Spot area and FEL for TTL metering with Sony A7RII
I’ve been experimenting with the metering and Flash Exposure Lock (FEL) options available with my A7RII and Nissin Air System TTL speedlites.
What I’ve learned is that its possible to select any of the three metering area modes; Multi, Center, or Spot for use when using TTL speedlites. Selecting Spot, especially when using FEL to set the flash exposure via TTL offers some useful capabilities.
Here are three examples to show the impact;
This was metered by placing the spot metering circle on Manny’s nose. Reading the exposure from the middle of the frame. The metering area was large enough to include some highlights as well as some shadows. So a reasonable exposure
This next frame was metered by placing the spot metering circle on Manny’s check that was on the highlight side considering the lighting setup. Without Flash Exposure Compensation (FEC) the result is significant under exposure. Being able to spot meter for the highlights ensures being able to meter and set the exposure via FEL to protect highlights from being over exposed.
This third frame was metered by placing the spot metering circle on Manny’s check on the shadow side. To increase the ratio I placed a large piece of black form core just outside the frame camera right. Without Flash Exposure Compensation (FEC) the result is significant over exposure. Being able to spot meter for the shadows ensures being able to meter and set the exposure via FEL to protect shadows from being blocked up without detail.
One additional benefit available when combining the spot area with FEL for TTL flash metering is taking advantage of zooming to get close enough to the subject to make the area metered more selective. Because the FEL exposure reading is held in the camera until the button is pressed to release it, one can move closer to the subject to take a very precise exposure reading and then return to the shooting position.
To implement this capability I set the button inside the AF/MF selector switch to FEL toggle. Then select the spot area in the metering area options. (I have that set to an FN menu position to make it easier to access and change.
Give it a try and Enjoy!