(UNTITLED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP67B00511R000100110090-0
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 3
• Document Creation Date: December 14, 2016
• Document Release Date: November 20, 2002
• Sequence Number: 90
• Publication Date: May 24, 1961
• Content Type: MF

Approved For Re a 2003/01/ IA-RDP67B0051I R1#1 11 0 -0
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6 V
24 l9bl
At1 'FOR s fir. Kiefer
1. The formula for lens film combination resolution is t
Homver, the following torila will give a quick close check on lens
film reaalutioi and this I have usedt
1
rl-
2. Using available film data and the following for the 4B inch
F5.6 lens, we find the resolution and exposure capability as indicated:
T stop 6
Lens esolution 180 lines lpes, low contrast (2:1)
3. SO 132 film, Limiting resolution 225 lpm, high contrast
(1,000:1)
/ PJ .0- 3 i 7"
( Src ! 1L 2-
Approved For Release 2003/01/24: CIA-RDP67B00511 R000100110090-0
 Approved For Rose 2003/01/24: CIA-RDP67B00511R9100110090-0
4? 50 330 film, Uniting resolution 160 ip n, high contrast
{1, 1,1} will give a lens film resolution of 96 4=.
5. Employing the above, we find that we can use the 48 inch
P56 lens under the follcsring cendi t tons:
50130
80102
Surat. Res.
SunL-
Res.
sun Z, Fee.
3,50
15?up 101.25
5?up
96
5?up
63
2/125
2O 'up 101.25
5?up
96
5?up
63
1/250
do not Lm
7?up
96
5?up
63
25X1A
Approved For Release 2003/01/24: CIA-RDP67B00511R000100110090-0
 Approved For.ase 2003/01/24: CIA-RDP67B0051190100110090-0
PD-3105-61
23 M 1961
copiee of HR
DuUetino pertaining to
Ltion. These bulletins are forwardod for your
retention for the du
of the pro jeffit.
Distribu ion:
25X1A O U
1 DPD }3
1-DPD/RI
DPD/D13 LEWsrew
Sincere .y,
Approved For Release 2003/01/24: CIA-RDP67BOO511 R000100110090-0