Night photography

<p>I like doing a lot of night photography and I regularly feel my images are not sharp even after using a steady tripod.<br>

I usually choose more than 4 minutes exposure vvith F 11 @ 100 ISO</p>

<p>i vvant to knovv the reason vvhy my images get grains even on 100 ISO...is it because of the lens 18-55 vvith a 500D<br>

or very long exposures tends to get grains.<br>

Plz post your suggestion.</p>

<p>Many Thanks.</p>

<p> </p>

<p>Are you talking about moonlight photography or just long exposures at night? <br>

When I started doing moonlight long exposures I was getting some blur on my images, even tho I was using a heavy tripod. Things that helped was using a release cord, and locking the mirror up.<br>

I also noticed that even walking around the tripod while the exposure was going would affect the sharpness of the pictures, specially for exposures longer than 4 minutes. I think the longer the exposure and the less available light you have the more grain you will see. I recommend lowering your F stop to like 4 at least, go for shorter exposures, lock the mirror up, cable release, dont walk around tripod while exposure is going, and use the most of the moonlight!</p>

<p>Alex Thank u so much...<br>

i ll take care of vvalking around vvhen the shutter is open- f-4 and yes i already use a remote..<br>

thanks again Alex n tomorrovv ill shoot again n let u knovv the results.</p>

<p>:)</p>

<p>Why do you use VV instead of W?</p>

<p>Or you could just shoot some medium format/large format film and never worry about noise... just a little bit of reciprocity error. :)</p>

<p>One thing to double check is if your using an IS lens you need to turn it off becuase your eliminating vibration by using a tripod. If you leave it on while your camera is on the tripod the lens will be trying to stabilize your shot resulting in a bit of blur.<br>

Hope this helps.</p>