Contax G 45mm F2: diafragm numbers misaligned

txomin

Mu-43 Regular
Joined
Apr 12, 2010
Messages
38
Location
Bilbao, Spain
With diafragm full opened, it is betwen 5,6 and 8, and when I full close, it goes some clicks after 16. Is it normal? I'm waiting the adapter, so I can't try it.
 

Streetshooter

Administrator Emeritus
Joined
Dec 15, 2009
Messages
5,138
Location
Phila, Pa USA
No, this is not normal.
There may be a small screw on the ring.
Loosen it slightly and then you can align the ring to the fstop.
 

Jonas B

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Joined
Apr 23, 2010
Messages
91
Location
Gothenburg, Sweden
With diafragm full opened, it is betwen 5,6 and 8, and when I full close, it goes some clicks after 16. Is it normal? I'm waiting the adapter, so I can't try it.
Don't tamper with the lens. It's fully normal. When you mount the lens and the adapter everything will be fine and as expected. This has to do with the somewhat complicayed mount Contax made for the G series cameras and lenses. You are not really twisting the lens when mounting it but rather the first ring (= the ring most close to the mount) when mounting it.

So, wait for the adapter and don't worry.

/Jonas
 

dbloewen

New to Mu-43
Joined
Mar 15, 2010
Messages
5
I noticed the same thing on a Contax G 45mm f2 I recently purchases. I am waiting for the adapter also. The seller advised me that the apparent misalignment of the aperture ring is normal and will correct itself when mounted. He also emphasizes not to mount the lens by holding it near the base where that black hump is (the mechanism that hold the focusing screw).
*HOLD THE LENS BY THE KERNELLED RING JUST ABOVE THE BASE when you mount it or you can damage it. I have check elsewhere on the web to confirm this.
 
M

mabelsound

Guest
No, this is not normal.
There may be a small screw on the ring.
Loosen it slightly and then you can align the ring to the fstop.
Oh goodness no don't do that!!!!!!

I once bought one incredibly cheap because the seller thought this was not normal...
 

Streetshooter

Administrator Emeritus
Joined
Dec 15, 2009
Messages
5,138
Location
Phila, Pa USA
It's not a sidetrack...we're all shooters here...
Besides, the Jupiter can be adjusted in about 30 seconds....
The Copy I have which I've had since the early 70's is great. It's about the smallest 50mm you can find. It's not a Summicron, It's not a Summilux...it's about as good as an old Summarit.
I like it....in fact I like it more now than I ever did. Digitally it's really a nice compact performer.
Besides my wife is Russian and she loves when I use it....
It works best without filters on front...not much flare...contrast is very pleasing...
a little soft wide open on the edges but clears up at 2.8 and at 4.0...beautiful....
No click stops so on the Pens..it's great just to stop down and watch your DOF come to where you want it...
I never know what fstop I'm at but it's what I see that matters not the math....

shooter
 

next61

Mu-43 Regular
Joined
Apr 22, 2010
Messages
37
I thought the same when I got my 45 from KEH but after I spoke with them, it was clear that the f-stops will align... I pulled my screwdriver for an "adjustment" and I stopped just in time, before I "fix it"!
 
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