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Author Topic: Square white diffuser came with camera XF IQ4 150. What is it for?  (Read 1299 times)

CMAmuseumbrich4d

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We have three IQ4 150 systems on the XF. Purchase in 2019. One more system, exactly the same was purchased in 2021 but came with square white diffuser. (5.5"/140mm) I can't find any information about when to use this. Is if for white balance? Is it for LCC for a wide angle lens? Why did it not come with the earlier cameras? Would love to see something in print as to what it is and also how to order another one.
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ericstaud

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narikin

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Re: Square white diffuser came with camera XF IQ4 150. What is it for?
« Reply #2 on: February 03, 2023, 01:38:33 pm »

Hah - its indeed the LCC diffuser tool.

Take an images with that in front of the lens, before every session, at the working aperture/ camera/lens combo in use, to:
(a) remove any color casts*
(b) delete any sensor dust
Open up ~2stops (shutter speed, not aperture) to get the right exposure with it.

Its very useful and good workflow practice to do it every session
If you forget, its ok, just use a prior LCC capture, but the sensor dust will likely not be accurate.

apply the LCC to every image in that session, for improved results. It does make a difference!

(*not just wide angle lenses - even standard lenses have some color cast to them as you move away from center)


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CMAmuseumbrich4d

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Re: Square white diffuser came with camera XF IQ4 150. What is it for?
« Reply #3 on: February 24, 2023, 04:24:21 pm »

Thanks!
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Balafre

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