9 votes

What are these color strips for?

They are gels for coloring the flash. Used for creative effect or to color match the ambient lighting. CTO (color temp orange) is for matching the flash to incandescent lights or sunrise/sunset. CTB ...
Steven Kersting's user avatar
7 votes
Accepted

What can I put inside a 39mm gel holder?

In lighting terms, a gel is a piece of thin, transparent, plasticky material in the color of your choosing. Rosco and LEE are perhaps the best known gel manufacturers, at least in the US. Gels come in ...
Caleb's user avatar
  • 31.7k
7 votes

Will a CTO (or CTB) Gel improve the CRI of a light source

Filters don't add anything, they only attenuate (reduce) part of what is already there more than they reduce other parts of what is already there. If the light source has a low CRI due to missing ...
Michael C's user avatar
  • 175k
6 votes

Will a CTO (or CTB) Gel improve the CRI of a light source

Someone is going to come along with better 'numbers' for this, but imagine the Histogram of a picture of a clown in a flower garden. Then add a slope [filter] to that histogram. You still have a very ...
Tetsujin's user avatar
  • 23.3k
4 votes

What can I put inside a 39mm gel holder?

A gel filter cut to a circle slightly larger than 39mm in diameter is what the holder is designed to hold. There should be a flap that opens up and lets you insert the filter material. You then close ...
Michael C's user avatar
  • 175k
4 votes
Accepted

Picking the right CTO gel to get a sunset look

Is there a way to know which power CTO gel you need to make the shot or is that more of an artistic choice? Yes. There are ways to figure out what CTO you need, but what you need is really just a ...
Caleb's user avatar
  • 31.7k
3 votes

What are these color strips for?

Those are coloured filters to put in front of the flash, simply to change the colour of the light. There is really not much more to it. In the film days, it could however make sense to e.g. use a ...
jarnbjo's user avatar
  • 3,282
3 votes

How do I set up the lighting to take this portrait?

Samantha: Stop watching a bunch of videos about gels and gear and whatever. Get a victim... I mean, a model, and experiment. If you can not get another person to model, learn how to use a timer on ...
Rafael's user avatar
  • 24.8k
2 votes

Why do SLRs and DSLRs use different flash gels?

Sensitivity curves of negative film are different from the permissivity curves of the filters used on digital camera sensors. For example, film was decidedly sensitive to UV light, making the use of ...
user82310's user avatar
  • 251
2 votes

Why do SLRs and DSLRs use different flash gels?

Why do SLRs and DSLRs use different flash gels? They don't. I have heard that the full CTG works well with film SLR, but something about the color sensitivity of DSLR means that they require ½CTG ...
Goat's user avatar
  • 436
2 votes

What is a good general filter to use on a flash to compensate for fluorescent lighting?

I carry a Rogue Flash Color Correction Kit that was given to me at a demo once. It's a bit pricey at $30 for a pouch, sturdy rubber band, and 3 each of: ¼, ½, and full CTO; ½ CTB; plus Green; 1 stop ...
scottbb's user avatar
  • 32.7k
2 votes

What is a good general filter to use on a flash to compensate for fluorescent lighting?

1) We need to make the white of the flash greenish, so it blends to a normal office fluorescent light. 2) We do not know how greenish the light is. Solution) Get a light greenish filter so you can ...
Rafael's user avatar
  • 24.8k
2 votes

What is a good general filter to use on a flash to compensate for fluorescent lighting?

Lee has large filter swatch samples for complete no-brainer pricing. They are actually large enough for misuse as flash filters but they should also be good for selecting what kind of sheets to ...
user82310's user avatar
  • 251
2 votes

Do lens gel holders exist?

You could go the DIY route very inexpensively. In solar photography, a common solar filter is a mylar film, similar in thickness and flexibility to filter gels. Many people create their own solar ...
scottbb's user avatar
  • 32.7k
2 votes

Do lens gel holders exist?

Look at gel filter holders made by Lee. http://www.leefilters.com/index.php/camera-directory/camera-dir-list/category/gelsnap-filter-holder
MirekE's user avatar
  • 5,205
1 vote

Will a CTO (or CTB) Gel improve the CRI of a light source

You might improve it a bit, but you shouldn't bother. CRI is defined by how close the spectrum is to a black body with that temperature. Simple filters like those two in question will never actually ...
Zizy Archer's user avatar
1 vote

Will a CTO (or CTB) Gel improve the CRI of a light source

It depends on why the source has a low CRI... is it due to one measurement being extremely far off, is it due to many measures being notably off, or is it due to all measures being somewhat off? If it ...
Steven Kersting's user avatar
1 vote

What are these color strips for?

In addition to coloring the light of the flash to match ambient lighting, the other fun colors (or colors created by combining gels) can be used to create all sorts of interesting effects. For ...
scottbb's user avatar
  • 32.7k
1 vote

What is a good general filter to use on a flash to compensate for fluorescent lighting?

Let’s break down the sentence from Lee: “Used on tungsten and daylight sources” means you can use the gel on a flash (your flash is color balanced for daylight) or even a tungsten source, such as a ...
the_limey's user avatar
  • 538
1 vote
Accepted

Is color filter detection on speedlights useful when shooting RAW?

The reason to use the filter is when two conditions hold: The ambient light is a much lower color temperature than the flash, i.e. the ambient light is incandescent or 3000K LED. Or fluorescent, if ...
Jim Garrison's user avatar
  • 1,153
1 vote
Accepted

What should I pay attention to when buying speedlight gels?

I have a set of Rogue gels, but don't use them very often. Mostly I use colored plastic sheets which I bought at a hobby store. They are very cheap, you can cut them in every size and shape you want ...
Patrick de Bie's user avatar

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