[hanny]

CAN ANY -HING KNOW
WHAT IS THE DIFFERENT ON SB-800 OR 900
THE TTL AND TTL BL

BECAUSE WHEN I USE ONLY TTL ABOUT UNDER 2M FAR
WILL VERY EASY TO OVER FLASH

BUT IF I M USING TTL BL WILL NOT HAVE THIS PROBLEM
I READ THE MENU BUT I DO NOT TOO UNDER STAND WHAT IS THE DIFFERENT

WAITING FOR ANY HELP

THANK YOU VERY MUCH

[thomasyu]

TTL系控制被摄主体的闪光曝光量，TTLBL是控制整个画面（包括背景）的闪光曝光量

[thomasyu]

BL＝BALANCE，注意:TTL BL不能用于点测光，点测光会自动变成TTL

[hanny]

THANK YOU VERY MUCH

BUT 被摄主体 DEPEND ON WHAT ??

IS THE ONE YOU FOCUS OR IN THE PICTURE BIGGEST FOCUS AREA ?

THANK YOU

[thomasyu]

被摄主体指对焦主体

[hanny]

被摄主体指对焦主体

BUT I DON'T KNOW WHY I AWAYS MAKE A VERY SERIOUS OVER
ON TTL WHEN I SET THE FOCUING POINT TO A CHARACTER AND DIRECTLY SHOOT BY SB-800 ON TTL MODE WITH 24~70 OR 17~55 DX

BUT IF I M USING TTLBL WITH LEASE OR NO THIS PROBLEM

IS IT THE BACK GROUND TOO CLOSE TO THE CHARACTER ?

THANK YOU

[snoopybee]

Under 2m ... one basic question, how did you position the flash? Pointing directly to your subject, or pointing elsewhere using the light's reflection?

[hanny]

IF BOUNCEING TTL IS OK

BUT IF USING A REFLEX WHITE BORAD

OR DIRECT TO <USEING A SOFT LIGHT COVER OR NOT>

[thomasyu]

TTL模式则只保证对焦主体曝光正确。当主体与背景有一定距离，且两者的反差达到一定程度的时候，主体的曝光就就可能是过曝的了

[hanny]

thank you

[eastwest8888]

我曾問過 nikon cs人員,SB-800用在D700近距離是會有over出現,但在2米以外的景物或人象就無問題,而因為發現有問題才出SB-900,因為SB-900可以自動在近距離 cut out改善咗好多

[thomasyu]

我用SB900一样近距离过曝，后来发现吴用TTL，用用闪灯中的A模式闪光就无问题

[hanny]

I USE SB-800 ON D300 BY TTL MODE AWAYS OVER FLASH
BUT IF TTL-BL NO THIS PROBLEM

SO I WONDER TTL MODE FOR WHAT ?

[hanny]

after check ttl is a old desgin in sb-800 or sb-900

the meaning of i-ttl is =ttl bl

and the body build in flash is also running at ttl bl