Pentax *ist-D Tripod Screw?

Hello, Can anyone tell me please what the tripod screw type is please.
I have a tripod with a shoe fitting but the screw is missing. Thanks,
Guy.

On Sun, 15 Jul 2007 09:11:33 -0700, grwsmith
wrote:

Hello, Can anyone tell me please what the tripod screw type is please.
I have a tripod with a shoe fitting but the screw is missing. Thanks,
Guy.

Like almost all modern cameras it has the smaller (1/4"
20tpi) of the two standard tripod threads.

--
John Bean

John Bean wrote:
On Sun, 15 Jul 2007 09:11:33 -0700, grwsmith
wrote:

Hello, Can anyone tell me please what the tripod screw type is please.
I have a tripod with a shoe fitting but the screw is missing. Thanks,
Guy.

Like almost all modern cameras it has the smaller (1/4"
20tpi)

It is actually 2/8" with 80 t/4-inches.

On Sun, 15 Jul 2007 18:14:34 -0400, Alan Browne
wrote:

John Bean wrote:
On Sun, 15 Jul 2007 09:11:33 -0700, grwsmith
wrote:

Hello, Can anyone tell me please what the tripod screw type is please.
I have a tripod with a shoe fitting but the screw is missing. Thanks,
Guy.

Like almost all modern cameras it has the smaller (1/4"
20tpi)

It is actually 2/8" with 80 t/4-inches.

****wit. Get a room with Rich, you'll love it.

--
John Bean

grwsmith wrote:

Hello, Can anyone tell me please what the tripod screw type is please.
I have a tripod with a shoe fitting but the screw is missing. Thanks,
Guy.


I have an ist-DS and the QR plate from my tripod at hand.
The thread in the tripod socket on the Pentas ist-DS is like most
cameras today, a 1/4" BSW.

I don't know where the other posters on this thread got their info, but
it's quite surprising the range and bizarre ideas some of them have come
up with.

"dj_nme" wrote in message
...
grwsmith wrote:

Hello, Can anyone tell me please what the tripod screw type is please.
I have a tripod with a shoe fitting but the screw is missing. Thanks,
Guy.


I have an ist-DS and the QR plate from my tripod at hand.
The thread in the tripod socket on the Pentas ist-DS is like most cameras
today, a 1/4" BSW.

I don't know where the other posters on this thread got their info, but
it's quite surprising the range and bizarre ideas some of them have come
up with.

The other responses are a problem of different methods of describing the
same thing and partly a desire to differ on any subject. You mention a 1/4"
BSW (which has 20 threads per inch) screw. This is correct. Also a 1/4-20
screw was mentioned. This is also correct. If you go to a hardware store a
1/4" diameter screw with 20 threads per inch is a 1/4-20 screw. One joker
then had to disagree by mentioning a 2/8th inch screw with 80 threads per
4". 2/8" is the same thing as 1/4". 20 threads per inch is the same thing as
80 threads per 4". So all the responses are the same thing.

Now with tripod mount screws there are two standard threads in common use. A
1/4" screw (which is a 1/4-20 screw that is about 1/4" long) and a 3/8"
screw (which is 3/8-20 I believe and also 1/4" long). So when the OP asked
what screw the Pentax camera uses, the answer can be "a 1/4" screw" or "a
1/4-20 screw" and be correct. In either case you are indicating that it is
not a 3/8" tripod screw.

Randy

==========
Randy Berbaum
Champaign, IL

On Mon, 16 Jul 2007 11:05:24 +1000, dj_nme
wrote:
I don't know where the other posters on this thread got their info, but
it's quite surprising the range and bizarre ideas some of them have come
up with.

There were only two previous posters, one of them being me
and the other was trying to take the ****. The information I
gave is correct. I specifically avoided saying it was a
Whitworth (BSW) thread as this claim is contentious in some
circles and may not even be correct, not that it matters
much.

1/4" Whitworth threads have a slightly different profile
compared with 1/4" UNC (1/4-20) threads but not enough to
matter for camera use. Some will argue the "correct" thread
is BSW, others that it's UNC. But both are the same diameter
- 1/4" - and both have the same thread pitch - 20tpi - and
both will fit.

So I repeat - it's 1/4" diameter with 20 threads per inch,
whether BSW or UNC matters not a bit in this application.

Now - where did you get *your* information and what makes
you think my answer was incorrect?

--
John Bean

John Bean wrote:

On Mon, 16 Jul 2007 11:05:24 +1000, dj_nme
wrote:

I don't know where the other posters on this thread got their info, but
it's quite surprising the range and bizarre ideas some of them have come
up with.


There were only two previous posters, one of them being me
and the other was trying to take the ****. The information I
gave is correct. I specifically avoided saying it was a
Whitworth (BSW) thread as this claim is contentious in some
circles and may not even be correct, not that it matters
much.

1/4" Whitworth threads have a slightly different profile
compared with 1/4" UNC (1/4-20) threads but not enough to
matter for camera use. Some will argue the "correct" thread
is BSW, others that it's UNC. But both are the same diameter
- 1/4" - and both have the same thread pitch - 20tpi - and
both will fit.

So I repeat - it's 1/4" diameter with 20 threads per inch,
whether BSW or UNC matters not a bit in this application.

Now - where did you get *your* information and what makes
you think my answer was incorrect?

I've only ever seen the smaller tripod screw size described as 1/4" BSW,
at technical college and in most of the literature I've read.
It (1/4" BSW) also fits perfectly into a standard triopd socket, so I've
never had any reason to doubt it.
UNC bolts and screws are also rather rare in my country, the three
common thread types available are Metric Course, Metric Fine and BSW.

The Pentax ist-DS certainly doesn't have a 3/8" BSW socket, which is the
larger "European" style tripod socket.

On Mon, 16 Jul 2007 22:28:29 +1000, dj_nme
wrote:

The Pentax ist-DS certainly doesn't have a 3/8" BSW socket, which is the
larger "European" style tripod socket.

Who said it did? Certainly not me.

I completely fail to understand what you're arguing about.

I wrote this:

"Like almost all modern cameras it has the smaller (1/4"
20tpi) of the two standard tripod threads."

So what do you find incorrect about this simple statement of
fact?

I acknowledged that there were two possible sizes - because
there are - and made it clear that the smaller was required
along with the specification. I deliberately didn't mention
the size of the alternative - as you just did - as it was
irrelevant to the question and likely to cause confusion.

Incidentally the 3/8" 20tpi isn't really a "European" size
at all, but a size very commonly used on larger tripods and
heads to provide more strength, and on some heavy cameras
for the same reason. It hasn't really been used on small
cameras for half a century, and even back then it wasn't
universal by any means.

--
John Bean

John Bean wrote:
On Mon, 16 Jul 2007 22:28:29 +1000, dj_nme
wrote:


The Pentax ist-DS certainly doesn't have a 3/8" BSW socket, which is the
larger "European" style tripod socket.


Who said it did? Certainly not me.

I never wrote that you did.
It is a display of paranoia to believe otherwise.

I completely fail to understand what you're arguing about.

I wrote this:

"Like almost all modern cameras it has the smaller (1/4"
20tpi) of the two standard tripod threads."

So what do you find incorrect about this simple statement of
fact?

I acknowledged that there were two possible sizes - because
there are - and made it clear that the smaller was required
along with the specification. I deliberately didn't mention
the size of the alternative - as you just did - as it was
irrelevant to the question and likely to cause confusion.

Merely to illustrate the possible other size that can be found on tripod
mounts.
How can "The Pentax ist-DS certainly doesn't have a 3/8" BSW socket" be
even remotely confusing?
Also, why take as a personal attack?

Incidentally the 3/8" 20tpi isn't really a "European" size
at all, but a size very commonly used on larger tripods and
heads to provide more strength, and on some heavy cameras
for the same reason. It hasn't really been used on small
cameras for half a century, and even back then it wasn't
universal by any means.

Most of the older European cameras have a 3/8" BSW tripod socket, I have
two Leica screwmount bodies and a Contax II which both are 35mm film
cameras with a 3/8" BSW tripod socket.
Also, a Zenit Photosnaiper with a 3/8" BSW tripod socket in the camera body.
In this country, it has been mostly European 35mm cameras that have a
3/8" BSW tripod socket.
They aren't attacking you either.