1、 STD-SMPTE 220-ENGL L79b 8357403 0002545 02T SMPTE STANDARD ANSVSMPTE 220-1 996 Revision of ANSI/SMPTE 220-1991 for Motion-Picture and Television Equipment - Camera Mounting Connections - 1/4-lnch-20 Thread and 3/8-lnch-I 6 Thread Tripod Screws Page 1 of 2 pages 3.2 Three-eighth inch screws shall be
2、 in accord- 1 Scope ance with ANSI PH3.102. 1.1 This standard specifies the location of the head mounting sockets in the mounting plates Of 3.3 The mounting area on the camera base shall motion-picture and television cameras intended to mate with 1/4-inch-20 thread and 3/8-inch-16 have the following
3、 thickness: thread locking screws. Recommended Minimum 1/44 screw 0.240 in 0.188 in 1.2 The standard is not intended to prescribe 318-in screw 0.359 in 0.250 in design except for the dimensions affecting inter- changeability; for this reason, the socket figures indicate two of many possible designs.
4、 4 Mounting plate 2 Normative references 4.1 Socket The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreement
5、s based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. ANSI PH3.1 O1 -1 983 (RI 987), Photography (Cameras)- Tripod Connections for American Cameras (1 /4-lnch-20 Thread) The head-mounting socket shall be on nomina
6、lly 1 -in (25.4-mm) centers and be located in line as shown in figures 1,2, and 3. 4.2 1M-h screw The thread in the head-mounting socket shall be 1/4-inch-20 UNCPA, in accordance with ANSVASME B1.1, with the following diameter specifications: Minor dia Pitch dia Major dia (inches) (Inches) (Inches)
7、Min O. 1 96 0.2175 0.2500 Max 0.207 0.2223 - ANSI PH3.102-1983 (R1987), Photography (Cameras) - Tripod Connections for Heavy-Duty or Imported Cameras (3/8-lnch-16 Thread with Adapter for 1/4-lnch-20 Thread Tripod Screws) ANSVASME 61.1 -1 989, Unified Inch Screw Threads (UN and UNR Thread Form) 4.3 3
8、/8-n screw The thread in the head-mounting socket shall be 3/8-inch-16 UNCPA, in accordance with ANSVASME B1.1, with the following diameter specifications: 3 Tripod screws Minor dia Pitch dia Major dia (Inches) (Inches) (Inches) 0.3750 3.1 One-quarter inch tripod screws shall be in Min 0.307 0.3344
9、accordance with ANSI PH3.101. Max 0.321 0.3401 - I This Standard may be revised or withdrawn at any time. The procedures of the Standard Developer require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of publication. Purchasers of standard
10、s may receive current information on all standards by Calling or writina the Standard DeveioDer. Printed in USA. Copyright O 1996 by THE SOCIETY OF L American National Standard MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Harisdale Ave., White Plainc, NY 10607 (914) 761-1100 - Approved October 28,
11、1996 STD*SMPTE 220-ENGL L77b 8357403 000254b Tbb ANSVCMPTE 220-1 996 B Center of gravity of camera with lens -1, - - - Nom ino I I, r- i25.4rnml I LENS -4- Ir- UNC Figure 1 - 1/4-inch head-mounting socket I I LENS 4- Figure 2 - %inch head-mounting socket I Nominal - Figure 3 - Combined head-mounting socket Page 2 of 2 pages
