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Thread started 15 May 2013 (Wednesday) 13:47
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Expodisc : what size?

 
lapino
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May 15, 2013 13:47 |  #1

See my sig for lenses, what expodisc size should I buy? Or do I need one for every filter size??


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iazybandit
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May 15, 2013 13:52 |  #2

You can buy one for your lens that has the biggest filter size and use it for the other lenses. It won't clip on but you'll have to hand hold it.


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bratkinson
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May 16, 2013 06:05 |  #3

Or use a step-up ring (or two) to achieve the filter diameter of the Expodisk. I've used both methods. Hold it and step up. As it's only a single shot in each direction, holding it works the fastest.


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ElectronGuru
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May 24, 2013 08:56 |  #4

+

Get one, as big or bigger than your largest lens. Attach it to your camera strap and swing it into place for each calibration shot.


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irishman
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May 24, 2013 11:53 |  #5

Save your money and put it to a new lens.


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SkipD
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May 24, 2013 15:57 |  #6

A simple gray card is much less expensive than an Expodisc and far more versatile as well.


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Mark1
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May 24, 2013 19:13 |  #7

Color Checker passport!


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Jon
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May 24, 2013 22:37 |  #8

SkipD wrote in post #15964056 (external link)
A simple gray card is much less expensive than an Expodisc and far more versatile as well.

Mark1 wrote in post #15964535 (external link)
Color Checker passport!

Either or both of these - and I use both every time I shoot nowadays.


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CyberDyneSystems
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May 24, 2013 23:14 |  #9

Melitta #4 :)

And a gray card.


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Wilt
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May 25, 2013 01:32 |  #10

CyberDyneSystems wrote in post #15965064 (external link)
Melitta #4 :)

And a gray card.

I've wondered about the claims of the suitability of a Melitta filter, so I just did this test...

First the grey card used with LR tool...

IMAGE: http://i69.photobucket.com/albums/i63/wiltonw/WBgreycard_zpsa9d87877.jpg
WB Temp 2900K, tint +10

Next the Melitta #4...
IMAGE: http://i69.photobucket.com/albums/i63/wiltonw/WBMelitta4brwn_zpsc34ceb3c.jpg
WB Temp 2250, tint +4 ...not close!


Oh waitaminute, you didn't mean the BROWN one! :lol: ;) <tongue firmly in cheek>
IMAGE: http://i69.photobucket.com/albums/i63/wiltonw/Melitta4brwn_zpsd6bc0fb0.jpg

OK, a WHITE Melitta #4...
IMAGE: http://i69.photobucket.com/albums/i63/wiltonw/WBMelitta4wht_zpseab6676c.jpg
WB Temp 2800K, tint +11
The white Melitta is pretty dang close to a grey card in its WB value!
:cool:

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CyberDyneSystems
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May 27, 2013 12:07 |  #11

I've only been sayin' that for 8 years or so... :)

For "expo disk" style use, (shoot through) I find stacking two gets you there quite nicely.

Thanks for the test though, I've just done it, and never measured. I just know my WB always "seems" spot on.


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May 27, 2013 12:25 |  #12

CyberDyneSystems wrote in post #15972248 (external link)
I've only been sayin' that for 8 years or so... :)

I haven't been curious enough in the past to take the time to test!


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Expodisc : what size?
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