Hello.
I just bought a Leica M2 and it came with a meter MR-4. Explendid machine indeed. My question is: how is this meter accuracy? Is it good if proporly calibrated
And with a new battery. Just curiouse before I use it.
Oh, and a 50 Summilux type I, very nice combo IMO. Never will forgive myself from selling my M6, so I bought this one. 10 times better. Ehehehhehe
Thankx to all in advance.
In fact all second hand MR-4 meters need a CLA.
😎
After that it is a fine and reliable meter.
In helping my friend secure an MR-4 for his non-metered M's, I've gotten hold of several of them in working/accurate condition and discovered something interesting:
Checking the readings at the low, mid and high ends of the brightness range, I have found no variation between the following (voltages tested on a meter):
a new (never used) PX625 1.3V Mercury battery
a new PX625-A 1.5V Alkaline battery
a new MS76 1.55v Silver-Oxide battery in a CRIS MR9 1.3v adaptor
a new MS76 1.55v Silver-Oxide battery in a washer-spacer (left over from a Wein cell).
I did not have the same results when I tried this with a Leicaflex SL, M5 or CL, all of which required compensation with a 1.5v and then would still not read accurately at both ends of the brightness range.
Could it be that the MR-4, made by Metrawatt, has a built-in voltage regulator that nobody knows about? I'm reluctant to open these meters since I don't own them, and wouldn't know what I was looking at if I did. Just curious if anybody else has checked an MR4 with different battery types and found the same thing. I don't mean the readings are close, they're *identical*. BTW for using the MR9 adaptor I would recommend a 386 vs an MS76 because the latter is thicker and pushes the battery door open a little--and those battery doors don't look like they're too strong.
http://www.l-camera-forum.com/leica-...s/2/50437.html