.

I could be talking bull!:D
 
Nope you're right andy.

I can get sharp images at half the shutter speed I'd use without IS.

Basically, if you're shooting at 250mm, (which is like 400mm) you need to shoot at around 1/200th of a second to get properly sharp images.
I've got a few shakey images from 1/50 of a second on 250mm but ideally, if light allows, 1/200th. You'll have pin sharp images in no time.
 
That depends if you're trying to freeze the action (fast shutter speed), or pan with the vehicle and get some nice wheel/background blur by using a slowish shutter speed. That's something the takes practice because you need to keep the camera dead in time with the subject, moving smoothly, to avoid lots of blur everywhere.
 
Definite camera shake and/or the bird moved fairly rapidly when you pressed the shutter. Try a higher ISO, and therefore higher shutter speed, and keep the camera pressed close to your eye to reduce the likelihood of camera shake. Takes some time to perfect but it works. My 55-250 has always been super sharp.
 
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