Support our Sponsors, they keep FADU free:   AG Photographic   The Imaging Warehouse   Process Supplies   RH Designs   Second-hand Darkroom Supplies  

Notices

Go Back   Film and Darkroom User > General discussions > Photography in general

  ***   Click here for the FADU 2015/2014 Yearbooks   ***

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 19th February 2021, 06:29 PM
Lostlabours Lostlabours is online now
Friend
 
Join Date: Apr 2012
Location: West Midlands/Aegean
Posts: 1,988
Default

Quote:
Originally Posted by John King View Post
As far as I an aware tripod screws and the threads in cameras have always used 1/4" or 3/8" Whitworth threads. A 3/16th thread would be far too slender to withstand repeated use. If a camera needs a 3/8" thread and your tripod has a 1/4" thread adapters are available.
John, the bottom of what's left of the Quarter plate Lancaster Instograph has a tripod fitting with an Internal diameter of 1/8th of an inch allowing for the thread depth that maybe a 3/16th tripod thread. Measuring a 3/8th adapter the internal diameter is 3/8th so it's possible the Lancaster thread is less than 3/16th.

It's worth noting that all the thnbwheel fittings on the camera are the same small thread and that the base plate mhas circular marks around the tripod mount idivcating heavy use. These quarter plate cameras were quite light.

I have to admit I was rather surprised at the small tripod mount, the camera was in a job lot and missing to many parts. I 've passed on bits to amember here, his camera was damaged I now realise by a botched job converting to 3/8th.

Ian
Reply With Quote
  #12  
Old 19th February 2021, 08:17 PM
John King John King is offline
Friend
 
Join Date: Nov 2012
Location: County Durham
Posts: 3,318
Default

If it is only as small as you say then it is not standard. The width of threads on a Whitworth screw are quite deep so if the central part is only 1/8th, the 'meat' on the thread will add up to 1/4" unless they are badly worn and with the coarseness of a Whitworth thread that takes some doing.
Reply With Quote
  #13  
Old 20th February 2021, 11:27 AM
Nat Polton Nat Polton is offline
Friend
 
Join Date: Oct 2019
Posts: 758
Default

https://en.wikipedia.org/wiki/Tripod_(photography)

It says that the Royal Photographic Standard for tripod screws was

3/16 24tpi Whitworth or
1/4 20tpi Whitworth for larger cameras.

(tpi = threads per inch.)

Cheers


I am having problems with making a link to the correct page.
Click the above link to take you to Wiki. and then the blue lettering asking if you want tripods (photography.).
Sorry about this.
__________________
It will all be over by Christmas.

Last edited by Nat Polton; 20th February 2021 at 11:46 AM. Reason: Link problems.
Reply With Quote
  #14  
Old 20th February 2021, 12:26 PM
Lostlabours Lostlabours is online now
Friend
 
Join Date: Apr 2012
Location: West Midlands/Aegean
Posts: 1,988
Default

Thanks Nat, I'd assumed it was 3/16th. It amazes me that my heavy 10x8 Agfa Ansco cameras have 3/8th tripod fittings.

Ian
Reply With Quote
  #15  
Old 20th February 2021, 12:39 PM
John King John King is offline
Friend
 
Join Date: Nov 2012
Location: County Durham
Posts: 3,318
Default

Quote:
Originally Posted by Nat Polton View Post
https://en.wikipedia.org/wiki/Tripod_(photography)

It says that the Royal Photographic Standard for tripod screws was

3/16 24tpi Whitworth or
1/4 20tpi Whitworth for larger cameras.

(tpi = threads per inch.)

Cheers


I am having problems with making a link to the correct page.
Click the above link to take you to Wiki. and then the blue lettering asking if you want tripods (photography.).
Sorry about this.
In that case where is the 3/8ths thread? that was used on early Leicas and quit a fer other cameras. There is quite a significant difference in physical size.
Reply With Quote
  #16  
Old 20th February 2021, 01:15 PM
Terry S Terry S is offline
Friend
 
Join Date: Dec 2011
Location: Southend on Sea, Essex, England, UK
Posts: 3,797
Default

Quote:
Originally Posted by Nat Polton View Post
I am having problems with making a link to the correct page.
Click the above link to take you to Wiki. and then the blue lettering asking if you want tripods (photography.).
Sorry about this.
I'm presuming this is the link that Nat mentions:

https://en.wikipedia.org/wiki/Tripod_(photography)

@NAT: Posting a link shouldn't be a problem. There is an icon in the 'post text' box, but I just copy and paste the full link in or after where I want the link in my bit of written text to be and voila!

Terry S

PS @NAT: I see why you might be getting confused, as clicking on the word 'tripod' keeps the same web address as the first page??? I always thought that each web page had its own address???...
Reply With Quote
  #17  
Old 20th February 2021, 01:49 PM
Alan Clark Alan Clark is offline
Friend
 
Join Date: Aug 2009
Location: North Yorkshire
Posts: 1,426
Default

Quote:
Originally Posted by John King View Post
In that case where is the 3/8ths thread? that was used on early Leicas and quit a fer other cameras. There is quite a significant difference in physical size.
Nat didn't quote it, but the 3/8" thread is listed in the Royal Photographic Standard in Wikipedia.

The modern camera thread is UNC, not Whitworth. So close they are interchangeable.

Alan
Reply With Quote
  #18  
Old 20th February 2021, 03:13 PM
Nat Polton Nat Polton is offline
Friend
 
Join Date: Oct 2019
Posts: 758
Default

Terry
The link you posted is the same as the one that I posted.
When you click that link and go to that page, click on the blue lettered link that reads

"Did you mean tripod photography?"

I tried to copy and paste the address on the actual article itself a few times. I cannot get it to work correctly.
The address only takes you back to the first page with the blue lettered link.

Thanks for the try Terry.

Cheers.

p.s. I see you noticed the link problem already Terry.
__________________
It will all be over by Christmas.
Reply With Quote
  #19  
Old 20th February 2021, 04:06 PM
Bob's Avatar
Bob Bob is offline
Administrator
 
Join Date: Aug 2008
Location: London(ish)
Posts: 2,746
Default

Quote:
Originally Posted by Nat Polton View Post
Terry
The link you posted is the same as the one that I posted.
When you click that link and go to that page, click on the blue lettered link that reads

"Did you mean tripod photography?"

I tried to copy and paste the address on the actual article itself a few times. I cannot get it to work correctly.
The address only takes you back to the first page with the blue lettered link.

Thanks for the try Terry.

Cheers.

p.s. I see you noticed the link problem already Terry.

The link was missing the last ")" in the address - I know it looks OK, but the last ")" is actually outside the link tag (you can see it is a different colour to the rest). Isn't technology marvelous! . Just to add confusion, instead of just showing a "404 - Page not found" error which most sites would show, the Wikipedia site sent the text to its search engine (which is clever and much more helpful) - hence the "did you mean ..." link.

Last edited by Bob; 20th February 2021 at 04:11 PM.
Reply With Quote
  #20  
Old 20th February 2021, 04:51 PM
Terry S Terry S is offline
Friend
 
Join Date: Dec 2011
Location: Southend on Sea, Essex, England, UK
Posts: 3,797
Default

Ah! Thanks Bob.

Only now with you pointing it out do I see the extra ')'.

Goes to show how such a little thing can cause so much confusion.

Terry S
Reply With Quote
Reply
Support our Sponsors, they keep FADU free:   AG Photographic   The Imaging Warehouse   Process Supplies   RH Designs   Second-hand Darkroom Supplies  

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
new medium format user Jimmy Photography in general 30 24th January 2015 02:37 PM
FS: Medium Format John King Sale or Wanted 0 16th August 2013 12:57 PM
Medium format projectors Paulie Equipment miscellaneous 9 29th April 2011 07:18 AM
35mm vs medium format jonsparkes Photography in general 22 21st June 2010 04:25 PM
medium format model help rcheer Cameras - medium format 22 25th January 2010 08:55 AM


All times are GMT. The time now is 08:19 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.