| View previous topic :: View next topic |
| Author |
Message |
ChrisR
Joined: 14 Mar 2009
Posts: 3050
Location: Near London, UK
|
 Posted: Tue Dec 14, 2010 8:29 am Post subject: FAQ: Screw Threads we use |
 |
|
I believe this list is correct as far as it goes.
I know there are more, and will add as I hear of them.
Suggestion - advise edits needed by PM, or this forum "thread" will grow forever 
Admin - please edit.
With thanks to many contributors 
| Code: | 0.8" x 36tpi RMS microscope objectives Includes many Finite objectives (except eg Nikon BDs),
and some Nikon Infinites including CF and BE.
25mm x 0.5mm Schneider enlarging lenses
25mm x 0.75mm Nikon CFI60 Infinite microscope objectives,
1" x 32tpi C mount (32 tpi = 0.794mm)
1.035" x 40tpi ?? (40 tpi = 0.635 mm)
26mm x 36tpi Mitutoyo infinity microscope objectives (36 tpi = 0.706mm)
26mm x 0.75mm Nikon BD 210mm finite objectives, Nikon LU Infinites, and others
27mm x 0.75mm Nikon BD infinity objectives
28mm x 0.5mm Schneider enlarging lenses
30mm x 0.5mm Schneider enlarging lenses
30.5mm x 0.5mm Schneider enlarging lenses
32mm x 0.75mm Nikon LU BD Plan series of large industrial objectives
32.5mm x 0.5mm Some Enlarger lenses eg Schneider (eg135mm f/5.6) Rodenstock, early Nikon EL (eg 80, 105).
Some Nikon EL came with adapter to 39mm
35mm x 0.5mm Schneider enlarging lenses
39.0mm x 0.75mm Schneider MAKRO-SYMMAR HM 180mm f/5.6
39mm x 26tpi Leica lens mount. The Enlarger lens standard. Often quoted as 1mm (26 tpi = 0.977mm)
40mm x 0.75mm Leitz eg Photar Symmar eg 50mm f/2.8
42mm x 0.75mm T2 standard mount
42mm x 1mm "M42" Pentax/Praktika lens mount, a common standard
43mm x 0.75mm Schneider enlarging lenses
45mm x 0.75mm mount for 75mm, 95mm, and 105mm Printing-Nikkors,
also used on the adapters and extensions for the Rodenstock Modular Focus Unit.
50mm x 0.75mm Schneider enlarging lenses
55mm x 0.75mm Schneider enlarging lenses
66mm x 0.75mm Schneider enlarging lenses
77mm x 0.75mm Schneider enlarging lenses
90mm x 1mm Schneider enlarging lenses
|
Filter threads: generally 0.75mm pitch at 43mm diameter and larger, 0.5mm pitch at 40.5mm diameter and smaller. Exceptions occur in the smaller diameters and some diameters are available in both.
See eg Hoya Catalogue P17
Enlarging lens filter threads, used eg for reversing: Pitch 0.5mm or 0.75mm, shown where known.
| Code: |
30.5mm
Rodenstock
Rodagon 28mm, 35mm,
Rogonar-S 28mm, 35mm
Schneider
Old Style Componon *, 28mm, 35mm, 50mm, 60mm, 80mm, 105mm
Xenon 40mm f/2.8
34.5mm
Nikon
El-Nikkor 50mm F/4.
35.5mm
Schneider
Comparon 105mm
Componar C105mm
Componon WA60mm
40.5mm x 0.5mm
Nikon
El-Nikkor 50mm f2.8&N, 63mm f2.8&N, 75mm f5.6&N, 105mm f5.6&N
Rodenstock,
Rodagon 35mm, 50mm, 75mm, 80mm, 105mm,
Schneider
Comparon 135mm f/5.6
43mm x 0.75mm
Nikon
El-Nikkor 135mm f/5.6 and others
Rodenstock,
Rogonar-S, 50mm, 60mm, 75mm, 90mm, 105mm,
Rodagon 50mm, 60mm, 80mm, 105mm, 135mm
Rodagon-WA, 40mm, 60mm, 80mm,
Rodagon-G, 50mm, 105mm,
Apo Rodagon-N, 50mm, 80mm, 90mm, 105mm,
Apo Rodagon-D, 1:1 75mm f/4, 2:1 75mm f/4.5
Schneider
Comparon 50mm, 75mm
Componon New Style 50mm, 60mm, 75mm, 105mm
Componon-S 50mm, 80mm, 100mm*
Componon WA 40mm
HM Apo Componon 40mm f/2.8, 45mm f/4, 50mm f/2.8
49mm
Rodenstock
Rodagon-G 150mm
Schneider
Componon-S 135mm, 150mm
52m x 0.75mm 135mm Schneider Componon-S
62m x 0.75mm 150mm Schneider Componon-S
72m x 0.75mm 180mm Schneider Componon-S
82m x 0.75mm 210mm Schneider Componon-S
100m x 1mm 240mm Schneider Componon-S
110m x 1mm 300mm Schneider Componon-S
Notes:
"Old" and "New" style Schneider lenes are known to occur with different threads
Rodenstock Rodagon 28mm and 35mm lenses have no filter threads on some (later?) versions
---
Minolta
Rokkor
25mm f/3.5 tba
30mm MC f/2.8 No filter thread
50mm MC f/2.8 ?
50mm f/4 ?
75mm f/4.5 ?
|
Copal Shutter mounts:
| Code: | COPAL spec. #0 #1 #3 #3s
front thread M29.5-0.5 M40-0.75 M58-0.75 M56-0.75
back thread M29.5-0.5 M36-0.75 M58-0.75 M56-0.75
overall thickness 20 mm 20 mm 32 mm 28.6 mm
front to iris 10.2 mm 10.75 mm 17.7 mm 16.25 mm
mount thread M32.5-0.5 M39-0.75 M62-0.75 M61-0.75
lensboard hole 34.6 mm 41.6 mm 65 mm 64.1 mm
iris dia 24 mm 30 mm 45 mm 45 mm
|
Lens register distances, and some thread sizes:
http://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html
An important macro lens listing:
http://www.macrolenses.de/objektive.php
A forum discussion of Nikon and Mitutoyo M26 objective mounting threads:
http://photomacrography.net/forum/viewtopic.php?t=12404
Note:
1" means one inch, tpi means Threads Per Inch (pitch)
One inch = 25.4mm
Last edited by ChrisR on Fri Apr 05, 2013 7:05 am; edited 44 times in total |
|
| Back to top |
|
 |
ChrisLilley
Joined: 01 May 2010
Posts: 680
Location: Nice, France (I'm British)
|
| Posted: Tue Dec 14, 2010 9:45 am Post subject: |
|
|
| Quote: | | True Leica thread-mount (LTM) is 39 mm in width and has a thread of 26 turns-per-inch Whitworth, approximately 0.977 mm. |
http://en.wikipedia.org/wiki/M39_lens_mount |
|
| Back to top |
|
|
RogelioMoreno
Joined: 20 Nov 2009
Posts: 1523
Location: Panama
|
| Posted: Tue Dec 14, 2010 11:32 am Post subject: |
|
|
25mm x 0.75mm - Nikon CFI60 LU EPI series
32mm x 0.75mm - Nikon CFI60 LU BD series
Rogelio |
|
| Back to top |
|
|
ChrisR
Joined: 14 Mar 2009
Posts: 3050
Location: Near London, UK
|
| Posted: Tue Dec 14, 2010 12:12 pm Post subject: |
|
|
| I have a Nikon infinity rms objective or two. Not sure when they changed. Anyone? |
|
| Back to top |
|
|
RogelioMoreno
Joined: 20 Nov 2009
Posts: 1523
Location: Panama
|
| Posted: Tue Dec 14, 2010 4:35 pm Post subject: |
|
|
| ChrisR wrote: | | I have a Nikon infinity rms objective or two. Not sure when they changed. Anyone? |
The old 45mm parfocal infinity EPI series are rms and the infinity BD series are 27mm.
The new 60mm parfocal (CFI60) are 25mm; but the BD series are 32mm.
Rogelio |
|
| Back to top |
|
|
pgk
Joined: 15 May 2010
Posts: 46
|
| Posted: Sat Jan 01, 2011 9:06 am Post subject: |
|
|
FWIW - Leitz produced some Photars (such as the 50mm f/2. with an M40 x 0.75 thread mount.
_________________
Paul |
|
| Back to top |
|
|
Blame
Joined: 14 May 2010
Posts: 212
|
| Posted: Mon Jan 24, 2011 10:51 am Post subject: |
|
|
| Don't filter threads generally have 0.75mm pitch? |
|
| Back to top |
|
|
SONYNUT
Joined: 22 Jan 2011
Posts: 608
Location: Minnesota USA
|
|
| Back to top |
|
|
Harold Gough
Joined: 09 Mar 2008
Posts: 5732
Location: Reading, Berkshire, England
|
|
| Back to top |
|
|
rjlittlefield
Site Admin
Joined: 01 Aug 2006
Posts: 12572
Location: Richland, Washington State, USA
|
| Posted: Sun Feb 20, 2011 11:39 am Post subject: Re: Threads we use |
|
|
| ChrisR wrote: | | 26mm x 0.75mm Nikon BD 210mm finite objectives, Mitutoyo and others (Have seen 36tpi quoted, which would be 0.70mm) |
In every reference I can find, Mitutoyo threads are consistently listed as M26 x 36TPI or M26 x 0.706. Those are different ways of specifying the same thread.
In contrast, my Nikon objectives measure M25, M26, and M27 x 0.75 mm (except for the old RMS threads which are 0.8 in x 36 TPI).
It looks to me that the Nikon M26 and Mitutoyo M26 threads are fundamentally incompatible, although in some adapters the threads may fit loose enough to work either way.
Can somebody who has both types of objectives run a direct comparison to confirm this?
--Rik |
|
| Back to top |
|
|
ChrisR
Joined: 14 Mar 2009
Posts: 3050
Location: Near London, UK
|
| Posted: Sun Feb 20, 2011 12:13 pm Post subject: |
|
|
I have both.
You're probably right. All lenses fit all adapters without apparent issues so far. Perhaps there are so few turns it doesn't give a problem. I'll see if I can measure them - not sure how! |
|
| Back to top |
|
|
rjlittlefield
Site Admin
Joined: 01 Aug 2006
Posts: 12572
Location: Richland, Washington State, USA
|
| Posted: Sun Feb 20, 2011 12:27 pm Post subject: |
|
|
| ChrisR wrote: | | I'll see if I can measure them - not sure how! |
Direct comparison should be good enough. Just use the threads on a known objective as if they were a thread gauge. My guess that an RMS objective will mate tightly with the Mitutoyo, but the Nikon M25, M26, M27 won't quite match up.
--Rik |
|
| Back to top |
|
|
ChrisLilley
Joined: 01 May 2010
Posts: 680
Location: Nice, France (I'm British)
|
| Posted: Sun Feb 20, 2011 5:46 pm Post subject: Re: Threads we use |
|
|
| rjlittlefield wrote: |
In every reference I can find, Mitutoyo threads are consistently listed as M26 x 36TPI or M26 x 0.706. Those are different ways of specifying the same thread.
In contrast, my Nikon objectives measure M25, M26, and M27 x 0.75 mm (except for the old RMS threads which are 0.8 in x 36 TPI).
It looks to me that the Nikon M26 and Mitutoyo M26 threads are fundamentally incompatible, although in some adapters the threads may fit loose enough to work either way. |
And thus I would much rather the table give the actual measurements in the units as specified, even if these mix imperial and metric units. Approximations can always be listed in the notes.
So Leica LTM is 39mm x 26tpi, not 39mm x 1mm although as Rik notes some imprecision may still allow a fit if nly a couple of threads are engaged. Similarly, I would prefer to see Mitutoyo listed as 26mm x 36tpi, as specified. |
|
| Back to top |
|
|
ChrisR
Joined: 14 Mar 2009
Posts: 3050
Location: Near London, UK
|
| Posted: Sun Feb 20, 2011 6:10 pm Post subject: |
|
|
| Quote: | | My guess that an RMS objective will mate tightly with the Mitutoyo, but the Nikon M25, M26, M27 won't quite match up. |
Hard to tell just eyeballing the couple of threads which can be brought together, but I think you're right, so I've amended the table.
Adaptors don't always(!) seem too critical, for example a Mitutoyo screws into a C mount quite happily
Thats 26 x 0.706 into 25.4 x 0.794
Chris L - noted, thanks.
Last edited by ChrisR on Sun Feb 10, 2013 12:44 pm; edited 2 times in total |
|
| Back to top |
|
|
ChrisLilley
Joined: 01 May 2010
Posts: 680
Location: Nice, France (I'm British)
|
| Posted: Sun Feb 20, 2011 6:56 pm Post subject: |
|
|
| ChrisR wrote: |
Chris L - noted, thanks. |
Thanks for the update, Chris. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
