InfraRed

[wee_ly]

Hi,

Any idea how we can achieve IR effect in pictures taken using either Dynax7D, or Dynax5D, or Alpha 100?

Thank you
Weely

[Drudkh]

hi Weely,

IR can be achieved by attaching an IR filter on the front of a lens, such as the Hoya R72. But with the 7D and 5D, it seems that either the CCD itself or the low-pass filter which is in front of the CCD, is too reflective. Most likely the CCD. This issue produces glare-like effects on the resulting photo. The cause is still uncertain but I've seen some IR photos taken without much of this effect, which I suspect that the lens used could also be the culprit. No one has done any extensive tests/experiments to conlcude the real cause. You might want to borrow an IR filter from someone else to do a test yourself first before deciding to buy.

[wee_ly]

Thanks Drudkh.

The thing is I have read and understood that in order for a digital camera to be able to capture images in IR, it has to be able to sense infrared (for example: pointing an activated remote control facing the camera and try taking a picture of it). If the outcome from the picture taken shows a red dot on the remote control, that means the camera was able to sense and capture infrared. But, I have tried on a D7D, D5D, and Alpha 100 and they all seemed to fail the test. So, does that mean to say all these cameras are not capable of doing IR photography?

I searched and seems like almost none of our Minolta, KM and Sony dSLR kakis ever posted or spoken in the IR forum before.

[Del_CtrlnoAlt]

Originally Posted by wee_ly Thanks Drudkh. The thing is I have read and understood that in order for a digital camera to be able to capture images in IR, it has to be able to sense infrared (for example: pointing an activated remote control facing the camera and try taking a picture of it). If the outcome from the picture taken shows a red dot on the remote control, that means the camera was able to sense and capture infrared. But, I have tried on a D7D, D5D, and Alpha 100 and they all seemed to fail the test. So, does that mean to say all these cameras are not capable of doing IR photography? I searched and seems like almost none of our Minolta, KM and Sony dSLR kakis ever posted or spoken in the IR forum before.

mind telling how u test on D7D, D5D & A100?

[Drudkh]

I've tried on my D7D, it can capture IR, but takes a much longer exposure like 4secs. You also try different filters which gives you different wavelength of the IR spectrum.

[vortex]

there's a IR outing 2 weeks from now....go for it and get a trial run to see whether your cam works for IR or not lor.

http://forums.clubsnap.org/showthread.php?t=223430

[Drudkh]

Yup, joining outing is the best way to test. There'll be diff filters for you to try, unless all their cams are modified?

Anyway, here's my first try in IR more than a year ago.

[Del_CtrlnoAlt]

how come so noisy 1...

[Drudkh]

because its not quiet lor....

[Del_CtrlnoAlt]

Originally Posted by Drudkh because its not quiet lor....

see the pic so serene... thought should be not so noisy mah... so i guess the place really 鸟语花香。。。

[teerex]

Originally Posted by wee_ly Thanks Drudkh. The thing is I have read and understood that in order for a digital camera to be able to capture images in IR, it has to be able to sense infrared (for example: pointing an activated remote control facing the camera and try taking a picture of it). If the outcome from the picture taken shows a red dot on the remote control, that means the camera was able to sense and capture infrared. But, I have tried on a D7D, D5D, and Alpha 100 and they all seemed to fail the test. So, does that mean to say all these cameras are not capable of doing IR photography? I searched and seems like almost none of our Minolta, KM and Sony dSLR kakis ever posted or spoken in the IR forum before.

Check with jbma, if I'm not wrong he used a 5D in one of our outings before.

[dominator]

Saw this thread and remind of of the IR filter I got.
Hehe...took it out and fit on my kit lens.

Cannot aim since the viewfinder I see nothing and I took one and only photo.
Alamak, damn noisy like Drudkh! But worth trying out again another day when I really free provided weather is good.

Exif
iso 400, awb, f8, 4s, dull cloudy sky.

Awful!! haha

[wee_ly]

Originally Posted by Del_CtrlnoAlt mind telling how u test on D7D, D5D & A100?

Well, I pointed a remote control right before the camera and took a picture of it. When I view the picture taken, there was no red light coming out from the front of the remote control. If I am not mistaken, if there is no red dot, that means not able to sense infrared, is it? I am not too sure but that was what I thought all these while.

[wee_ly]

Originally Posted by vortex there's a IR outing 2 weeks from now....go for it and get a trial run to see whether your cam works for IR or not lor. http://forums.clubsnap.org/showthread.php?t=223430

Thanks for the invitation but I have scheduled to go shooting it my buddies to HSBC's Wakeboarding. I will look for you guys' next IR outing and hopefully get to see some light to the answer my own question.

[d4nie]

Hi..

I have posted IR photo taken using KM5D in one of the thread in KM forum.
You can search it if you want.

The following photo are taken with the Alpha.

- Using Cokin P007 Filter



- Using Hoya R72 Filter



Exif data still intact.

As you can see there is a big hot spot at the centre of the photo taken using the Cokin filter and a not so visible hot spot on the photo taken using Hoya R72.

Both KM5D and Sony alpha are able to take IR photo, but you must be careful with the hotspot and better to use Hoya R72.

For me, I prefer to take IR photo using my Sony V3, using night shot mode + Hoya R72

[satay16]

d4nie, noticed your pics are much less noiser than some IRs. wondering how you did it.

[Del_CtrlnoAlt]

Originally Posted by wee_ly Well, I pointed a remote control right before the camera and took a picture of it. When I view the picture taken, there was no red light coming out from the front of the remote control. If I am not mistaken, if there is no red dot, that means not able to sense infrared, is it? I am not too sure but that was what I thought all these while.

u got use long exposure? cos remote control u press will be flickering... if u use fast shutter, will not capture the red light.

[tankm]

As d4nie has posted, A-100 can do IR photography, infact much better than the KM5D IMHO.

My experiment on IR photography on the A-100.
ISO200 / f5 / 1.3 seconds exposure with Minolta 24-85 lens.

[d4nie]

My alpha is special one

Seriously, just shot using low ISO (100 - 200),
Those photos are taken without noise reduction in camera and also no noise reduction during post processing.

Originally Posted by satay16 d4nie, noticed your pics are much less noiser than some IRs. wondering how you did it.

[d4nie]

Just discussed with a friend.
The hotspot in the first photo might not be due to filter problem, but due to lens problem.
I was using two different lenses for those photos.
Tamron 11-18mm + cokin P007
KM 28-75 + Hoya R72.
Will try the cokin on the KM 28-75, next time....

Originally Posted by d4nie As you can see there is a big hot spot at the centre of the photo taken using the Cokin filter and a not so visible hot spot on the photo taken using Hoya R72. Both KM5D and Sony alpha are able to take IR photo, but you must be careful with the hotspot and better to use Hoya R72.