50mm Summilux - f stop data missing?

[LondonL]

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Hi all,

Received my new 50mm summilux yesterday and it’s stunning! 
 

However, when importing into Lightroom the aperture f stop numbers are incorrect! For example the images I’ve shot at f/1.4 are being shown as f/1.0 and this is happening all up the aperture range. Additionally when I connect to the remote shooting via Leica fotos app the f stop number box is blank. Just shows nothing, but it is showing correct iso and shutter.

Any ideas what is going on?

[a.noctilux]

Which camera you are using ?

 

[LondonL]

Just now, a.noctilux said:

Which camera you are using ?

 

M10

It’s auto detecting the correct lens 1.4 / 50

[tom.w.bn]

Leica M lenses have no electonical contacts to inform the camera about the aperture. It's purely mechanical. The camera can only guess what aperture is probably set right now.

[a.noctilux]

double post

Edited January 15, 2022 by a.noctilux

[a.noctilux]

5 minutes ago, LondonL said:

M10

It’s auto detecting the correct lens 1.4 / 50

Strange.

Strange, if your lens is coded.

Can you test this with manual select one of 50 Lux lens ?

Edited January 15, 2022 by a.noctilux

[pippy]

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55 minutes ago, a.noctilux said:

Strange. Strange, if your lens is coded. Can you test this with manual select one of 50 Lux lens ?

I'm not so sure it's all that strange, Arnaud. Is there part of the camera's software which links the exposure window' approximation with the 6-bit coding? When I manually code my LLL 8 Element as a 35 Summicron I occasionally get a guesstimate aperture setting of f1.7 even when the data associated with the DNG file correctly identifies the inputed code as being an f2 lens.

Philip.

Edited January 15, 2022 by pippy

[a.noctilux]

Philip, thanks for clarification.

The OP ( post 1 ) wrote F/1.0 all aperture range.

The camera can guesstimate wrong but would not register F/1.0 at all aperture.

 

Maybe something wrong or old software, as I remember that old version of M10 had no aperture guesstimation at all.

 

For more investigation,

@LondonL can you provide your M10 software version ?

 

[LondonL]

1 hour ago, a.noctilux said:

Philip, thanks for clarification.

The OP ( post 1 ) wrote F/1.0 all aperture range.

The camera can guesstimate wrong but would not register F/1.0 at all aperture.

 

Sorry, this was meant to read to say that at every f stop I shoot at, it gives the wrong f stop data. Not that all apertures are showing f/1.0

Ok, so there is nothing wrong here. You pay best part of £9k for a camera and lens, and it can’t give you correct exposure data 🤷‍♂️

[LocalHero1953]

3 minutes ago, LondonL said:

Sorry, this was meant to read to say that at every f stop I shoot at, it gives the wrong f stop data. Not that all apertures are showing f/1.0

Ok, so there is nothing wrong here. You pay best part of £9k for a camera and lens, and it can’t give you correct exposure data 🤷‍♂️

You pay the best part of £9k for a camera without knowing its principles of operation????

[a.noctilux]

So good, nothing wrong, then 😉.

 

How that not giving correct exposure data ?

Those are one of the weird M behaviors, not avoiding good picture taking experiences.

 

You would find others weird things, later,

 

so why on the first M10 firmware, Leica did not put the guesstimated "data" (lens aperture in use ).

With users requests, Leica did add at newer firmware.

 

Edited January 15, 2022 by a.noctilux

[LondonL]

Glad to know there is nothing wrong, I’m only a year into my Leica M digital journey, still learning everyday. Just surprised it took me a year to realise this!

Doesnt get in the way of the amazing photography, plus that 50mm summilux is something else. Just wow. 

[Jean-Michel]

Of course, one could always return to carrying a notebook in where  one would record exposure time, aperture, frame number, location or subject, and even a note for plus or minus development time when using sheet film. I have a stack of those! 
The accurate aperture data from most digital cameras, or the always inaccurate guess from digital Ms is interesting but essentially unimportant. 

[a.noctilux]

Notebook,

voice annotation in camera also lost 😇

I still have one of those Canon EOS 1D launched in 2001 (link to Wikipedia) 4.15 Mpix 1.3 crop which has this feature ..." The 1D also included a microphone for voice annotation "

with also these nice functions 21 years ago :

• The only Canon SLR (film or digital) to have an X-sync speed of up to 1/500 of a second.
• The only Canon SLR (film or digital) to have a shutter speed of up to 1/16000 of a second.

[Jean-Michel]

And a shelf of  binders containing sketches of print enlargements showing paper type, contrast, burning, dodging areas and time, enlargement size, development time, toning, etc. etc. All that information now neatly recorded by History in Lightroom, Life is good!

[LondonL]

1 hour ago, Jean-Michel said:

Of course, one could always return to carrying a notebook in where  one would record exposure time, aperture, frame number, location or subject, and even a note for plus or minus development time when using sheet film. I have a stack of those! 
The accurate aperture data from most digital cameras, or the always inaccurate guess from digital Ms is interesting but essentially unimportant. 

To you maybe, for me there are times I’d like to know the aperture I shot something at. Not much to ask

[LocalHero1953]

31 minutes ago, LondonL said:

To you maybe, for me there are times I’d like to know the aperture I shot something at. Not much to ask

It's just one of those little ways that Leicas choose to bite you when you're least expecting it. There will be others to be encountered🙂

[Stef63]

4 hours ago, a.noctilux said:

Notebook,

voice annotation in camera also lost 😇

I still have one of those Canon EOS 1D launched in 2001 (link to Wikipedia) 4.15 Mpix 1.3 crop which has this feature ..." The 1D also included a microphone for voice annotation "

with also these nice functions 21 years ago :

• The only Canon SLR (film or digital) to have an X-sync speed of up to 1/500 of a second.
• The only Canon SLR (film or digital) to have a shutter speed of up to 1/16000 of a second.

Oh yes ! Loved that camera and also still have it together with later iterations of the original 1D on display in my office with my old film Canon & Minolta bodies.  Good times.