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Code Abstract:

comments:

default

generic counter1 (x)

0

inner loop

bracketed shots (+ / -)

Exposure Values from Camera

generic counter2 (y)

0

outer loop

**

Shortes Exposure (Light)

24

(register values)

**

longest Exposure (Dark)

57

(register values)

select i=(i)

select # of shots for bracketing

time Mirror-up (mu) t

4

seconds (4Mio micro-secs)

if i < 2

minimal Validation

write "increase exposure span"

Calculating operators

rounded

step (s)

do while y >= 2

begin bracketing

Delta (d)

16.5

17

Value in Register

shoot cs

take Center shot

Center shot (cs)

40.5

41

Value in Register

csl = cs

css = cs

EV

select one option for (i)

(i)

x=0

begin long exposure bracketing

1/3

16 1/2

17

1

do while x <= i

start 1st loop

2/3

8.25

8

2

mu(t)

move mirror up and wait

1

default (i)

5.5

6

3

csl = csl + s

increase exposure by adding step value s

1 1/3

4.125

4

4

shoot csl

take shot

1 2/3

3.3

3

5

x=x+1

2

selectable (i)

2.75

3

6

end do

2 1/3

2.357143

2

7

y=y+1

2 2/3

2.0625

2

8

3

selectable (i)

1.833333

2

9

x=0

begin short exposure bracketing

3 1/3

1.65

2

10

do while x <= i

start 2nd loop

3 2/3

1.5

2

11

mu(t)

move mirror up and wait

4

selectable (i)

1.375

1

12

css = css - s

decrease exposure by substracting step value s

shoot css

take shot

x=x+1

end od

**

go to the 'Transform' sheet and copy the frame in columns H,I,J to the corresponding value of 'cs'

y=y+1

end do

end of bracketing this image frame

Testing the code:

replace micros() with longer values to light up LEDs

critical:

can ARDUINO handle microseconds?

Yes, it can, but only when using the 'delay' function.