D850 in Live View mode, flash on TTL, non-CPU lens: "err"

Started 4 months ago | Questions
RafaelD7
RafaelD7 Senior Member • Posts: 2,182
D850 in Live View mode, flash on TTL, non-CPU lens: "err"

I was trying to take macro pictures with my D850 and the Laowa 60mm f/2.8 lens. The lens is fully manual (no electronics at all). With flash, I usually have my SB-800 flash on manual, at about 1/8 power, and everything works fine, either in Live View or normal mode.

Yesterday, I was curious to see if using the flash in TTL or TTL-BL modes would give good results. Things are OK if I shoot in normal mode (looking through the viewfinder), BUT if I switch to Live View, something weird happens. When I press the shutter button the flash fires but then...nothing. The LCD screen on top of the camera flashes the "err" message. The shutter button does not work, nor does the LV button. At this point, I have to turn off the camera (to get it off Live View). When I turn it back on, the "err" message is still on the LCD but at this point I can press the shutter button and the message disappears, everything goes back to normal.

I have repeated this several times with the same results. I tried this with CPU lenses and there is no problem there, flash works in TTL and TTL-BL in Live View.

Is there a reason why TTL does not work in Live View with a non-CPU lens?

Thanks!

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Regards,
Rafael
It's not what your camera can do for you - it's what you can do with your camera.
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 RafaelD7's gear list:RafaelD7's gear list
Nikon D850 Nikon AF Nikkor 50mm f/1.4D Nikon AF-S Micro-Nikkor 105mm F2.8G IF-ED VR Sigma 150-600mm F5-6.3 | C Tamron 15-30mm F2.8 +1 more
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Nikon D850
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RafaelD7
OP RafaelD7 Senior Member • Posts: 2,182
Error with D850 in Live View mode, flash on TTL, non-CPU lens

Anybody?

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Regards,
Rafael
It's not what your camera can do for you - it's what you can do with your camera.
Instagram: @rafaelaviles
http://www.pbase.com/aviles
http://www.pbase.com/image/100392697.jpg

 RafaelD7's gear list:RafaelD7's gear list
Nikon D850 Nikon AF Nikkor 50mm f/1.4D Nikon AF-S Micro-Nikkor 105mm F2.8G IF-ED VR Sigma 150-600mm F5-6.3 | C Tamron 15-30mm F2.8 +1 more
Wahrsager
Wahrsager Veteran Member • Posts: 3,180
Re: Error with D850 in Live View mode, flash on TTL, non-CPU lens

RafaelD7 wrote:

Anybody?

“Laowa 60mm f/2.8 lens. The lens is fully manual (no electronics at all)”

Maybe asking in a macro forum would get you an expert answer.

I can only guess that since live view focuses via pixel edge (I think) rather than a separate phase detect mechanism, the third-party lens with no electronics isn’t giving the camera the information (such as distance) it needs to guarantee an exposure based on what you put in it.

This site may not answer your question, but there is a treasure trove of information about Nikon TTL in it:

https://scantips.com/

 Wahrsager's gear list:Wahrsager's gear list
Nikon D4S Nikon D500 Nikon D5 Nikon Z6 Nikon D6 +30 more
Nikonlinks Contributing Member • Posts: 552
Re: Error with D850 in Live View mode, flash on TTL, non-CPU lens

Did you have the non cpu lens set for focal length and aperture in the camera?

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don
www.donferrario.com

RafaelD7
OP RafaelD7 Senior Member • Posts: 2,182
Re: Error with D850 in Live View mode, flash on TTL, non-CPU lens

Wahrsager wrote:

RafaelD7 wrote:

Anybody?

“Laowa 60mm f/2.8 lens. The lens is fully manual (no electronics at all)”

Maybe asking in a macro forum would get you an expert answer.

I can only guess that since live view focuses via pixel edge (I think) rather than a separate phase detect mechanism, the third-party lens with no electronics isn’t giving the camera the information (such as distance) it needs to guarantee an exposure based on what you put in it.

This site may not answer your question, but there is a treasure trove of information about Nikon TTL in it:

https://scantips.com/

Thank you very much, good points. I suspected that the lack of distance information could be the cause, but then I didn't understand why it worked OK when shooting in normal (not Live View) mode through the viewfinder.

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Regards,
Rafael
It's not what your camera can do for you - it's what you can do with your camera.
Instagram: @rafaelaviles
http://www.pbase.com/aviles
http://www.pbase.com/image/100392697.jpg

 RafaelD7's gear list:RafaelD7's gear list
Nikon D850 Nikon AF Nikkor 50mm f/1.4D Nikon AF-S Micro-Nikkor 105mm F2.8G IF-ED VR Sigma 150-600mm F5-6.3 | C Tamron 15-30mm F2.8 +1 more
RafaelD7
OP RafaelD7 Senior Member • Posts: 2,182
Re: Error with D850 in Live View mode, flash on TTL, non-CPU lens

Nikonlinks wrote:

Did you have the non cpu lens set for focal length and aperture in the camera?

Thank you, and yes, the lens is set in the camera and works well in all the shooting modes.

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Regards,
Rafael
It's not what your camera can do for you - it's what you can do with your camera.
Instagram: @rafaelaviles
http://www.pbase.com/aviles
http://www.pbase.com/image/100392697.jpg

 RafaelD7's gear list:RafaelD7's gear list
Nikon D850 Nikon AF Nikkor 50mm f/1.4D Nikon AF-S Micro-Nikkor 105mm F2.8G IF-ED VR Sigma 150-600mm F5-6.3 | C Tamron 15-30mm F2.8 +1 more
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