Mamiya 7 rangefinder off?

Hello all.

On my recent vacation I was using my 150 mm lens on my Mamiya 7. I
noticed that if I turned the lens all the way to infinity the
rangefinder actually indicated that the focus was PAST infinity. I
actually had to turn back a touch from infinity to get the rangefinder
to line up. I was focusing on mountaintops several miles away. Is
infinity properly focused at the stop or based on what the rangefinder
shows? can this camera focus past infinity for some reason? thanks. I
recently had to have the camera's film advance repaired and the repair
sheet said they alligned the rangefinder. It did this prior to the
repair also.

-Josh

In article .com,
Josh wrote:
Hello all.

On my recent vacation I was using my 150 mm lens on my Mamiya 7. I
noticed that if I turned the lens all the way to infinity the
rangefinder actually indicated that the focus was PAST infinity.

Don't know about the 150mm, but my 43mm certainly has the endstop *at*
infinity. It may be that your lens goes slightly past, or (more likely),
your rangefinder has drifted a bit. Suggest you take a couple of frames of
very distant objects with the lens wide-open, one with the rangefinder
lining up, and one with the lens against the end-stop. That should tell you
if it's the rangefinder, or the lens.

if it's the lens, don't worry about it. If it's the rangefinder (likely),
you may want to adjust it, depending on how far it is off. Personally, I'm
willing to tolerate a little "slack" in a rangefinder, as long as the error
is well within the DoF I usually want. I have a 35mm Bessa R which is
slightly off, but so little that it's not worth my time to try and get it
bang-on.

Getting back to the 7, I've not had to adjust mine, but I understand they
are user-adjustable, with some care. Google is your friend here.

In article .com,
Josh wrote:
Hello all.

On my recent vacation I was using my 150 mm lens on my Mamiya 7. I
noticed that if I turned the lens all the way to infinity the
rangefinder actually indicated that the focus was PAST infinity.

Don't know about the 150mm, but my 43mm certainly has the endstop *at*
infinity. It may be that your lens goes slightly past, or (more likely),
your rangefinder has drifted a bit. Suggest you take a couple of frames of
very distant objects with the lens wide-open, one with the rangefinder
lining up, and one with the lens against the end-stop. That should tell you
if it's the rangefinder, or the lens.

if it's the lens, don't worry about it. If it's the rangefinder (likely),
you may want to adjust it, depending on how far it is off. Personally, I'm
willing to tolerate a little "slack" in a rangefinder, as long as the error
is well within the DoF I usually want. I have a 35mm Bessa R which is
slightly off, but so little that it's not worth my time to try and get it
bang-on.

Getting back to the 7, I've not had to adjust mine, but I understand they
are user-adjustable, with some care. Google is your friend here.

Josh wrote:

On my recent vacation I was using my 150 mm lens on my Mamiya 7. I
noticed that if I turned the lens all the way to infinity the
rangefinder actually indicated that the focus was PAST infinity.

So develop the film and see if the rangefinder was off.
Or shoot a new roll ASAP.

Josh wrote:

On my recent vacation I was using my 150 mm lens on my Mamiya 7. I
noticed that if I turned the lens all the way to infinity the
rangefinder actually indicated that the focus was PAST infinity.

So develop the film and see if the rangefinder was off.
Or shoot a new roll ASAP.

I heard of this in other news groups. Apparently some of the 150mm lens can
suffer from this. It's not the camera. You do need to pull back from the end
a tocuh and use the infinity mark.

Phil Fairman.

"Josh" wrote in message
oups.com...
Hello all.

On my recent vacation I was using my 150 mm lens on my Mamiya 7. I
noticed that if I turned the lens all the way to infinity the
rangefinder actually indicated that the focus was PAST infinity. I
actually had to turn back a touch from infinity to get the rangefinder
to line up. I was focusing on mountaintops several miles away. Is
infinity properly focused at the stop or based on what the rangefinder
shows? can this camera focus past infinity for some reason? thanks. I
recently had to have the camera's film advance repaired and the repair
sheet said they alligned the rangefinder. It did this prior to the
repair also.

-Josh

Wait so I'm confused. Do I use the infinity mark (right at the stop) or
do I "pull back" to where the rangefinder says I should be? I have not
yet tried a new roll of film since I've been home. Been busy.

-Josh

Wait so I'm confused. Do I use the infinity mark (right at the stop) or
do I "pull back" to where the rangefinder says I should be? I have not
yet tried a new roll of film since I've been home. Been busy.

-Josh

Josh,

Sorry, just trying to relate what I have read. Better to give you pointers
to the articles themselves. My 150mm & M7II don't have this problem.
Thinking further, it may also be your camera range finder adjustment too.
That process actually adjusts the rangefinder to focus at infinity.

Check these two out and hopefully they may help more than I did:

150mm focuses past infinity:
http://www.photo.net/bboard/q-and-a-...?msg_id=009n6b

Adjustment:
http://gorgon.tomwestbrook.com/Photo...inder_adj.html

Phil


"Josh" wrote in message
oups.com...
Wait so I'm confused. Do I use the infinity mark (right at the stop) or
do I "pull back" to where the rangefinder says I should be? I have not
yet tried a new roll of film since I've been home. Been busy.

-Josh

Josh,

Sorry, just trying to relate what I have read. Better to give you pointers
to the articles themselves. My 150mm & M7II don't have this problem.
Thinking further, it may also be your camera range finder adjustment too.
That process actually adjusts the rangefinder to focus at infinity.

Check these two out and hopefully they may help more than I did:

150mm focuses past infinity:
http://www.photo.net/bboard/q-and-a-...?msg_id=009n6b

Adjustment:
http://gorgon.tomwestbrook.com/Photo...inder_adj.html

Phil


"Josh" wrote in message
oups.com...
Wait so I'm confused. Do I use the infinity mark (right at the stop) or
do I "pull back" to where the rangefinder says I should be? I have not
yet tried a new roll of film since I've been home. Been busy.

-Josh