Archive 2014 · AFMA & multiple Tamron/Sigma lenses on D810 and D750

slrl0ver
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p.1 #1 · p.1 #1 · AFMA & multiple Tamron/Sigma lenses on D810 and D750

I'm thinking seriously of a D750 and pairing it with a few Tamron and Sigma lenses. At one point there were reports D600 and D800 would use the same AFMA value for any Tamron or Sigma mounted lens and wouldn't distingush say a Tamron 24-70 vs. a Tamron 70-200. Anyone know if this occurs with a D750 or D810?

http://forum.nikonrumors.com/discussion/1380/problem-with-tamron-lenses-on-d800/p1

- slrl0ver

Oct 13, 2014 at 11:07 PM

johnctharp
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p.1 #2 · p.1 #2 · AFMA & multiple Tamron/Sigma lenses on D810 and D750

The conversation in the linked thread makes it seem like the issue is on Tamron's side, where they aren't encoding their lenses with the appropriate EXIF data for the camera to differentiate them.

Oct 14, 2014 at 08:22 AM

slrl0ver
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p.1 #3 · p.1 #3 · AFMA & multiple Tamron/Sigma lenses on D810 and D750

Hi John,

That would be my guess too, or maybe the Nikon body decides it won't do different AFMA if the lens is not reported as a Nikon brand lens (intentional or accidental).

Regardless, I'm really interested to know if this persists with D750 and D810.

- slrl0ver

Oct 14, 2014 at 08:47 AM

mawz
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p.1 #4 · p.1 #4 · AFMA & multiple Tamron/Sigma lenses on D810 and D750

The issue is the lens ID that is communicated to the body. All Nikon CPU lenses have a unique ID. Tamron reuses their ID's regularly. AFMA uses the lens ID to determine which settings apply. Hilarity ensues.

Oct 14, 2014 at 11:32 AM

slrl0ver
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p.1 #5 · p.1 #5 · AFMA & multiple Tamron/Sigma lenses on D810 and D750

mawz,

You're implying the problem persists on D750/D810 since the lens ID Tamron is using isn't unique per lens family even (let alone per lens)? Out of curiosity, are you in touch with Tamron about this issue?

Sigh. It's possible to hack something together to work around this based off the information here:

https://nikonhacker.com/wiki/Lens_Serial_Interface
&
https://nikonhacker.com/viewtopic.php?f=8&t=1437

but what a waste of time...

- slrl0ver

Oct 14, 2014 at 02:19 PM

mawz
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p.1 #6 · p.1 #6 · AFMA & multiple Tamron/Sigma lenses on D810 and D750

slrl0ver wrote:
mawz,

You're implying the problem persists on D750/D810 since the lens ID Tamron is using isn't unique per lens family even (let alone per lens)? Out of curiosity, are you in touch with Tamron about this issue?

- slrl0ver

The problem is on the lens side, so it affects all SLR's (yes, this issue exists on A and EF mounts as well). It normally is only an issue with properly identifying lens metadata, but also affects AFMA.

This isn't unique to Tamron either. Sigma actually used to be worse for this, but they seem to have gotten their act together of late.

I'm actually more familiar with the issue as it affects A mount than F mount.

Oct 14, 2014 at 02:29 PM


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