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While one might consider the SLR/c and the 1Ds roughly equivalent technically, you also have to consider the software accompanying each camera. And there, from what I've read, Canon is far ahead. There has never been any question about the image quality of Canon's CMOS sensors while Kodak's image quality has been more difficult to attain. And requires more "tweaking" by its users.
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divegypsy
Don't think I agree with this. Of all the manufacturers, Canon's have traditionally be the ones with the most disappointing bundled software while Kodak's software has consistently been held in the highest regard. If you are talking about software commonly used, CaptureOne and ACR would be the ones. The Kodak support in the current version of ACR (2.1) is outstanding. As I see it, both the Canon and the Kodak have two excellent choices for RAW processing.
Don't agree that there's never been any question about the 1Ds's image quality either. It's known for be sensitive to lens choice and lens sample. It has a tendency to be soft in the perimeter, it has slow sensor and is not particularly known for low noise. I'm not saying it's bad or it's worse than Kodak, just that the full frame Canon has had its share of technical difficulties, too. It's apparently a hard thing to make work properly. Canon, by virtue of its AA filter and lack of "ERI", is easier to shoot with results that are consistent, while Kodak in some situations is problematic with regard to exposure and color aliasing.
I certlainly don't think the two cameras are technical equivalents since the 1Ds is a pro body and I also accept that the 1Ds is easier to get a good image out of than the Kodak. You have to be somewhat more commited to photoshopping with the Kodak but I find it no different conceptually than any other camera.
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1/It's Kodak/Sigma engineered, not Canon. That means the EOS lens mounting system has been reverse engineered, it hasn't been provided by Canon unlike some early Kodak DSLRs which supported EOS lenses. Even if your lenses work OK, it's hard to believe the AF, flash exposure, auto exposure etc can be expected to work as well as the 1Ds.
2/It's slightly smaller than the Nikon mount version - which will probably mean it needs a housing of its own. Good luck finding one. The 1Ds, which has been overwhelmingly popular for a high end DSLR, isn't exactly overwhelmed with housing choices.
3/It's quite ugly. Look at the controls. Build quality, anyone? Kodak reps have commented that this was done to keep the price down.
I think it's going to be good for megapixel junkies who don't venture outdoors much. If you could house it, and you shoot in manual focus anyway, and you don't mind it's somewhat cheap and ugly appearance, it might be the perfect camera.
I don't agree wih point 1. Sigma's been making their own mount for a while and it is similar to the Canon mount. They're also experienced with Canon-mount lenses. This is a no-op.
Obtaining a housing for a new low-volume body is always a problem.
I think ugly is in the eyes of the beholder (or was that ugly goes all the way to the bone? I get the cliches mixed.) Hardly an important consideration underwater.
The SLR/n and SLR/c will make fine outdoor cameras and there's no reason to believe otherwise. Lanscape photography is considered one of their great strengths. Housed, the Kodak has the advantage of being a much lighter and smaller than the pro-body Canons. I'm not sure what the AF point was in the context of underwater shooting. Is there a suggestion that the the Kodak will be an inferior AF body with the same lenses in applications where that is actually important? I'd have a hard time believing that. I rarely use AF for macro anyway.
I certainly agree the 1Ds is a superior camera overall and especially above water. Curious to hear the arguments otherwise.