BJP Article on Full sized sensor vs APS with Canon L lens

Started Mar 11, 2005 | Discussions thread
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John W Peterson Senior Member • Posts: 2,737
BJP Article on Full sized sensor vs APS with Canon L lens

I post this here, because a lot of folks have climbed on board with the line of reasoning that says that full sized sensors are the way to go. The theory being that the larger pitch size should produce that the greatest signal to noise ratio. This argument of course presumes that this physical principal always represents the "limiting factor".

A technical article in the 02/03/05 issue of the British Journal of photography by Anders Uschold looks in detail at the implications of using high end canon glass (EF17-40 f4, 24-70 f2.8, 70-200 f2.8 and70-200 f4 - all L lens's) on a 1Ds Mark 2. He shows that corner shading is substantial AND that resolution declines substantially as you move away from center field. He points out that the 17-40 is well known for good performance with APS sized sensors, but that their sweet spot simply doesn't hold up to the "full frame sensor"

Basically his findings support and expand upoun the findings of Bjorn Rorslett - showing not only the vignetting effect of the full frame sensor - even with excellent lens's, but also the substantial decline in resolving power as we move away from center - compared to APS sensors.
This issue previews an upcoming article on the debate around sensor size.

Bottom line - Nikon isn't slow or foolish in supporting the APS sensor. There are quite solid technical arguments, and emperical observations that support this conclusion.

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