Even though we ARE Nikon lovers,we are NOT affiliated with Nikon Corp. in any way.

English German French

Sign up Login
Home Forums Articles Galleries Recent Photos Contest Help Search News Workshops Shop Upgrade Membership Recommended
members
All members Wiki Contests Vouchers Apps Newsletter THE NIKONIAN™ Magazines Podcasts Fundraising

SB-700 TTL Selection Using Spot Metering?

Arkayem

Richmond Hill, GA (Savannah), US
6107 posts

Click to send email to this author Click to send private message to this author

"RE: SB-700 TTL Selection Using Spot Metering?"

Arkayem Moderator Awarded for his high level skills in flash photography Charter Member
Sat 24-Nov-12 02:05 PM | edited Sat 24-Nov-12 02:07 PM by Arkayem

>>>When your camera is set to spot meter and the SB-700
>is
>>in
>>>TTL, the camera will meter on the focus point and
>send
>>that
>>>info to the flash.
>>
>>Actually, in regular TTL mode, no camera metering
>information
>>is sent to the flash. In regular TTL mode, the flash
>power
>>setting is calculated strictly from the monitor preflash.
>The
>>metering value or mode on the camera will make no
>difference
>>to the flash power.
>
>Hi
>Damn it, I thought I understood this but now I dont. I know
>that I have to select Spot Metering mode to force the gun off
>TTL-BL and into TTL mode. But what metering mode is is being
>used to work out info from the pre-flash?

When using flash in Regular TTL mode, the reflected energy from the preflash is always measured center-weighted across the entire frame, regardless of the metering mode of the camera. In Regular TTL mode, the metering mode in the camera is only used for determining the aperture/shutter combination and has no impact on the flash metering.

There is no communication between the flash metering and the camera metering when using Regular TTL mode. The flash sets the entire exposure based on the preflash, and ambient light has no impact on this measurement. This is why it is best to use the camera in Manual mode when using regular TTL and set the ambient exposure to be about 3 stops underexposed based on the camera meter. Then, the flash will effectively make the entire exposure on the subject (the background will be mostly ambient).

This works entirely differently when using TTL-BL, and the approach you use should also be entirely different.

Russ
Retired Professional Photographer
Nikonian Moderator
Russell MacDonald Photography
Nikon CLS Practical Guide

This is a hot, active topic! SB-700 TTL Selection Using Spot Metering? [View all] , richlewt , Thu 22-Nov-12 03:27 PM
Subject
ID
Reply message RE: SB-700 TTL Selection Using Spot Metering?
1
Reply message RE: SB-700 TTL Selection Using Spot Metering?
2
Reply message RE: SB-700 TTL Selection Using Spot Metering?
3
Reply message RE: SB-700 TTL Selection Using Spot Metering?
4
Reply message RE: SB-700 TTL Selection Using Spot Metering?
6
Reply message RE: SB-700 TTL Selection Using Spot Metering?
8
Reply message RE: SB-700 TTL Selection Using Spot Metering?
5
Reply message RE: SB-700 TTL Selection Using Spot Metering?
7
Reply message RE: SB-700 TTL Selection Using Spot Metering?
9
     Reply message RE: SB-700 TTL Selection Using Spot Metering?
10
          Reply message RE: SB-700 TTL Selection Using Spot Metering?
11
               Reply message RE: SB-700 TTL Selection Using Spot Metering?
12
                    Reply message RE: SB-700 TTL Selection Using Spot Metering?
13
                         Reply message RE: SB-700 TTL Selection Using Spot Metering?
14
                              Reply message RE: SB-700 TTL Selection Using Spot Metering?
15
                              Reply message RE: SB-700 TTL Selection Using Spot Metering?
16
                                   Reply message RE: SB-700 TTL Selection Using Spot Metering?
17
                                        Reply message RE: SB-700 TTL Selection Using Spot Metering?
18
                                             Reply message RE: SB-700 TTL Selection Using Spot Metering?
19
                                                  Reply message RE: SB-700 TTL Selection Using Spot Metering?
20
                                                  Reply message RE: SB-700 TTL Selection Using Spot Metering?
21
                                                  Reply message RE: SB-700 TTL Selection Using Spot Metering?
22
                                                  Reply message RE: SB-700 TTL Selection Using Spot Metering?
23
Reply message RE: SB-700 TTL Selection Using Spot Metering?
24