Comments on: New Canon 40D http://www.donniepinkston.net/2007-09-07/new-canon-40d.html (there are many more like it, but this one is mine) Wed, 07 Jan 2009 13:38:38 +0000 http://wordpress.org/?v=2.5.1 By: donnie http://www.donniepinkston.net/2007-09-07/new-canon-40d.html#comment-8763 donnie Mon, 10 Sep 2007 04:09:18 +0000 http://www.donniepinkston.net/2007-09-07/new-canon-40d.html#comment-8763 Yes, to clarify - as each individual sensing element gets smaller, the noise issue becomes worse. This is most important in astrophotography; a lot of those imaging sensors are significantly lower resolution than what we are used to in normal digital cameras, specifically to avoid noise. (They also frequently have sophisticated cooling systems, the other way to reduce noise.) To create large images of, say, a galaxy, you take many exposures and mosaic them together. I guess mainly because you know the galaxy or nebula will still be there in a few hours! Yes, to clarify - as each individual sensing element gets smaller, the noise issue becomes worse. This is most important in astrophotography; a lot of those imaging sensors are significantly lower resolution than what we are used to in normal digital cameras, specifically to avoid noise. (They also frequently have sophisticated cooling systems, the other way to reduce noise.) To create large images of, say, a galaxy, you take many exposures and mosaic them together. I guess mainly because you know the galaxy or nebula will still be there in a few hours!

]]> By: Ben http://www.donniepinkston.net/2007-09-07/new-canon-40d.html#comment-8762 Ben Mon, 10 Sep 2007 04:00:59 +0000 http://www.donniepinkston.net/2007-09-07/new-canon-40d.html#comment-8762 Hey Donnie, Yeah, the 28-135 is a bit of a dog. The other problem you have is that you're comparing everything to what is traditionally a very, very sharp lens. If that is the Canon 100mm macro, you'll have a hard time finding more than handful of other lenses that match it in sharpness, contrast, or bokeh. As for the "larger sensor" thing, I think you meant "sensors get smaller and smaller." A really large sensor would be much better with noise. Either in the individual or the aggregate sense. :) Hey Donnie,

Yeah, the 28-135 is a bit of a dog. The other problem you have is that you’re comparing everything to what is traditionally a very, very sharp lens. If that is the Canon 100mm macro, you’ll have a hard time finding more than handful of other lenses that match it in sharpness, contrast, or bokeh.

As for the “larger sensor” thing, I think you meant “sensors get smaller and smaller.” A really large sensor would be much better with noise. Either in the individual or the aggregate sense. :)

]]>