Why D400 and not D600

Started Sep 27, 2012 | Discussions thread
n057
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Re: Why D400 and not D600
In reply to RezaTravilla, Oct 26, 2012

RezaTravilla wrote:

Using tele converter such 0.45x makes the F double. So if the max F is 2.8, it will become F5.6. This make speed slower although it gave additional length. DX is automatic extend the focal length without tele converter. Meanwhile if we use FX we need tele converter.

While I prefer DX also, going from one f-stop to the next, you double (or halve) the amount of light, you do not double the f-stop. In this particular exemple, a f/2.8 lens will end up as a f/4, not as f/5.6.

JC
Some cameras, some lenses, some computers

 n057's gear list:n057's gear list
Nikon Coolpix 995 Nikon D200 Nikon AF-S Nikkor 70-200mm f/2.8G ED VR Nikon AF-S DX Nikkor 35mm f/1.8G Nikon AF-S DX Nikkor 17-55mm f/2.8G ED-IF +6 more
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