metallop.blogg.se - Disable zoom flash

#DISABLE ZOOM FLASH MANUAL#

Direct flash often meters flash too bright on foreground subject, because Inverse Square Law causes dark backgrounds, or possibly dark shadows, which the flash metering also sees, and wants to brighten.

Camera reflective light meters are the same old problem as always, see How Light Meters Work (this white background below needs a little +EV flash compensation), but I am ignoring that aspect here.

Because zoom lenses report distance inaccurately, or an off-camera flash really has little chance of being at the same distance.

#DISABLE ZOOM FLASH MANUAL#

So for cases of flash in dim ambient indoors (level too low to matter what it is), or in camera Manual mode (Spot cannot change camera settings), Spot metering to convert TTL BL to be TTL flash can be a good thing (even though the flash system does not use Spot metering itself).Ī main cause of the TTL BL direct flash underexposure problem is when the reported D-lens distance is less than the actual flash distance. Ambient metering can influence TTL BL level (balanced flash), but for flash, Spot metering shifts flash metering from TTL BL to be TTL mode (not affected by ambient levels). The three camera metering modes (Matrix, Center Weighted, Spot) are only about ambient light - the flash system uses its own central metering system instead. There is also a regular not-balanced mode called TTL.

Basics Note: The flash menus generically say TTL (Through The Lens metering), but the Nikon system specifically actually defaults to be TTL BL (balanced flash mode).