Vario-Elmarit-SL 24-90mm? Entrance pupil Position?

[vladik]

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Vario-Elmarit-SL 24-90mm? Entrance pupil Position?

 

In the Technical data sheet Entrance pupil Position is given as 24mm: 103.9mm, 90mm: 92.6mm. Would you please let me know as to where is this distance measured from?

 

Thank you,

vlad.ik

[vladik]

FYI:

Replay to my question re. SL 24-90 entrance pupil - I have contacted Leica Technical Department and received following reply:

 

 

The distance in the technical sheet is between the entrance pupil and the bayonet. 

[ramarren]

I presume you need this too set up a nodal Mount for panoramas?

[FlashGordonPhotography]

FYI:

Replay to my question re. SL 24-90 entrance pupil - I have contacted Leica Technical Department and received following reply:

 

 

The distance in the technical sheet is between the entrance pupil and the bayonet. 

That’s interesting. As far as I’m aware every camera I’ve had measured from the focal plane. But Leica do not.

 

Gordon

[vladik]

I presume you need this too set up a nodal Mount for panoramas?

 

Yes, I want to use my LS-24-90 to setup for panorama photography.

Edited March 1, 2018 by vladik

[vladik]

That’s interesting. As far as I’m aware every camera I’ve had measured from the focal plane. But Leica do not.

 

Gordon

Hi Gordon,

It is a bit confusing, Technical data Sheet for M Lenses that I own and use now on SL via adapter:

1.4/50 states Entrance pupil: 25.7mm (related to the first lens surface in light direction).

For M 2.0/75 30.1mm (related to the first lens surface in light direction).

For M 2.8/28 ASPH. it states: Entrance pupil for bayonet: 11.8mm. Perhaps it should read from (typo?) bayonet.

And now the SL 24-90 Entrance pupil is measured from the bayonet, good to know that. I purchased this lens only recently and I am very happy with it.

 

vlad.ik