20D, 28-135 IS & noise

[SDJNJ]

I just got my 28-135 IS lens & camera. I had the ISO set at 800 at low-light (sun starting to go down). I was disappointed with the noise in the images. I found the lens to be wonderful at lower ISO & of course, sunshine!! Has anyone else with this lens had the same experience?

[SDJNJ]

I just got my 28-135 IS lens & camera. I had the ISO set at 800 at low-light (sun starting to go down). I was disappointed with the noise in the images. I found the lens to be wonderful at lower ISO & of course, sunshine!! Has anyone else with this lens had the same experience?

[watermarkphotography]

I'm no pro but I think your going to get noise with a high iso setting. Try around 100-200.

[Jim_T]

The lens has nothing to do with image noise..

Noise is introduced by the electronic circuitry that amplifies the signals produced by light falling on the sensor sites.

More amplification = Higher ISO = More noise.

Actually.. The 20D is a bit better than the older 10D and 300D when it comes to noise at 800 and 1600 ISO..

[tim]

From the sample images i've seen the 20D is a LOT better than the 10D/300D, almost a reason to upgrade in itself. Almost...

[Citizensmith]

Noise has nothing to do with the lens and everything to do with the ISO you set. On a 20D ISO 800 is where the noise starts to become noticable. It'll be there whether you use your 28-135 or a 600 f/5.6 L.

Personally I don't find the ISO800 noise from my Rebel D to be that bad at all and the 20D is supposed to be better than the Rebel. If you could post an example (with the exif data still intact) we could look and tell you if its any worse than youd normally expect.

[Olegis]

Personally, I think that we, the Canon DSLR shooters, are very spoiled people - just look at the results of an 800 ASA film to understand what I'm talking about. The noise the current cameras produce is so much better that high-sensitivity film grain - it's almost amazing. I've made hundreds of pictures at ISO 1600, which came out pretty nice after some noise-removal treatment.

[pierrot]

Haha, I fully agree with Oleg: we all (tend to) behave as if we never used film before. Just have a look back to the pictures you made some years ago on pushed films (negs or slides); you'll be astonished! :D

[slejhamer]

If you underexpose your high-ISO images, the noise (especially in the shadow areas) will look worse than if you had "exposed to the right" of the histogram. From what I can tell, underexposing an ISO 800 image by a full stop gives worse noise than if you had bumped ISO up by a stop to 1600 for proper exposure. Even an ISO 200 image can look quite poor if underexposed. Search forum member Roger Cavanagh's site for some examples.