significant different exposure between D610 and D750 with off camera flash

I have the same issue with my Canons. Nothing I learned about how one camera handles exposure helps at all with the other. Different lenses also change exposure as do different kinds of light, and they all affect the different cameras differently.

All I can suggest is to take a test photo and chimp to get your exposure right whenever anything changes.

--
Ed Rizk

Hi there, yeah it's a puzzle..... from the images on the camera screens it looks like the D610 on camera flash has triggered the remotes but has not contributed to the exposure. The person (you?) Is not being lit from the front at all.

I would suggest that you check the flash contacts and ensure they are clean and making good connections on the 610. Then repeat to see if that improves the issue.

Have you tried setting the flashes to manual, adjusting the flash output until you achieve a good exposure on the 750, then applying those settings to the D610. I would expect the 2 images to be identical. It's also possible I suppose that the ISO settings are not quite identical, but should not make as much difference as you are seeing.

How does the 610 behave with just the hot shoe mounted flash, for example taking party shots? Is it consistent and do you need to apply different levels of compensation?

If time permits I will experiment myself, although I have a D300 and D7200 and a SB700, just to see if they closely match.

Sorry can't offer any explanations, have you tried this question in the Nikon FF forum?

Peter

d50bsl said:

Hi there, yeah it's a puzzle..... from the images on the camera screens it looks like the D610 on camera flash has triggered the remotes but has not contributed to the exposure. The person (you?) Is not being lit from the front at all.

I would suggest that you check the flash contacts and ensure they are clean and making good connections on the 610. Then repeat to see if that improves the issue.

Have you tried setting the flashes to manual, adjusting the flash output until you achieve a good exposure on the 750, then applying those settings to the D610. I would expect the 2 images to be identical. It's also possible I suppose that the ISO settings are not quite identical, but should not make as much difference as you are seeing.

How does the 610 behave with just the hot shoe mounted flash, for example taking party shots? Is it consistent and do you need to apply different levels of compensation?

If time permits I will experiment myself, although I have a D300 and D7200 and a SB700, just to see if they closely match.

Sorry can't offer any explanations, have you tried this question in the Nikon FF forum?

Peter

Click to expand...

Thank you for the reply,

Yeah it looks like a timing issue, the flash is definitely going off on the speed lite and the two other lights,

I will clean the flash contacts to see if that helps, also I will try the manual suggestion as as you say it should be identical

Thanks again for the suggestions

Steven

image-in said:

d50bsl said:

Hi there, yeah it's a puzzle..... from the images on the camera screens it looks like the D610 on camera flash has triggered the remotes but has not contributed to the exposure. The person (you?) Is not being lit from the front at all.

I would suggest that you check the flash contacts and ensure they are clean and making good connections on the 610. Then repeat to see if that improves the issue.

Have you tried setting the flashes to manual, adjusting the flash output until you achieve a good exposure on the 750, then applying those settings to the D610. I would expect the 2 images to be identical. It's also possible I suppose that the ISO settings are not quite identical, but should not make as much difference as you are seeing.

How does the 610 behave with just the hot shoe mounted flash, for example taking party shots? Is it consistent and do you need to apply different levels of compensation?

If time permits I will experiment myself, although I have a D300 and D7200 and a SB700, just to see if they closely match.

Sorry can't offer any explanations, have you tried this question in the Nikon FF forum?

Peter

Click to expand...

Thank you for the reply,

Yeah it looks like a timing issue, the flash is definitely going off on the speed lite and the two other lights,

I will clean the flash contacts to see if that helps, also I will try the manual suggestion as as you say it should be identical

Thanks again for the suggestions

Steven

Click to expand...

Sorry is that Nikon forum you mention https://www.nikonforums.com/forums/ ?

Nikon D610 didn't sync properly with the flash.

Have you checked the sync mode settings on both cameras?

If your on-camera flash uses a pre-flash to establish the correct exposure then that will fire and trigger the slaves before the shutter opens. It wil also have measured the exposure based on all three flashes firing. The pre-flash is usually at a relatively low power, so measuring the total flash output will result in the actual flash exposure being set much lower than it should be. In addition, the slaves probably won't fire at all because their charge was used up before the shutter opened.

On my Fuji the flash mode for triggering slaves is called 'commander' mode. I don't know about Nikon kit.

--
Albert
The lazy photographer

image-in said:

Hi,

Here is my problem, thank you in advance,

- I have a controlled environment where the light is not changing,

- I have the same settings between a D610 and D750 as shown in images below

- both has Nikon 50mm 1.8g attached

- i am using the same Neewer Speedlite 750ii on both cameras (no settings are adjusted on this flash between changing camera)

- speedlite flash settings are TTL, +3

- A tripod is used so the camera potions are identical

- there two other lights which are set as slaves, so are triggered when the speed light goes off

- I have removed the speedlite from the camera and carried out the same experiment, the images appear to be identical when no flash is used, this is making me think its a flash issue

Both camera flashes seem to be of the same power when observing by eye

I have no idea what this may be, could someone please help,

Thanks again,

Steven

Click to expand...

There are three things that can change exposure in photography: the aperture, the exposure time and the amount of light coming from the scene (as modified by filters, lens transmittance, etc).

In your example, the aperture is the same, and assuming the same lens, the transmittance is the same. The camera's exposure time is the same. That leaves as the only possible cause that the amount of light coming from the scene, during the exposure time, was different.

I think there is a potential issues with your set up, using TTL flash in a multi-flash situation. As has been explained, TTL flash depends on a pre-flash, before the shutter opens, to measure the light. Slave flashes generally don't have TTL capability (even TTL flashes working as slaves) so best not to use TTL in this set-up.

What I suspect might be happening, is this - the camera controls the power of the pre-flash. The two cameras have different metering sensors, the D610 has 2016 pixel sensor and the D750 a 91,000 pixel sensor, considerably newer and likely more sensitive. What I'm guessing is that the D610 puts out a stronger pre-flash, which is strong enough to trigger the slaves. The camera therefore sees a lot of light, and for the main flash, commands the flash to give a very small flash. The D750 puts out a weaker preflash which doesn't trigger the slaves, the camera turns the main flash up, and for the shot gets the slaves as well.

Don't use TTL. See if that gives consistency between the two cameras. Then, control flash power manually.

You would need CLS capability on your flashes to control slaves with TTL exposure control.

--
Ride easy, William.
Bob