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Jun 18, 2019 14:52:52   #
E.L.. Shapiro Loc: Ottawa, Ontario Canada
 
brooklyn-camera I wrote:
Isopropyl Alcohol had no effect, had this in the vanity in the bathroom under the sink. Thanks for your reply's.


Ok then, time for acetone on a Q- tip. If that doesn't work, just leave it be and forget about it! As we used to say in Bedford-Stuyvesant and Williamsburg, leave well enough alone. It ain't gonna give you a black spot in you flash pictures!

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Jun 18, 2019 16:57:40   #
jeep_daddy Loc: Prescott AZ
 
brooklyn-camera I wrote:
Was shooting with 6D MKII and a 40mm prime and the ORLIT RT-600c. When taking off the flash I noticed a black spot on the diffuser pullout from the flash. I have never seen or heard of this happening, I give up. Was this a solar eclipse on my flash? See attached photos of what I mean. I tried cleaning the diffuser with no luck.... really not a bigger for me. Just wanted to see if anyone else ever had this happen to the flash?
Was shooting with 6D MKII and a 40mm prime and the... (show quote)


It never happened to me, but I bought 2 of those and they were both hinky and had defects so I just sent them back to Adorama yesterday. I must have gotten the last 2 they had at the blowout price of $49.99 ea and now they aren't available now.

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Jun 18, 2019 16:57:58   #
Photocraig
 
Ya know, you can cut a diffusing panel out of a plastic milk or juice container (cut part of the corner to give a place to tape on top) and tape it over the flash to get the same results. So you're right, not a biggie. I also agree with EL. that even a dot like this on the diffusing panel will not cause any shadow with the flash.

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Jun 18, 2019 23:30:51   #
DaveyDitzer Loc: Western PA
 
E.L.. Shapiro wrote:
More about acetone:

The lenticular lenses on older flash gear may become dirty or yellowed with age. I routinely clean them with acetone and I have 25 year old speedlights that operate perfectly and have clean undamaged diffusers . I am careful not to get any of the liquid on other parts of the housing because they may be made of thermoplastics can can re-dissolve in the presence of solvents.

I wouldn't recommend anythg that is harmful when used sparingly and properly. With acetone, like Brylcreem (remember that greasy kid stuff) "a little dab will do ya...just rub it in your hair and the ladies will peruse ya"!

Please do not rub acetone into your hair! Always use solvents in a well ventilated area! All cleaners shoud be tested on a small inconspicuous section of whatever you are cleaning!

Oh, notice my handy bottle of acetone is an a PLASTIC container with plastic cap!
More about acetone: br br The lenticular lenses o... (show quote)


There is no such thing as a generic plastic. Your container is likely a polyolifin whereas the diffuser might be a styrene compound which acetone can degrade. Isopropynol is more benign. If the solvent frosts the surface is likely much weaker and subject to breakage.

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