Need help on auto iso(D200) used with built-in/external(SB800) flash!

[rexlim]

Hi all,
I encountered a problem(or maybe not, don't know if I'm missing settings ) with D200 auto iso function(custom setting b1) when used with either the built-in or external (SB800) flash. Without using flash, auto iso works perfectly fine!

With ref to D200 manual pg 152-153, 180, it mentioned, when auto iso is set to 'ON', "ISO sensitivity will automatically be adjusted as required for optimal flash output."
NOTE: my ISO setting is set to 100(in manual, it says MUST be <1600).

With ref to manual pg 178 table, it mentioned, using with SB800, auto ISO feature is available, BUT I just can't get it working once any flash is used(built-in or external).

Any1 encountered the same problem?
Did I missed out some setting that I shd?
Pls help!
TIA!!!

[mega32]

Don't understand your question.

What do you want to acheive ?

[ExplorerZ]

Originally Posted by rexlim Hi all, I encountered a problem(or maybe not, don't know if I'm missing settings ) with D200 auto iso function(custom setting b1) when used with either the built-in or external (SB800) flash. Without using flash, auto iso works perfectly fine! With ref to D200 manual pg 152-153, 180, it mentioned, when auto iso is set to 'ON', "ISO sensitivity will automatically be adjusted as required for optimal flash output." NOTE: my ISO setting is set to 100(in manual, it says MUST be <1600). With ref to manual pg 178 table, it mentioned, using with SB800, auto ISO feature is available, BUT I just can't get it working once any flash is used(built-in or external). Any1 encountered the same problem? Did I missed out some setting that I shd? Pls help! TIA!!!

i don't get it as well... how do you know it is not working?

[CT 3833]

I tried on my D80/SB800 and found to have the same behaviour. I suspect, when the flash light is switched on, the camera assumes that the flash light is sufficient to fire sufficient exposure with the default ISO(assuming ISO200 like yours), so it will no up the ISO automatically as compared to when the flash is off.
Not sure my assumption is correct, and if anyone could advise, under what circumstances the auto ISO will work with a flash on.

[mega32]

How about trying this
ISO 100
Auto Iso Shutter Speed 1/250
A mode
F22
turn on the flash i-ttl mode

What is the result ?
Will the auto iso work ?

[Squid]

Originally Posted by rexlim Hi all, I encountered a problem(or maybe not, don't know if I'm missing settings ) with D200 auto iso function(custom setting b1) when used with either the built-in or external (SB800) flash. Without using flash, auto iso works perfectly fine! With ref to D200 manual pg 152-153, 180, it mentioned, when auto iso is set to 'ON', "ISO sensitivity will automatically be adjusted as required for optimal flash output." NOTE: my ISO setting is set to 100(in manual, it says MUST be <1600). With ref to manual pg 178 table, it mentioned, using with SB800, auto ISO feature is available, BUT I just can't get it working once any flash is used(built-in or external).

Can you list the following settings. My experience is that the following settings affect each other
1. CSM > b1 ISO Auto --> ON, (what's your max ISO setting?) & (what's your shutter speed?)
2. CSM > e2 Flash shutter speed --> (what's your setting?)
3. Operation mode : (what is your selection : P or S or A?)

[zac08]

Read manual page 153 :

.... (the indicators do not blink if a flash is used).

I just tested mine.

Settings :

ISO 100
min shutter speed 1/30
Max ISO 800

when testing, I aimed it at the base of my table lamp. Without the flash, AUTO ISO was flashing and it was at ISO 640 to enable my minimum shutter speed of 1/30 @f4

and with the onboard flash, the AUTO ISO did not flash at all, and stuck at ISO 100 and a setting of 1/30 @f4.

This is so, due to sufficient power from the flash, if there's not enough power from the flash, I believe the camera will then increase the ISO accordingly. But I have not tried tat out yet.

Cheers,

[mpenza]

move further away (more than what the flash range indicated on the flash) and see if the ISO changes.

[zac08]

Originally Posted by mpenza move further away (more than what the flash range indicated on the flash) and see if the ISO changes.

My room is pretty small... kinda tired to do any more testing for now. Anyone wanna carry on from here??

[mega32]

Try f8 or f16

[Squid]

Originally Posted by zac08 Read manual page 153 : .....when testing, I aimed it at the base of my table lamp. Without the flash, AUTO ISO was flashing and it was at ISO 640 to enable my minimum shutter speed of 1/30 @f4 and with the onboard flash, the AUTO ISO did not flash at all, and stuck at ISO 100 and a setting of 1/30 @f4......

My experience is that CSM e1 fastest shutter speed setting takes priority over CSM b1 setting's minimum shutter speed setting when the built-in flash is popped up or external flash is attached to D200 camera. So far, the only way to get faster shutter speed than 1/60s (the highest possible setting for CSM e1 setting) is to use shutter priority when D200 is attached to external flash.

[rexlim]

Originally Posted by Squid Can you list the following settings. My experience is that the following settings affect each other 1. CSM > b1 ISO Auto --> ON, (what's your max ISO setting?) & (what's your shutter speed?) 2. CSM > e2 Flash shutter speed --> (what's your setting?) 3. Operation mode : (what is your selection : P or S or A?)

1. Max ISO = 1600; Shutter speed = 1/60 s

2. CSM e2 = 1/60 s

3. Operating mode = A

[rexlim]

Originally Posted by mega32 How about trying this ISO 100 Auto Iso Shutter Speed 1/250 A mode F22 turn on the flash i-ttl mode What is the result ? Will the auto iso work ?

Originally Posted by mega32 Try f8 or f16

Tried ur suggestion...
Auto ISO still don't work?
Still show 100 (set by me on ISO setting)
Exposure display show +<......|||||||>- (under)

[CT 3833]

Though I couldnt find any article abut auto ISO with flash, I strongly believe that auto ISO does not work in flash mode, at least on D80. You may want to verify this, the auto ISO blinks on the LCD in normal mode but when the flash is switched on, it stops blinking. This probably indicate that the auto ISO is off, and the camera resorts to the default lowest ISO.

[mega32]

Originally Posted by rexlim Tried ur suggestion... Auto ISO still don't work? Still show 100 (set by me on ISO setting) Exposure display show +<......|||||||>- (under)

Sorry to ask ,did you take a picture with those setting ?

[CT 3833]

with reference to this >>>>>Exposure display show +<......|||||||>- (under)
the exposure will only be measured/determined when the camera fire a pre-flash, so it is not unusual to see under exposed bar as above in a low light condition.

Auto ISO is partly used to adjust ISO value automatically to suit the preset condition(min shutter etc) condition, this allow a shot to be taken without a flash, so I still believe that auto ISO will not work in flash mode.

I believe the D200 sync up to 1/250 with flash, so the auto ISO might be disabled for just another reason.

[rexlim]

Originally Posted by CT 3833 Though I couldnt find any article abut auto ISO with flash, I strongly believe that auto ISO does not work in flash mode, at least on D80. You may want to verify this, the auto ISO blinks on the LCD in normal mode but when the flash is switched on, it stops blinking. This probably indicate that the auto ISO is off, and the camera resorts to the default lowest ISO.

But on the table shown on pg 178 of the manual, very obviously it says AUTO ISO feature is available...

1 more question: How do 1 know the if AUTO ISO is working with flash on? Any indication?

[mega32]

Quote: 1 more question: How do 1 know the if AUTO ISO is working with flash on? Any indication?

Take a picture and check the EXIF data.

[CT 3833]

saw this on the web...http://www.bythom.com/d200guideerrata.htm
it says....
....
In the section on Auto ISO I mention that this function is ignored when flash is active. Actually, it isn't, though the way the camera performs is confusing. Auto ISO still activates with flash, but only if you have hit the range limit for the flash. In other words, if the camera thinks that the flash can give enough light for the subject, the ISO isn't boosted. But if the camera thinks that the flash doesn't have enough power to light the subject, ISO will be boosted if Auto ISO is On. This is easier to see and anticipate with an external flash on the camera that has a Distance Range indicator, as does the SB-800. Once your subject is beyond the maximum distance indicated by the SB-800, Auto ISO kicks in. With the internal flash, you'll need to memorize the table on page 505 in order to be able to anticipate the Auto ISO changes with flash active (yuck).

[rexlim]

Originally Posted by CT 3833 saw this on the web...http://www.bythom.com/d200guideerrata.htm it says.... .... In the section on Auto ISO I mention that this function is ignored when flash is active. Actually, it isn't, though the way the camera performs is confusing. Auto ISO still activates with flash, but only if you have hit the range limit for the flash. In other words, if the camera thinks that the flash can give enough light for the subject, the ISO isn't boosted. But if the camera thinks that the flash doesn't have enough power to light the subject, ISO will be boosted if Auto ISO is On. This is easier to see and anticipate with an external flash on the camera that has a Distance Range indicator, as does the SB-800. Once your subject is beyond the maximum distance indicated by the SB-800, Auto ISO kicks in. With the internal flash, you'll need to memorize the table on page 505 in order to be able to anticipate the Auto ISO changes with flash active (yuck).

Got the picture liao!
Thx, CT!