Please help, Auto Holy Grail results too dark

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tokyoshot
Posts: 3
Joined: 08 Feb 2021, 21:21

Please help, Auto Holy Grail results too dark

Post by tokyoshot »

Hello,

today I was shooting a blue hour-to-night transition using ControlMyCamera, iPhone 11 and R5.
Shooting interval 5", longest exposure set to 2", electronic shutter 1st curtain, using Canon TC-80N3 intervalometer.
Initial capture settings were 1/5, F4 and ISO 100 - slightly underexposed in order not to protect highlights.
Auto holy grail and NTC (2.0) were selected and I've started the sequence. After I've noticed images got too dark I have manually corrected the exposure on the camera (the + button in ControlMyCamera didn't react). Even though the sequence was underexposed around 2,5 stops at the end - the initial settings didn't change at all.

I've already successfully accomplished several holy grail transitions with the same setup so I'm really confused what happened.
I would be very grateful to get some advice.

Thanks in advance.
Krzysztof
www.tokyoshot.com
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hubaiz
Site Admin
Posts: 2001
Joined: 27 Jan 2015, 18:58

Re: Please help, Auto Holy Grail results too dark

Post by hubaiz »

According your last image the 'Auto holy grail' was not enabled.
tokyoshot
Posts: 3
Joined: 08 Feb 2021, 21:21

Re: Please help, Auto Holy Grail results too dark

Post by tokyoshot »

Thank, it’s correct. I’ve taken this screenshot after going in full manual mode adjusting the camera by myself. Before that it was activated. I should have written that in my original post.
hubaiz
Site Admin
Posts: 2001
Joined: 27 Jan 2015, 18:58

Re: Please help, Auto Holy Grail results too dark

Post by hubaiz »

Ok, does the intervalometer enable the camera autofocus between the captures?
tokyoshot
Posts: 3
Joined: 08 Feb 2021, 21:21

Re: Please help, Auto Holy Grail results too dark

Post by tokyoshot »

I was using Canon TC 80N3, always trying to allow at least 2" between the longest shutter speed end the end of the given interval.
Today I started 3 new sequences with Auto Holy Grail.
-4" longest shutter speed and 15" interval: worked out perfectly
-6" longest shutter speed and 15" interval: worked out perfectly
-6" longest shutter speed and 8" interval: didn't work

So, ok, that could be an explanation for today - 2" were not enough.
But yesterday I had an 5" interval and the shutter speed didn't exceed 1/5".
I'll be getting the LRT Pro Timer on Friday anyway, maybe my problem would get solved by the new intervalometer.

Thank you for your support!
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