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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 19 Aug 2006 (Saturday) 14:33
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stupot
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Aug 19, 2006 14:33 |  #1

This question popped up recently so I thought I'd stick some of the info in here to help anyone out.

Basically, its possible to change the colour of your flashgun, and best of all it's free! First of all you have to order a free swatch book from Rosco that gives you a whole selection of colours to choose from, the great thing is that these are a perfect size to fit over your flashgun head.

The book looks like this,

IMAGE: http://www.rosco.com/images/filters/supergel.jpg

and it can be ordered from the UK site here: http://www.rosco.com/u​k/filters/index.asp (external link)

(couldn't find a link on the US site but I'm sure if you send them an email they will let you have a book!)
*EDIT=CDS* U.S. Web site ;
http://www.rosco.com/u​s/filters/index.asp (external link)
Links to request samples at bottom of each gel page.


Once you get your filters, you have to figure out a way to attach them to your flash head.


This is the method I have come up with

All you need is:
some duct tape
pair of pliers
paperclips

Firstly bend the paperclips into a right angle using the pliers. I used four paperclips.

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Now, simply attach them to the flash head using strips of duct tape. I put one clip either side and two on the bottom (to stop it wobbling). I left the top free so that the filters can easily be slid in and out.

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I did the same to my other flashgun...

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Finally, remove the filters from the book. The filters need to be trimmed to fit the holder. For my 430ex I simply cut off the end up to the hole that is cut into the filter. (They look better too with no holes in them).

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They should fit your holder perfectly, and they are very easy to add and remove (and you can obviously stack them too if you want to).

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There you go! simple! I just wanted to show my method of doing it as I have seen a lot of people using velcro. Whilst I haven't tried it it looks fiddly, the filters are more difficult to remove and you can't stack them. So I just thought I'd offer up an alternative.

If anyone wants to add anything go for it! I know nothing about colour temperatures... (well I know how to warm up or cool down a flash!) so if anyone knows of specific filters in the swatch book that warm up or cool down a flash to a certain temp then that would be useful.

Have fun!

Stu

Canon EOS 350D, Sigma 10-20 f4-5.6, 24-105 f4L IS, 70-200 f4L, 300 f4L IS, Kenko 1.4x pro300, 430EX, Apple Powerbook G4
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kennmon
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Aug 19, 2006 14:50 |  #2

warmer = more yellowish.
cooler = more bluish.




  
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cdifoto
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Aug 19, 2006 14:55 |  #3

Great idea. Could be shot through a translucent umbrella for a nice effect in a studio.


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Curtis ­ N
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Aug 19, 2006 15:12 |  #4

On the other side of the pond, they're available at B&H for $0.01 plus shipping. Search the B&H site for "Roscolux".

For those interested, my method for attaching these is pictured in this thread.

Stupot, have you tried just pulling out the wide angle diffuser and sticking the gel underneath?


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stupot
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Aug 19, 2006 15:15 as a reply to  @ Curtis N's post |  #5

Stupot, have you tried just pulling out the wide angle diffuser and sticking the gel underneath?

Yeh:) I just thought that since it put the flash on its max zoom it would be losing some light, which might not be great if you're already cutting light using filters. Good thing to do to try it out though, especially if you dont want to stick anything to your flash.


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corinto
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Aug 19, 2006 15:23 as a reply to  @ cdifoto's post |  #6

Just got my sample a couple of hours ago. So I haven't worked it out yet. But I have this preliminary observations.

(All subsequent data from Photonotes: EOS Flash):

Flash is about 5500 ºK.
Tungsten (depending on voltage and age): 2900 - 3200 ºK (older is lower)
Fluorescent: 4900 - 5300 ºK (depending on spec - daylight, etc.)
Candle flame: 1400 - 2000 ºK

Some of the Roscoe samples are marked with the colour shift they produce. Just look them over. And I will also try them.

Let me know if you get more accurate numbers.


Julio.

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Adam ­ T
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Aug 19, 2006 15:28 |  #7

Cheers! How long did it take for the samples to come?


Adam
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Canon 1D MK II - Canon 20D w/ grip
Lens: Canon 70-200mm F4 L USM / Canon 24-85mm USM / Canon 50mm 1.8
Flashes: Canon 550ex / Canon 430ex - Also: Asus EeePC

  
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stupot
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Aug 19, 2006 15:29 |  #8

less than a week.


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Adam ­ T
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Aug 19, 2006 15:30 |  #9

Brilliant, thanks for that!


Adam
http://www.fusion-media.co.uk (external link)
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Lens: Canon 70-200mm F4 L USM / Canon 24-85mm USM / Canon 50mm 1.8
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corinto
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Aug 19, 2006 15:32 as a reply to  @ Adam T's post |  #10

3 days from the US into Chile and my home (they were custom-free due to the low value). Placed the order Wed 10:30 AM and got them Fri 3:30. I used UPS but Express Mail would have worked the same (maybe a couple of days extra).

You have to include something else or the shipping charge will be prohibitive. Actually, the lens cleaning fluid I bought was free on this account.

P.S: I bought at B&H


Julio.

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lakiluno
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Aug 19, 2006 16:20 |  #11

I've sent off for mine - I hope they arrive soon

I'm thinking that I'll do something similar to you (stu), but I'll leave a side clear of hooks and put them along the top, and slide them in. That way I'll be able to mark the number on the bit that will stick out (with the hole) and I'll know more about the filter :)


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stupot
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Aug 19, 2006 16:57 |  #12

leo - sounds good. you've also got a bit sticking out to put your greasy mitts on.. rather than smearing them all over the filter:) so prob a good idea.


Canon EOS 350D, Sigma 10-20 f4-5.6, 24-105 f4L IS, 70-200 f4L, 300 f4L IS, Kenko 1.4x pro300, 430EX, Apple Powerbook G4
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Curtis ­ N
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Aug 19, 2006 17:22 as a reply to  @ corinto's post |  #13

corinto wrote:
Flash is about 5500 ºK.
Tungsten (depending on voltage and age): 2900 - 3200 ºK (older is lower)
Fluorescent: 4900 - 5300 ºK (depending on spec - daylight, etc.)
Candle flame: 1400 - 2000 ºK
Some of the Roscoe samples are marked with the colour shift they produce. Just look them over. And I will also try them. Let me know if you get more accurate numbers.

Data in this thread might interest you.

I also calculated the color temp of the flash with the various Roscolux swatches attached. They all reduced the color temp reasonably close to specification, though the result was higher because the naked flash is higher than 5500K.

Tungsten light fixture in my dining room measured at around 2100K.


"If you're not having fun, your pictures will reflect that." - Joe McNally
Chicago area POTN events (external link)
Flash Photography 101 | The EOS Flash Bible  (external link)| Techniques for Better On-Camera Flash (external link) | How to Use Flash Outdoors| Excel-based DOF Calculator (external link)

  
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Big ­ WIll
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Aug 20, 2006 12:56 |  #14

cheers ordered mine...


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Stavhp
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Aug 20, 2006 13:13 |  #15

for peole in theuk, what did you put for state? it kept asking me for a state


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