Quick metering question on the MP

[naos]

I know it's TTL, but what kind of system does it use? Spot, Center-weighted, Average, Partial or other?

 

[c.poulton]

Exposure metering through the lens (TTL), selectively with working aperture. Metering principle The light reflected
by a metering spot in the center of the first shutter curtain. The metering spot has a diameter of 12 mm and thus
corresponds to approx. 13% of the full film format or approx. 2/3 of the short side of the applicable bright line frame
in the viewfinder. Metering range (for ISO 100/21°) From 0.03 to 125000 cd/m2 at room temperature, normal humidity
and f/1.0. For ISO 100/21° this corresponds to EV-2 to 20 or f/1 and 4s (B setting) to f/32 and 1/1000s.
Flashing of the left-hand triangular LED in the viewfinder indicates that the brightness reflected is below the metering
range. Metering cell Silicon photodiode with focusing lens to the top left behind the bayonet.

Just copied from the Leica web site - MP technical specs. Hope it helps?

 

[BennyC]

Lens factor?

Lens factor?

Hmmmm, doesn't the angle of the lens help with that?

I tend to be on a 'spot' mode when I use a 75mm to 90mm and an overall mode with the 24mm.

Be it light read off from the white circle.

 

[Mackinaw]

I remember seeing a picture of the M6 metering pattern, years back, in the the late-lamented American camera magazine, Modern Photo. It's probably best describd as a "big, fuzzy, round spot." Thinking this way seems to give me good results with my MP.

Jim Bielecki

 

[abenner]

#1 - All metered Leica M's are TTL in that the meter is inside the camera, but don't confuse the MP metering with the M6TTL, because they're not the same, in that the MP only flash sync's at 1/50.

#2 - See the white spot on the shutter curtain? (Look with the lens off.) That's your maximal metering zone - center, circular. Light through the lens reflects off that white spot onto a meter, which I believe is above the lens mount, obviously facing that spot.

#3 - If I recall, the MP manual, availabe for free download on Leica's website, shows nice pictures of the metering zone with several different focal lengths. Pictures are worth a thousand words.

 

[Mackinaw]

#1 - All metered Leica M's are TTL in that the meter is inside the camera, but don't confuse the MP metering with the M6TTL, because they're not the same, in that the MP only flash sync's at 1/50.

Not true. Flash sync for the M6TTL is also 1/50th second.

 

[abenner]

Sorry, I guess I should say that in the MP, TTL flash control has been removed. In other words, with respect to having a flash on the camera, the MP is like an M6 classic and not an M6TTL.

 

[JNewell]

I remember seeing a picture of the M6 metering pattern, years back, in the the late-lamented American camera magazine, Modern Photo. It's probably best describd as a "big, fuzzy, round spot." Thinking this way seems to give me good results with my MP.

Jim Bielecki

I'm looking at a copy of that test report (published in June 1985) as I type this. It's pretty close to what we'd call "center-weighted averaging." Modern called it "heavy center-weighted averaging." This surprised me when I first saw the diagram. The metering cell must be picking up a fair bit of light reflected off the black portion of the shutter curtain.

 

[Mackinaw]

I'm looking at a copy of that test report (published in June 1985) as I type this.

Not that I'm in the habit of saving old camera magazines, but I may have this issue. If so, I'll scan the picture and will attach in another post.

Jim Bielecki

 

[JNewell]

Not that I'm in the habit of saving old camera magazines, but I may have this issue. If so, I'll scan the picture and will attach in another post.

Jim Bielecki

Heh, I admit that I do (save old photo mags - at least a few). If you don't find it, I'll do it.

 

[Mackinaw]

Holy smokes, I found it. Haven't seen this in years and admit to being a bit surprised by what Moden Photo measured.

Whatever, see the attachment.

Jim Bielecki

 

[JNewell]

Thanks! You are a better (or at least a faster 😉 ) man than I am!

 

[naos]

Thanks Mackinaw. I've also confirmed this with my dealer. It is indeed center weighted averaging.

 

[Magus]

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