Retun to Project Main Page not changeable critical values calculated
Fractions of not allowed
(here all in milliseconds only, should be microseconds)
Values in Displays   Artihmetic Calculation of 1/3 step EV into milliseconds     dbl check values
Nikon Sigma   TD (a variable) true 3rds in: TE (a variable) TR (a variable)   visualize errors 1 millisecond = 0.001 seconds
    seconds (in 1/3 steps) TE (a Variable) seconds milliseconds Register #     1 second = 1000 milliseconds
8000   0.000125 1/8000 s 8000 0.000125 0.1250 0 -1333.33  
6400   0.00015625 1/6666 s 6666.666667 0.00015 0.1500 1 -1333.33   seconds milliseconds
5000   0.0002 1/5333 s 5333.333333 0.0001875 0.1875 2 -1333.33   1 1000
4000 4000 0.00025 1/4000 s 4000 0.00025 0.2500 3 -666.667 -666.667 0.000125 0.125
3200 3200 0.0003125 1/3333 s 3333.333333 0.0003 0.3000 4 -666.667  
2500 2500 0.0004 1/2666 s 2666.666667 0.000375 0.3750 5 -666.667  
2000 2000 0.0005 1/2000 s 2000 0.0005 0.5000 6 -333.333 -333.333
1600 1600 0.000625 1/1666 s 1666.666667 0.0006 0.6000 7 -333.333  
1250 1250 0.0008 1/1333 s 1333.333333 0.00075 0.7500 8 -333.333  
1000 1000 0.001 1/1000 s 1000 0.001 1.0000 9 -166.667 -166.667
800 800 0.00125 1/833 s 833.3333333 0.0012 1.2000 10 -166.667  
640 640 0.0015625 1/666 s 666.6666667 0.0015 1.5000 11 -166.667  
500 500 0.002 1/500 s 500 0.002 2.0000 12 -83.3333 -83.3333
400 400 0.0025 1/416 s 416.6666667 0.0024 2.4000 13 -83.3333  
320 320 0.003125 1/333 s 333.3333333 0.003 3.0000 14 -83.3333  
250 250 0.004 1/250 s 250 0.004 4.0000 15 -41.6667 -41.6667
200 200 0.005 1/208 s 208.3333333 0.0048 4.8000 16 -41.6667  
160 160 0.00625 1/166 s 166.6666667 0.006 6.0000 17 -41.6667  
125 125 0.008 1/125 s 125 0.008 8.0000 18 -20.8333 -20.8333
100 100 0.01 1/104 s 104.1666667 0.0096 9.6000 19 -20.8333  
80 80 0.0125 1/83 s 83.33333333 0.012 12.0000 20 -20.8333  
60 60 0.016666667 1/60 s 62.5 0.016 16.0000 21 -10.4167 -10.4167
50 50 0.02 1/52 s 52.08333333 0.0192 19.2000 22 -10.4167  
40 40 0.025 1/41 s 41.66666667 0.024 24.0000 23 -10.4167  
30 30 0.033333333 1/30 s 31.25 0.032 32.0000 24 -5.20833 -5.20833
25 25 0.04 1/26 s 26.04166667 0.0384 38.4000 25 -5.20833  
20 20 0.05 1/20 s 20.83333333 0.048 48.0000 26 -5.20833  
15 15 0.066666667 1/15 s 15.625 0.064 64.0000 27 -2.54167 -2.60417
13 13 0.076923077 1/13 s 13.08333333 0.076433121 76.4331 28 -2.54167  
10 10 0.1 1/10 s 10.54166667 0.09486166 94.8617 29 -2.54167  
8 8 0.125 1/8 s 8 0.125 125.0000 30 -1.33333 -1.27083
6 6 0.166666667 1/6 s 6.666666667 0.15 150.0000 31 -1.33333  
5 5 0.2 1/5 s 5.333333333 0.1875 187.5000 32 -1.33333  
4 4 0.25 1/4 s 4 0.25 250.0000 33 -0.66667 -0.66667
3 0.3 0.333333333 0.3 s 3.333333333 0.3 300.0000 34 -0.66667  
2.5 0.4 0.4 0.4 s 2.666666667 0.375 375.0000 35 -0.66667  
2 0.5 0.5 0.5 s 2 0.5 500.0000 36 -0.33333 -0.33333
1.6 0.6 0.625 0.6 s 1.666666667 0.6 600.0000 37 -0.33333  
1.3 0.8 0.769230769 0.8 s 1.333333333 0.75 750.0000 38 -0.33333  
1 1 1 1 s 1 1 1000.0000 39 0.333333 0
1.3 1.3 1.3 1.333 s 1.333333333 1.333333333 1333.3333 40 0.333333  
1.6 1.6 1.6 1.666 s 1.666666667 1.666666667 1666.6667 41 0.333333  
2 2 2 2 s 2 2 2000.0000 42 0.666667 0.666667
2.5 2.5 2.5 2.666 s 2.666666667 2.666666667 2666.6667 43 0.666667  
3 3.2 3.2 3.333 s 3.333333333 3.333333333 3333.3333 44 0.666667  
4 4 4 4 s 4 4 4000.0000 45 1.333333 1.333333
5 5 5 5.33 s 5.333333333 5.333333333 5333.3333 46 1.333333  
6 6 6 6.67 s 6.666666667 6.666666667 6666.6667 47 1.333333  
8 8 8 8 s 8 8 8000.0000 48 2.333333 2.666667
10 10 10 10.333 s 10.33333333 10.33333333 10333.3333 49 2.333333  
13 13 13 12.666 s 12.66666667 12.66666667 12666.6667 50 2.333333  
15 15 15 15 s 15 15 15000.0000 51 5 4.666667
20 20 20 20 s 20 20 20000.0000 52 5  
25 25 25 25 s 25 25 25000.0000 53 5  
30 30 30 30 s 30 30 30000.0000 54 10 10
Bulb mode Bulb mode   40 s 40 40 40000.0000 55 10  
Bulb mode Bulb mode   50 s 50 50 50000.0000 56 10  
Bulb mode Bulb mode   1m 60 60 60000.0000 57 20 20
Bulb mode Bulb mode   1 min 20s 80 80 80000.0000 58 20  
Bulb mode Bulb mode   1m 40s 100 100 100000.0000 59 20  
Bulb mode Bulb mode   2m 120 120 120000.0000 60 40 40
Bulb mode Bulb mode   2m 40s 160 160 160000.0000 61 40  
Bulb mode Bulb mode   3m 20s 200 200 200000.0000 62 40  
Bulb mode Bulb mode   4m 240 240 240000.0000 63 80 80
5m 20s 320 320 320000.0000 64 80  
6m 40s 400 400 400000.0000 65 80  
8m 480 480 480000.0000 66 160 160
10m 40s 640 640 640000.0000 67 160  
13m 20s 800 800 800000.0000 68 160  
16m 960 960 960000.0000 69 320 320
21m 20s 1280 1280 1280000.0000 70 320  
26m 40s 1600 1600 1600000.0000 71 320  
32m 1920 1920 1920000.0000 72 640 640
42m 40s 2560 2560 2560000.0000 73 640  
53m 20s 3200 3200 3200000.0000 74 640  
64m 3840 3840 3840000.0000 75 1280 1280
1h 25m 20s 5120 5120 5120000.0000 76 1280  
1h 46m 40s 6400 6400 6400000.0000 77 1280  
2h 8m 7680 7680 7680000.0000 78 2560 2560
2 h 50m 40s 10240 10240 10240000.0000 79 2560  
3h 33m 20s 12800 12800 12800000.0000 80 2560  
4h 16m 15360 15360 15360000.0000 81    
Variables
Name Description     Limited Values for Variables:    
TE (L) longest Exposure Time   Variable Name     Values
TE (S) shortest Exposure Time   TM SB BI (1/3 Stop) 1
TM (mu) time between Mirror-up and shots taken TM SB BI (2/3 Stop) 2
SB (i) amount of shots for each bracketing serie TM SB BI (1 Stop) 3
BI (s) select Bracketing increment   TM SB BI (1 1/3 Stop) 4
TD (cs) Starting value of 1st Exposure (Display Selection) TM SB BI (1 2/3 Stop) 5
TR  (cs, csl, css) Register values       SB BI (2 Stops) 6
  SB BI (2 1/3 Stops) 7
  SB BI (2 2/3 Stops) 8
  SB BI (3 Stops) 9
  SB BI (3 1/3 Stops) 10
    BI (3 2/3 Stops) 11
Sequence: Example 1:
(here all in milliseconds only, should be microseconds)
Selections:
Selection limted to Values in Range assigned by
Preset as default TM time between Mirror-up and shots taken 1,2,3,4,5 user 2  
Preset as default BI select Bracketing increment 1,2,3,4,5,6,7,8,9,10,11 user 3 (1 Stop)
Preset as default SB amount of shots for each bracketing serie 1,2,3,4,5,6,7,8,9,10 user 5  
varies for each series TD Starting value of the 1st (longest) Exposure  user 8 sec. Initiate
calculated TR / TE Register (TR) value for corresponding Exposure Value (TR) 1st from Register# 48 8000 Take shot
TR / TE 2nd from Register# 45 4000 Take shot
TR / TE 3rd from Register# 42 2000 Take shot
TR / TE 4th from Register# 39 1000 Take shot
TR / TE 5th from Register# 36 500 Take shot
Example 2:
Selections:
Selection limted to Values in Range assigned by
Preset as default TM time between Mirror-up and shots taken 1,2,3,4,5 user 4  
Preset as default BI select Bracketing increment 1,2,3,4,5,6,7,8,9,10,11 user 6 (2 Stops)
Preset as default SB amount of shots for each bracketing serie 1,2,3,4,5,6,7,8,9,10 user 7  
varies for each series TD Starting value of the 1st (longest) Exposure  user 2 sec. Initiate
calculated TR / TE Register (TR) value for corresponding Exposure Value (TR) 1st from Register# 42 2000 Take shot
TR / TE 2nd from Register# 36 500 Take shot
TR / TE 3rd from Register# 30 125 Take shot
TR / TE 4th from Register# 24 32 Take shot
TR / TE 5th from Register# 18 8 Take shot
TR / TE 6th from Register# 12 2 Take shot
TR / TE 7th from Register# 6 0.5 Take shot
Example 3:
Selections:
Selection limted to Values in Range assigned by
Preset as default TM time between Mirror-up and shots taken 1,2,3,4,5 user 3  
Preset as default BI select Bracketing increment 1,2,3,4,5,6,7,8,9,10,11 user 2 (2/3 Stop)
Preset as default SB amount of shots for each bracketing serie 1,2,3,4,5,6,7,8,9,10 user 9  
varies for each series TD Starting value of the 1st (longest) Exposure  user 15 sec. Initiate
calculated TR / TE Register (TR) value for corresponding Exposure Value (TR) 1st from Register# 51 15000 Take shot
TR / TE 2nd from Register# 49 9666.666667 Take shot
TR / TE 3rd from Register# 47 6666.666667 Take shot
TR / TE 4th from Register# 45 4000 Take shot
TR / TE 5th from Register# 43 2666.666667 Take shot
TR / TE 6th from Register# 41 1666.666667 Take shot
TR / TE 7th from Register# 39 1 Take shot
TR / TE 8th from Register# 37 600 Take shot
TR / TE 9th from Register# 35 3.75 Take shot