Light fall off

[hh28360]

hi - apologies if this is not the right plac to post this. i have just bought a new lense and took some photographs. i suspect a light fall off toward the bottom left but i am not sure. i have posted a smaple picture. is there a sure way of assesing if the lens is suffering from fall off so that i can go for a replacement many thanks

[azn137]

http://en.wikipedia.org/wiki/Vignetting

[PhotoNewt]

Looking at the scene, there is less light on the left bottom corner do to the shadow of the plant - perhaps there is another photo where you can illustrate better what your concern is.

You can always mount your camera on the tripod and point to a white (smooth) target making sure the sensor plane is as parallel as possible to the target. Illuminate the white target evently and take photos at different focal lengths and apertures. Examine the photos to determine if indeed there is a problem with the lens.

[hh28360]

thanks photonewt. i think you are right here is another sample and i think it is quite ok i.e. no light fall - what do you think

[PhotoNewt]

There is no noticeable light fall off issues I can see, there is no vignetting problem either.

BTW, very cute model!

[chanedcomm]

I do not see any noticeable vignetting. Nice pictures by the way...

[JerInTheBox]

Check out the lens reviews on www.kenrockwell.com, he's a Nikon guy like you and does a good job of telling you which lenses have vignetting problems. It's sort of hard to tell in your examples, one is a naturally darker part of the image and the other is sort of blown out by the background light.

I wouldn't worry about it though, as Ken says that stuff only tends to matter to people who spend their time photographing color charts. You can't really see it unless you're looking for it.

[JGennuso]

Adorable picture! Very cute little guy!

[hh28360]

Thank you very much all for your feedback