Andre Labonte Offline Upload & Sell: Off
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Kerry Pierce wrote:
Yes, but.... Why are DX lenses as big as FX lenses? Does the flange to sensor distance need to be different to produce smaller lenses?
Thom says " On the other hand, smaller sensor cameras produce smaller useful lens sets (notice I didn't write "equivalent lens sets")."
So, where is the savings in size and weight? I've read, many times, that the only thing they do to make a DX lens is change the components/lens groups at the bottom of the lens to produce the appropriate image circle. True?
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Hi Kerry,
DX lenses are generally smaller than their FX counter-parts if they share the same "range of FOV" when mounted on their respective formats. The issue is that there are not to many DX lenses outside the kit lenses and few share the same FOV with an FX equivalent. This is the big issue where Nikon has not supported DX.
For instance ... where is the 27-133 f/2.8 DX ? Surely that would be smaller and lighter than a 70-200 f/2.8 FX
Another for instance ... my 17-55 f/2.8 DX is the FOV equivalent of 25-83 f/2.8 on FX an is smaller than the 24-70 f/2.8 FX and honestly the 17-55 need not be a big as it is ... Tamron proved that.
One good one is to compare the 18-200 vs. the size of the 28-300
The second issue is the flange diameter. For FX, you can't get much smaller than the F-mount due to the needed size of the back element to cover FX. On DX, the flange could have been made much smaller ... but it was not due to the desire to share the legacy F-mount glass ... besides, the size savings due focal length shift for tele lenses and less dispersion needed for the rear elements of UWA lenses is the bigger of the two contributions to size
Cheers,
Andre
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Andre Labonte wrote:
Makes me wonder if the D400 will be mirrorless.
I hope not. I'm not ready for mirrorless until the technology is faster/better than an OVF and the battery consumption isn't OTT.
As to the question of which will come first, the 7dmkII or the d400, my guess is that Nikon will wait on the leader to show them the way.
Kerry
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Kerry,
... those are my two concerns as well ... once they improve the speed and accuracy of the EVF and manage good battery life, I'm good with a mirrorless ... otherwise give me an OVF .... maybe wait for EVF until the D500
Cheers,
Andre
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