Should the flashes be moved together with the camera?

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Adalbert
Posts: 1255
Joined: Mon Nov 30, 2015 1:09 pm

Should the flashes be moved together with the camera?

Post by Adalbert »

Hello everybody,
I have completed the components for my new vertical setup.
I’m still thinking about the mounting of the motor (belt or shaft coupling) and of the flashes.

In this solution the camera is mounted to the rail and is moved during the stacking-session.
QUESTION: should the flashes be moved too ?

BR, ADi

lonepal
Posts: 321
Joined: Sat Jan 28, 2017 12:26 pm
Location: Turkey

Post by lonepal »

Hi;

If you move the flashes you will aslo change the exposure/lighting.

When the flashes are closer to the subject they illuminate the subject more.

You should keep the subject-illuminator (flash, LED light etc.) distance stable to have same exposure at all steps while stacking.
Regards.
Omer

Adalbert
Posts: 1255
Joined: Mon Nov 30, 2015 1:09 pm

Post by Adalbert »

Hi Omer,
If you move the flashes you will aslo change the exposure/lighting.
Probably you're right.
BR, ADi
Last edited by Adalbert on Thu Jan 17, 2019 8:27 am, edited 1 time in total.

ChrisR
Site Admin
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Joined: Sat Mar 14, 2009 3:58 am
Location: Near London, UK

Post by ChrisR »

If the subject doesn't move, then to keep the same subject lighting, the flashes shouldn't move. Camera + lens, do move.

What are we missing?
Chris R

johan
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Joined: Tue Sep 06, 2011 7:39 am
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Post by johan »

Bottom line keeping the flash to subject distance constant also means constant illumination which is what you want.
My extreme-macro.co.uk site, a learning site. Your comments and input there would be gratefully appreciated.

Adalbert
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Joined: Mon Nov 30, 2015 1:09 pm

Post by Adalbert »

Hello Chris, hello Johan,
I was a little bit confused, because I have moved the object up to now :-)
BR, ADi

Lou Jost
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Location: Ecuador
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Post by Lou Jost »

It's not just about the light intensity (whose variations can be corrected in Zerene if they are small). The shapes of shadows and especially the reflections change as you move the lights. That could spell disaster for some subjects.

Adalbert
Posts: 1255
Joined: Mon Nov 30, 2015 1:09 pm

Post by Adalbert »

Hi Lou,
You are right.
I have mistaken my old setup (moved object) for my new setup (moved camera).
BR, ADi

Macro_Cosmos
Posts: 1037
Joined: Mon Jan 15, 2018 9:23 pm
Location: Sydney

Post by Macro_Cosmos »

Move subject: flashes have to move with it.
Subject stationary: don’t move flash.

This applies to ring light add ons and the such, things that can be mounted on the lens.

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