Seiko Shutter Accuracy for C330 over time?
Charles Pezeshki
into my mind.
How well do the Seiko shutters on Mamiya TLR lenses keep their accuracy over
time?
A few background facts re: this question. #1., I am a newbie, with a
recently purchased C330F. #2., I am planning on going out for two months
this summer in the field with my camera, and shooting pix for a book. If my
shutters are in good shape now, catastrophe notwithstanding, what are the
odds that they will be in good shape by the end of the summer? I will
probably not shoot more than two rolls of film each day, averaged.
Chuck Pezeshki
GLMeador
time? >>
Season's Greetings, Chuck!
My shutters on the lenses for the Mamiya TLR held up well, but condition
depends a lot on the environment in which they are used.
Extreme temperatures can cause problems as heat liquifies the lubricants and
allow them to go to undesirable places, but cold temperatures will increase the
viscosity and slow the shutter. Dirt can mix with the lubricants to from
unwanted sludges. Look at the shutter blades on both sides to be sure there is
no sign of oily residue.
Shutters can drift in accuracy. For example, 1/500 might actually be 1/425,
etc. This is more critical at the faster speeds. As long as the speed set is
CONSISTENT, there is no real problem as you can compensate for a small error in
actual speed through exposure adjustments. An inconsistent shutter speed is
unacceptable as every shot will be a guess on correct exposure.
A test roll shot of an even subject, like clear blue sky, can be useful. Shoot
the SAME exposure with different combinations of shutter speed and aperture.
Shoot two images at each selected shutter speed to check for consistency. Each
frame should look alike with the same density.
While a test roll of film can check for major problems, only a repair facility
with a shutter tester can check and correct your gear.
Hope this helps.
Gary L. Meador
Odessa, TX
Stephe
>
> After reading the somewhat contentious Rollei 6000 thread, a question popped
> into my mind.
>
> time?
>
>
thing. The problems arise when they sit around unused and the lubricant
gets "gummy"... But if I was going on a trip and needed to be sure the
shutters weren't going to cause problems I'd spend the money to get them
CLA'ed and then check them before I left.
--
Stephe
Tom Rittenhouse
:
: A few background facts re: this question. #1., I am a newbie, with a
: recently purchased C330F. #2., I am planning on going out for two months
: this summer in the field with my camera, and shooting pix for a book. If my
: shutters are in good shape now, catastrophe notwithstanding, what are the
: odds that they will be in good shape by the end of the summer? I will
: probably not shoot more than two rolls of film each day, averaged.
Look at it like this: if your camera is fifteen years old and the
shutter is still reasonably accurate, what change do you expect in
two months?
D Chananie
cheap form of insurance to cover yourself. Also, if you're bringing back over
100 rolls of film, you might wish to have them processed in batches, say 2-4,
at different days at the same lab or indeed different days at different labs.
This provides greater assurance that some of your work will survive.
Dante Stella
This shutter exercise thing seems to be an invention of Rollei users. This
is what I have always heard as one. I think that using a shutter is good,
but in my experience, the Seiko shutters have far better lubrication than
the Compurs (lubed with animal grease?). The Seikos seem to go bad on the
auxilliary functions (self-timer sticking on MXVs and m-synch overdelay
on the MXLs), but I have never seen one go really bad on speeds like I
have seen the Compurs (I have owned nine cameras with the 0 and only one
of them has worked well). Of the four Seikos I have used, none hav had any
problems, even ones 40+ years old.
Just moving the shutter from time to time is no good, becase leaving the
camera at rest for more than a few hours invites the sticking to return,
screwing up your exposire when you need it most. CLA is the ONLY solution,
and only if modern lubricants are used.
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Dante Stella
D.Grabowski
On Sat, 26 Dec 1998 08:24:25 -0800, "Charles Pezeshki"
<pe...@idaho.tds.net> wrote:
>After reading the somewhat contentious Rollei 6000 thread, a question popped
>into my mind.
>
>How well do the Seiko shutters on Mamiya TLR lenses keep their accuracy over
>time?
>
>A few background facts re: this question. #1., I am a newbie, with a
>recently purchased C330F. #2., I am planning on going out for two months
>this summer in the field with my camera, and shooting pix for a book. If my
>shutters are in good shape now, catastrophe notwithstanding, what are the
>odds that they will be in good shape by the end of the summer? I will
>probably not shoot more than two rolls of film each day, averaged.
>
>Chuck Pezeshki
Chuck,
In all honesty I feel if the shutters are working well now they will
continue to throughout the next year as well. The first telltale sign
of a problem would most likely be an uneven sound as the shutter
unwinds at the slower speeds, there should be a steady
swiiiiiish-click as it functions. Another sign of pending trouble is
evidence of lube on the shutter blades and or on the aperture blades,
if you are not good at stopping the shutter action by hand with the
lens off to have a look at the broad sides of the blades, have a
repair man take a look for you.
I have been using Mamiya C series lenses for quite some time and have
never experienced a shutter problem to date. I have one lens with the
grease starting to creap and will probably have that one serviced at
the first sign of off shutter speeds, no sign of that yet though.
While anything can go kaput, your likely to be good to go if all is
working well now.If you are really unsure have them checked out.
Regard's,
David Grabowski
Charles Pezeshki
slower speeds-- and they all seem right on. From the comments above, there
seems to be no slip into oblivion in the shutter speed world-- which would
prompt me to do a CLA. Seems like when things break, they break-- which is
the main conclusion I came to from this thread.
Chuck
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