Flare in IR filter

[Hoky]

Kinda embarassing to display my first IR shot here.
Just testing the Cokin today and I realized that there's a lot of flaring.
How do I overcome this problem? Also comment on any improvements on workflow or settings.
(Forget about the composition, just trying this out downstairs my place)
Can't put my lens hood on with the Cokin..



Setup:
350D + EFS 10~22mm + Cokin Wide angle adaptor + Cokin P007 IR

Shot information:
Tv(Shutter Speed)
5Sec.
Av(Aperture Value)
F11
Metering Modes
Evaluative metering
ISO Speed
800
Lens
10-22mm
Focal Length
22.0 mm

[TrailsofLife]

Ask Ark19 to modify your filter to screw-mount kind, like any other filter.

[teerex]

Nothing to be embarrased about, everybody has to start somewhere.

I should say that that's a very good first attempt. Exposure is fine, sharpness is there.

There is no way you can put your lens hood over the square cokin filter. As Max suggested, get it modified to a screw on round filter, very good and easy to use after modification.

As for workflow, it a matter of personal preference. What you have is alright as long as long as you like it. But then with some editing the pic can be further adjusted.

Here's my attempt with some adjustments on your pic.

What I did.
- masked the sky in the original to work on the rest of the picture
- reduced the reds in the trees to get the resultant white foliage
- reduced slightly the blue and magenta in the HDB blocks and the foot path
- added a blue sky with some clouds.
- merged the layers
- slight "S" curve to enhance the contrast
- slight sharpening for the final result

[Hoky]

Originally Posted by teerex Nothing to be embarrased about, everybody has to start somewhere. I should say that that's a very good first attempt. Exposure is fine, sharpness is there. There is no way you can put your lens hood over the square cokin filter. As Max suggested, get it modified to a screw on round filter, very good and easy to use after modification. As for workflow, it a matter of personal preference. What you have is alright as long as long as you like it. But then with some editing the pic can be further adjusted. Here's my attempt with some adjustments on your pic. What I did. - masked the sky in the original to work on the rest of the picture - reduced the reds in the trees to get the resultant white foliage - reduced slightly the blue and magenta in the HDB blocks and the foot path - added a blue sky with some clouds. - merged the layers - slight "S" curve to enhance the contrast - slight sharpening for the final result

Thanks Max and Teerex for the advice.
I was just wondering what is the problem here.
Is it the gap between the Cokin adaptor / ring that is allowing light to seep in?
Or is it low flaring resistance of filter? I'm just ordered a Cokin GND+4 and I'm now beginning to wonder if the same flaring would occur as well.

[teerex]

Originally Posted by Hoky Thanks Max and Teerex for the advice. I was just wondering what is the problem here. Is it the gap between the Cokin adaptor / ring that is allowing light to seep in? Or is it low flaring resistance of filter? I'm just ordered a Cokin GND+4 and I'm now beginning to wonder if the same flaring would occur as well.

Depending on the angle of the sun. The flare is caused by light leak between the filter and the lens when the Cokin P Adapter is used. This is a known problem. That is why most of us using the Cokin P007 have it cut and converted to a round screw on filter.

[ark19]

Hi Hoky,
if u want to use the square cokin filter, don't use the adapter.
Instead, hold the filter directly over the lens.
Also try to have the sun behind u...

[Hoky]

Originally Posted by teerex Depending on the angle of the sun. The flare is caused by light leak between the filter and the lens when the Cokin P Adapter is used. This is a known problem. That is why most of us using the Cokin P007 have it cut and converted to a round screw on filter.

Thanks again, Terrex. And to Ark19 too.
Does it mean that all creative filters fitted with the Cokin filter holder have a tendency to flare?

I have a bad feeling with the GND I ordered now.

[TrailsofLife]

I think GND is fine. I'm using a Tian Ya one. But IR shoot is more light sensitive.

[Reno]

Yo.....!! i am facing the same problem as you..... it is the gap between the Cokin adaptor / ring that is allowing light to seep in... try cover the gap up with a black thick cloth will do the trick...

[Hoky]

Originally Posted by Reno Yo.....!! i am facing the same problem as you..... it is the gap between the Cokin adaptor / ring that is allowing light to seep in... try cover the gap up with a black thick cloth will do the trick...

Thanks for the advice...
I juz made myself a "cover" for the filter holder. Yet to try it out.
If it works, I'll post the pic here.

[etegration]

Originally Posted by Max 2.8 Ask Ark19 to modify your filter to screw-mount kind, like any other filter.

how that works huh?

i a bit about cokin system. hope someone can advise.

Fro example, i'll be using a 350D mounted with a 10-20mm Sigma. Thread is 77mm on the 10-20mm.

I'll need the Cokin holder (system P or X? http://www.geocities.com/cokinfilter.../12b1dafe0.gif) + 77mm adaptor (http://www.adorama.com/ck77p.html) + the respective filter like if i want IR, i'll get what Hoky's using, the Cokin P007 IR? (http://www.pixmania.co.uk/uk/uk/1128...eative-fi.html)

What will the "Cokin Wide angle adaptor" be for? (http://www.pixmania.co.uk/uk/uk/3251...or-ckr730.html)

[Hoky]

Originally Posted by etegration how that works huh? i a bit about cokin system. hope someone can advise. Fro example, i'll be using a 350D mounted with a 10-20mm Sigma. Thread is 77mm on the 10-20mm. I'll need the Cokin holder (system P or X? http://www.geocities.com/cokinfilter.../12b1dafe0.gif) + 77mm adaptor (http://www.adorama.com/ck77p.html) + the respective filter like if i want IR, i'll get what Hoky's using, the Cokin P007 IR? (http://www.pixmania.co.uk/uk/uk/1128...eative-fi.html) What will the "Cokin Wide angle adaptor" be for? (http://www.pixmania.co.uk/uk/uk/3251...or-ckr730.html)

From what I know, you have to cut out a circle from the P007 square plastic and mount it on a 77mm ring (take out the glass from a cheapo Hoya filter and replace it with the IR.)

The X system is not easily available in Singapore. You may have to try videography stores to get it. I got myself a P wide filter holder instead.

The Wide angle filter holds one 1 filter whereas you can stack up to 3 with the normal P holder. But there's a higher risk of vignetting with it.

[etegration]

Originally Posted by Hoky From what I know, you have to cut out a circle from the P007 square plastic and mount it on a 77mm ring (take out the glass from a cheapo Hoya filter and replace it with the IR.) The X system is not easily available in Singapore. You may have to try videography stores to get it. I got myself a P wide filter holder instead. The Wide angle filter holds one 1 filter whereas you can stack up to 3 with the normal P holder. But there's a higher risk of vignetting with it.

thanks for explaining but since you using a canon 10-22mm, why still need a "Wide angle adaptor" or is it like you posted, it's just a filter and not a adaptor??? It's like this big > http://www.pixmania.co.uk/uk/uk/3251...or-ckr730.html

[Hoky]

Originally Posted by etegration thanks for explaining but since you using a canon 10-22mm, why still need a "Wide angle adaptor" or is it like you posted, it's just a filter and not a adaptor??? It's like this big > http://www.pixmania.co.uk/uk/uk/3251...or-ckr730.html

No... I'm talking about the Wide angle filter holder... not adaptor...
The Wide angle creative filter system consists of 1x filter holder, 1x adaptor ring, 1x creative filter of your choice...
The biggest difference between the wide angle and the standard holder is that the wide angle can hold only 1 filter whereas you can stack up to 3 on the standard.
See this URL: http://www.cokin.com/ico15/ico15-haut.html?=#p

Anyway, today I tried taking more Infrared shots with my paper cut shade around the filter holder... It's still showing signs of flaring... Looks like I have to make a "hood" for it.

[etegration]

Originally Posted by Hoky No... I'm talking about the Wide angle filter holder... not adaptor... The Wide angle creative filter system consists of 1x filter holder, 1x adaptor ring, 1x creative filter of your choice... The biggest difference between the wide angle and the standard holder is that the wide angle can hold only 1 filter whereas you can stack up to 3 on the standard. See this URL: http://www.cokin.com/ico15/ico15-haut.html?=#p Anyway, today I tried taking more Infrared shots with my paper cut shade around the filter holder... It's still showing signs of flaring... Looks like I have to make a "hood" for it.

thanks man! you're making me thinking of getting this. the 77mm R72 filter is like $250.00 new. haha too ex for me as a hobbist. hee hee