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Difference Between D50 and D40 , D40x

briantilley

Paignton, UK
30235 posts

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"RE: Difference Between D50 and D40 , D40x"

briantilley Gold Member Deep knowledge of bodies and lens; high level photography skills Donor Ribbon awarded for his support to the Fundraising Campaign 2014 Nikonian since 26th Jan 2003
Sun 22-Jul-12 05:00 PM | edited Sun 22-Jul-12 09:57 PM by briantilley

This is a 4-year-old thread, but it's probably worth pointing out a couple of things - for posterity, if nothing else

It's true that "screwdriver" AF lenses have a pattern of electrical contacts that differs from the AF-S lenses that will not autofocus on the D40, D40X, D60, D3000, D5000, etc. The pattern on AF lenses is one contact, then a gap, then four more contacts. AF-S lenses have no gap and have between 7 and 10 contacts in one group.

Whilst the absence of contacts does mean it's an MF lens, the presence of electrical contacts does not guarantee it's an AF lens. There have been a couple of so-called "Ai-P" manual focus Nikkors (such as the 45mm f/2.8), which have the same "one-gap-four" contact pattern as screwdriver AF lenses.

Lastly, all the top "pro" Nikkors have the same contact patterns as the cheaper, plastic-mount, lenses that you mention. The number of contacts is not an indicator of quality.

Brian
Welsh Nikonian

A topic tagged as having a question Difference Between D50 and D40 , D40x [View all] , louischeng328 , Thu 10-Jan-08 02:56 AM
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