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On a D5000, what for is this hook?

imthejavi

MX
2 posts

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imthejavi Registered since 29th Jun 2012
Fri 29-Jun-12 08:57 PM

Hi, I have a concern, I have seen that the camera has a hook on one side of the lens mount, what use is this hook?

Thx, cheers from Mexico Nikonians!

Image ref: http://i.imgur.com/atsyr.jpg

(gancho means hook in spanish)

aolander

Nevis, US
3982 posts

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#1. "RE: On a D5000, what for is this hook?" | In response to Reply # 0

aolander Silver Member Nikonian since 15th Sep 2006
Sat 30-Jun-12 09:57 AM | edited Sat 30-Jun-12 09:57 AM by aolander

I'm not sure of the official name, but it's the "minimum aperture detection lever/switch". When using a lens with an aperture ring, the switch tells the camera that the lens is properly set to the minimum aperture. (Lenses with an aperture ring must be set and locked at their minimum aperture for metering and aperture control to function. You get the "fee" error otherwise.)

Alan

Leonard62

Pa, US
4419 posts

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#2. "RE: On a D5000, what for is this hook?" | In response to Reply # 1

Leonard62 Gold Member Awarded for excellent contributions and sharing his in-depth knowledge and experience with the community, especially of Nikkor Lenses Writer Ribbon awarded for his contributions to the Nikonians Resources articles library Nikonian since 15th Mar 2009
Sat 30-Jun-12 12:26 PM

It appears that any of the dslr's that don't have the AI metering lever have this switch. That includes the D40, D50, D60, D3000 and D5000 series bodies.

What I find interesting is that all manual focus lenses with AI, AIS or factory AI conversion kits also activate this switch when at minimum aperture. However I have not found any Nikon body that makes use of this feature when using a manual focus lens. That includes film bodies as well. So either Nikon has a function they thought of in 1976 and haven't implemented yet or the function they thought of was dropped. I just find that interesting.

Len

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imthejavi

MX
2 posts

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#3. "RE: On a D5000, what for is this hook?" | In response to Reply # 2

imthejavi Registered since 29th Jun 2012
Sun 01-Jul-12 12:33 AM

Alan, Len:

Thank you so much for your help, i have the d5000 since a year ago and a few days ago i was wondering what for is that thing.

I will now search more about those types of lens type.

Again, thank you for your support. Cheers from Mexico!

G