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Permalink Reply by Zyg on January 22, 2008 at 2:55am

Get any TV, DVD or CD remote control and aim it at your camera lens, press the button and take some pictures. If you see a light at the end of the remote, in the pictures, then you know your camera is IR sensitive. Depending on your cameras sensitivity, you could be into some long exposure times, from 1-8 seconds. Make sure you own a tripod!

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Permalink Reply by matias on January 22, 2008 at 5:35am

ok zygmund, thanx; i don't know why i did not think of it. the g9 is pretty good but the cheapest ixus850 is excellent however it is not suited for lenses. i did go to this site you pointed out, but i am still unsure of this: when you have a IR filter for a given wavelength, does it mean it let that wavelength in only and all the rest is blocked out??

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Permalink Reply by Zyg on January 22, 2008 at 3:02pm

Basically the the lower the number (i.e. 87) the less normal light is allowed and thus the filter is more sensitive to IR. An 87 allows only IR to pass trough and an 89 is considered near IR, because it lets in normal light also. In non converted cameras this translates to longer exposures if you use an 87 then if you use an 89. All of the IR photos in my photostream were taken with an 87. My average exposure times are between 4-6 seconds.

For your cameras you might look into the Cokin series A filters. Cokin makes a shoe holder and a magnetic holder that uses the series A filters and might work with your cameras. They make an 89B IR filter.

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Permalink Reply by matias on January 25, 2008 at 5:34am

Thank you Zygmund. they do have an 89 and about any filter shoe or adapter that could be needed. will check seriously into it.

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Permalink Reply by Zyg on December 29, 2007 at 3:10pm

Paul,

Johno has done a good job showing the basics of infrared with your camera. Technically your Hoya R72 is a 89B on the Wratten scale, which makes it a near infrared filter. To understand what I’m talking about, follow the this link:
http://www.cocam.co.uk/CoCamWS/Infrared/INFRARED.HTM#FIL

This might also be contributing to the center hotspot. I have had this problem with my Olympus E-1 from time to time. This is why I went to truer infrared filters. I own a 88A and a 87(on the Wratten scale) also. When I use these filters the hot spot never occurs. I get my filters from the following company:

Harrison and Harrison
1835 Thunderbolt Drive, Unit E
Porterville, CA 93257
559-782-0121

They do not have a website, but they do have an email: HarrisonOP@aol.com

It was about 7 years ago that I bought my 88A and 87 filters, they were $40 each at that time. Their support is excellent. 4 years ago a flaw developed in my 88A and they replaced both the 88A and the 87 at no cost. At that time I bought the 89B and that filter cost me $40 also. I do not know what their current pricing is.

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Permalink Reply by paul holmes on December 29, 2007 at 9:45pm

hi zygmund thank you for your help i will check this out.

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Permalink Reply by Noviar Rustam on January 24, 2008 at 5:28pm

Hi Paul...all the shots come out red are because of your camera was not set to "pre set" white balance. before You use your Infra red Filter, you have to set your camera white balance to pre set. one of my picture is using Hoya R72. First, set your White balance to Preset, then use White paper or anymedia that fulfill with White, after that focus and fill your camera frame with white by zooming to the white paper (don't forget to use tripod to make your distance with the white paper still same and focus), after that switch your autofocus to manual and use your infra red to your camera, after that, make a shoot to the white paper, if your camera tells that shoot is good, meaning you have successfully set your white balance to use with your Infra Red and you can switch back your camera focus to auto focus. Now you can shoot with your Infra Red but don't forget to use Pre Set White Balance ...and when using Infra Red you have to add more stops to your exposure value...because Infra Red reduce lighting...

After you have succeded with the pre set now use your tripod to capture object that you want to capture with infra Red. First, make composition and focus you like and record the EV after that switch your camera focus to manual then use your IR, after that add more Value to your Exposeure or make bracketing, then...Just Shoot...

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Permalink Reply by paul holmes on January 25, 2008 at 2:08am

noviar thank you for all the imformation,i will check this out when i get my camera fixed.

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