Time was, you wouldn't see a plastic drive gear in $300 body let alone a $3500 one

On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120) and it had a gear like that that would strip. A problem OM-1n's and Nikon FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?
--

Regards,

Eric Stevens

On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120) and it had a gear like that that would strip. A problem OM-1n's and Nikon FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

On Sun, 11 Sep 2016 09:24:42 +1200, Me wrote:

On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120) and it had a gear like that that would strip. A problem OM-1n's and Nikon FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

So what is essentially wrong with using it?
--

Regards,

Eric Stevens

On Sat, 10 Sep 2016 17:26:37 -0700 (PDT), RichA
wrote:

On Saturday, 10 September 2016 17:24:49 UTC-4, Me wrote:
On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120) and it had a gear like that that would strip. A problem OM-1n's and Nikon FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

Kind of like when GM tried to use aluminum blocks without cylinder sleeves (Vega).

They had problems but not with the aluminium cylinder bores. See under
the heading of 'History' in
https://en.wikipedia.org/wiki/Rover_V8_engine

In any case Mercedes made engines of similar construction for many
years without significant problems.
--

Regards,

Eric Stevens

In article ,
Eric Stevens wrote:

On Sun, 11 Sep 2016 09:24:42 +1200, Me wrote:

On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120) and
it had a gear like that that would strip. A problem OM-1n's and Nikon
FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...side-the-canon
-eos-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

So what is essentially wrong with using it?

You se plastic gears in lots of things that lasts well but the precision
in manufacturing of the device have to be high since a slightly
displaced gear like this will be milled down fast.
This is a $3k+ camera and this is a likely kill switch for it over time.
Not that I don't think that competition as similar ones in less
inspectoral places. Reminds me of the dysfunctional A-1 that I
disassembled years ago.
--
teleportation kills

On 9/11/2016 1:34 AM, android wrote:
In article ,
Eric Stevens wrote:

On Sun, 11 Sep 2016 09:24:42 +1200, Me wrote:

On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120) and
it had a gear like that that would strip. A problem OM-1n's and Nikon
FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...side-the-canon
-eos-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

So what is essentially wrong with using it?

You se plastic gears in lots of things that lasts well but the precision
in manufacturing of the device have to be high since a slightly
displaced gear like this will be milled down fast.
This is a $3k+ camera and this is a likely kill switch for it over time.
Not that I don't think that competition as similar ones in less
inspectoral places. Reminds me of the dysfunctional A-1 that I
disassembled years ago.


IIRC my Nikon FM had plastic gears on the winding spool., They failed
after about a year.

--
PeterN

In article ,
PeterN wrote:

On 9/11/2016 1:34 AM, android wrote:
In article ,
Eric Stevens wrote:

On Sun, 11 Sep 2016 09:24:42 +1200, Me wrote:

On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120)
and
it had a gear like that that would strip. A problem OM-1n's and Nikon
FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...inside-the-can
on
-eos-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

So what is essentially wrong with using it?

You se plastic gears in lots of things that lasts well but the precision
in manufacturing of the device have to be high since a slightly
displaced gear like this will be milled down fast.
This is a $3k+ camera and this is a likely kill switch for it over time.
Not that I don't think that competition as similar ones in less
inspectoral places. Reminds me of the dysfunctional A-1 that I
disassembled years ago.


IIRC my Nikon FM had plastic gears on the winding spool., They failed
after about a year.

I checked that camera out at a store. It had "ventilation" holes under
the lever for double exposure... I borrowed a Nikkormat from a teacher
in "junior high". It did not impress. Got myself an OM-1 and was quite
happy for a while...
--
teleportation kills

On Sun, 11 Sep 2016 13:29:48 -0400, PeterN
wrote:

On 9/11/2016 1:34 AM, android wrote:
In article ,
Eric Stevens wrote:

On Sun, 11 Sep 2016 09:24:42 +1200, Me wrote:

On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120) and
it had a gear like that that would strip. A problem OM-1n's and Nikon
FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...side-the-canon
-eos-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

So what is essentially wrong with using it?

You se plastic gears in lots of things that lasts well but the precision
in manufacturing of the device have to be high since a slightly
displaced gear like this will be milled down fast.
This is a $3k+ camera and this is a likely kill switch for it over time.
Not that I don't think that competition as similar ones in less
inspectoral places. Reminds me of the dysfunctional A-1 that I
disassembled years ago.


IIRC my Nikon FM had plastic gears on the winding spool., They failed
after about a year.

Was yours an FM or a FM2?

I had an FM and it was real work horse which never gave me any
trouble.
--

Regards,

Eric Stevens

On 9/11/2016 1:36 PM, android wrote:
In article ,
PeterN wrote:

On 9/11/2016 1:34 AM, android wrote:
In article ,
Eric Stevens wrote:

On Sun, 11 Sep 2016 09:24:42 +1200, Me wrote:

On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120)
and
it had a gear like that that would strip. A problem OM-1n's and Nikon
FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...inside-the-can
on
-eos-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

So what is essentially wrong with using it?

You se plastic gears in lots of things that lasts well but the precision
in manufacturing of the device have to be high since a slightly
displaced gear like this will be milled down fast.
This is a $3k+ camera and this is a likely kill switch for it over time.
Not that I don't think that competition as similar ones in less
inspectoral places. Reminds me of the dysfunctional A-1 that I
disassembled years ago.


IIRC my Nikon FM had plastic gears on the winding spool., They failed
after about a year.

I checked that camera out at a store. It had "ventilation" holes under
the lever for double exposure... I borrowed a Nikkormat from a teacher
in "junior high". It did not impress. Got myself an OM-1 and was quite
happy for a while...


I had a different experience. My Nikkormat, circa 1970. I used it
underwater and was not gentle with it. My old Nikkormat is alive and
well. It was built like a hockey puck.


--
PeterN

In article ,
PeterN wrote:

On 9/11/2016 1:36 PM, android wrote:
In article ,
PeterN wrote:

On 9/11/2016 1:34 AM, android wrote:
In article ,
Eric Stevens wrote:

On Sun, 11 Sep 2016 09:24:42 +1200, Me wrote:

On 10/09/2016 20:41, Eric Stevens wrote:
On Fri, 9 Sep 2016 21:03:51 -0700 (PDT), RichA
wrote:

I remember the Pentax K1000 which was a cheap DSLR at the time ($120)
and
it had a gear like that that would strip. A problem OM-1n's and
Nikon
FE's didn't have.
Meanwhile...

https://www.dpreview.com/news/914199...s-inside-the-c
an
on
-eos-5d-iv?slide=7

It's good enough for timing gears inside an engine. Why should it not
be good enough for a camera?

Plastic and plastic coated timing gears inside an engine were a pretty
awful idea - often with a high failure rate (they also created a market
for non-OEM metal replacement gears).
However I doubt the plastic gear in the Canon 5D IV is expected to
endure operation for thousands of hours at high temperatures.

So what is essentially wrong with using it?

You se plastic gears in lots of things that lasts well but the precision
in manufacturing of the device have to be high since a slightly
displaced gear like this will be milled down fast.
This is a $3k+ camera and this is a likely kill switch for it over time.
Not that I don't think that competition as similar ones in less
inspectoral places. Reminds me of the dysfunctional A-1 that I
disassembled years ago.


IIRC my Nikon FM had plastic gears on the winding spool., They failed
after about a year.

I checked that camera out at a store. It had "ventilation" holes under
the lever for double exposure... I borrowed a Nikkormat from a teacher
in "junior high". It did not impress. Got myself an OM-1 and was quite
happy for a while...


I had a different experience. My Nikkormat, circa 1970. I used it
underwater and was not gentle with it. My old Nikkormat is alive and
well. It was built like a hockey puck.

YMMV, the one digit OM was great cameras as long as you were not
myoptic, or wanted a more discriminating light meter. I know that the 3
an d4 cured some of those problems then I had moved on mentally. Those
experiences made me try the Oly 4/3 system that really sucked bad. I
simply thought that they had some tricks up their sleeve but they did
not. Bigger is better. I think that halfframe or APS-C is the smallest
sensor useable in serious photography so those reservations that I've
ranted about repeatedly goes for the OlySonic mFTs and the Nikon Ones
too.
--
teleportation kills