AI/AIS lenses on D200 etc

On Thu, 7 Dec 2006 0:35:49 +0000, VX wrote
(in message <0001HW.C19D1265001DE662F0284530.DeleteThis@news.claranews.com>):

> But can anyone tell me- is there any advantage to AIS lenses over AI lenses
> on the D200? Or is it simply an irrelevance?

Woops- I should probably clarify this- I'm talking about manual focus
Nikkors, where AI and AIS are alternatives to one another (amongst used
lenses that is).

--
VX (remove alcohol for email)
 >> Stay informed about: AI/AIS lenses on D200 etc 

On Wed, 6 Dec 2006 23:43:03 +0000, Jim wrote
(in message <bAIdh.8439$wc5.1408@newssvr25.news.prodigy.net>):

> The AF lenses that have a mechanical diaphragm are also AIS lenses. The AF
> cameras need the changes made between AI and AIS to perform the matrix
> metering.
> Jim

Ah yes, that makes sense.

But can anyone tell me- is there any advantage to AIS lenses over AI lenses
on the D200? Or is it simply an irrelevance?

--
VX (remove alcohol for email)
 >> Stay informed about: AI/AIS lenses on D200 etc 

VX <vastorex DeleteThis @whiskeyyahoo.co.uk> writes:
> But can anyone tell me- is there any advantage to AIS lenses over AI lenses
> on the D200? Or is it simply an irrelevance?

AI might not support program mode as accurately.
 >> Stay informed about: AI/AIS lenses on D200 etc 

VX wrote:
> On Thu, 7 Dec 2006 0:35:49 +0000, VX wrote
> (in message <0001HW.C19D1265001DE662F0284530.DeleteThis@news.claranews.com>):
>
>> But can anyone tell me- is there any advantage to AIS lenses over AI lenses
>> on the D200? Or is it simply an irrelevance?
>
> Woops- I should probably clarify this- I'm talking about manual focus
> Nikkors, where AI and AIS are alternatives to one another (amongst used
> lenses that is).
>
AFAIK the answer is no.
The AIS difference over plain AI is a groove cut in the lens mount back
surface to varying depths according to focal length.
The Nikon FA had a corresponding probe - that looks much like the end of
a ball point pen, that measured the depth of the AI-S hole, and used
that information in calculating the longest exposure that it's program
mode metering would allow. (P mode still worked on AI lenses on the FA,
but I don't recall what the longest exposure was set to when the camera
didn't know the focal length of lens used)
So, the "S" in AI-S was rendered obsolete by AF lenses that have an
electronic chip in them instead.
So, it makes no difference for a D200 whether the lens is AI, or AI-S.
But some lenses were redesigned when they changed to AI-S. One example
that I know of was the 28mm f2.8. The AI version (which I owned) was
not very good by todays standards. The AI-S version is reported to be
much better.
 >> Stay informed about: AI/AIS lenses on D200 etc 

"frederick" <lost.TakeThisOut@sea.com> wrote in message
news:1165456553.291097@ftpsrv1...
> VX wrote:
>> On Thu, 7 Dec 2006 0:35:49 +0000, VX wrote
>> (in message <0001HW.C19D1265001DE662F0284530.TakeThisOut@news.claranews.com>):
>>
>>> But can anyone tell me- is there any advantage to AIS lenses over AI
>>> lenses on the D200? Or is it simply an irrelevance?
>>
>> Woops- I should probably clarify this- I'm talking about manual focus
>> Nikkors, where AI and AIS are alternatives to one another (amongst used
>> lenses that is).
>>
> AFAIK the answer is no.
> The AIS difference over plain AI is a groove cut in the lens mount back
> surface to varying depths according to focal length.
> The Nikon FA had a corresponding probe - that looks much like the end of a
> ball point pen, that measured the depth of the AI-S hole, and used that
> information in calculating the longest exposure that it's program mode
> metering would allow. (P mode still worked on AI lenses on the FA, but I
> don't recall what the longest exposure was set to when the camera didn't
> know the focal length of lens used)
> So, the "S" in AI-S was rendered obsolete by AF lenses that have an
> electronic chip in them instead.
> So, it makes no difference for a D200 whether the lens is AI, or AI-S. But
> some lenses were redesigned when they changed to AI-S. One example that I
> know of was the 28mm f2.8. The AI version (which I owned) was not very
> good by todays standards. The AI-S version is reported to be much better.
Yes, I know about the groove, etc. However, I understood that the only real
difference is that there is a more linear relationship between the lever and
the diaphram on the AIS lenses. I don't own any AI lenses anyway. The F3
doesn't care about such fine distinctions.

Jim
 >> Stay informed about: AI/AIS lenses on D200 etc