|
1 |
<- F1 is usually on seen on special purpose low light lenses. |
F16 daylight exposure rule
|
|
1.4
|
<- F1.4 on some normal lenses | |
|
2
|
||
|
2.8
|
||
|
4
|
||
|
5.6
|
<- A lot of enlarging lenses set to the F5.6 - F16 range in use | |
|
8
|
||
|
11
|
||
|
16
|
1/ASA
|
|
|
22
|
<- About the limit for most 35 mm lenses |
2/ASA
|
|
32
|
<- F32 to F90 are common settings for view camera lenses |
4/ASA
|
|
45
|
8/ASA
|
|
|
64
|
<- Start of the "pinhole" range |
16/ASA
|
|
90
|
32/ASA
|
|
|
128
|
<- Limit of special purpose lenses. |
64/ASA
|
|
180
|
<- Only pinholes from here on out |
128/ASA
|
|
256
|
256/ASA
|
|
|
360
|
512/ASA
|
|
|
512
|
1024/ASA
|
|
|
720
|
2048/ASA
|
|
|
1024
|
4096/ASA
|
|
|
1440
|
8192/ASA
|
|
|
2048
|
|
16384/ASA
|
Remember:
Going from a larger number to the next smaller number is a doubling of light
Going from a smaller number to the next larger number is a halving of light