Ir filter & canon 20d

[Stinkeypete]

I have just been looking in to IR filters and it is apparent that it is not as straight forward as I might have first thought.

Two things really:

1. Will my Canon 20D give decent results with an IR filter.
2. Should I get a screw on filter or one to fit my Lee filter system. Presumably getting the Lee IR filter for their holder there should be no issues with light seepage around the filter/holder.

Hope someone with some knowledge/experience can help.
Thanks
Paul

[miketoll]

I have no personal experience, thought this might help:
http://photography-on-the.net/forum/...44#post1061244

[Stinkeypete]

Many thanks Mike - very useful link. It seems that with a suitable knowledge of PS using a Hoya R72 gives some good results.
I would still be interested to know if anyone has any experience of a Lee IR filter with a 20D as the Hoya screw ones a more expensive especially the 77mm!
Thanks again
Paul

[Susan Green]

Tripod I used, f low, I think only 2.8, 15 sec, ISO 100, but is was windy so foliage is blured. Procesing is the trouble as I did not manage what I liked, all grain and awfull.

Susan

[Don Hoey]

Originally Posted by Stinkeypete

.......I would still be interested to know if anyone has any experience of a Lee IR filter with a 20D as the Hoya screw ones a more expensive especially the 77mm!
Thanks again
Paul

No experience of the 20D but I cannot see a problem with using the Lee IR filter.

There are two old threads on IR, check these links.
http://www.worldphotographyforum.com...hread.php?t=63
http://www.worldphotographyforum.com...ead.php?t=4494

The big thing to bear in mind with the Lee filter is to ensure that there is no light leak around the sides. I had great results with processed unexposed e6 transparency film. I then tried Cokin filters in my pro shade but had to tape up all light gaps so it was a bit of a fiddle. Remember also that you do need to blank out the eyepiece on these long exposures.

I see Susan is also into this so need to re-read my posts to get my head in gear. Unfortunately my old pc died a death and along with it went all my notes. Pictures backed up but not notes.

Don

[Stinkeypete]

Thanks Don and Susan for the advice and links etc. I have plumped for a £15 screw on filter rather than the Lee so I dont have to bother with taping the edges. For the cost I figured id give it a whirl and fingers crossed it will be as good as a Hoya!

Good luck Susan with your continued experimentation. I'm sure you will get there and I look forward to seeing your results.

[petrochemist]

Paul
I definitely recomend the screw in models over the Lee/Cokin style. IR filters block so much light that the stray light round the back of the filter will cause problems.

I've managed to get some very cheap IR filters from China (via e-bay) which seem to work perfectly. A range of sizes & transmittion wavelengths are available, if you're not sure if your camera is suitable I think one of these is the best approach to give it a try, though postage might take a few weeks.

I'll be travelling close past you next week on my way to/from a course (Wednesday morning/Thursday early evening), and could let you have a play with my filters if that would help. (I've got two 52mm filters & a 49mm one, but should be able to find some stepping rings too if required).

[Stinkeypete]

Hi Mike,

Many thanks for the very kind offer it is much appreciated. However, all being well, I should receive my screw fit IR filter in the post today. I picked it up for £15 from a UK ebayer but guess it is originally an import from China/Hong Kong.

Heading up to the lakes this weekend so shall take it with me and hope for weather like today but with a few fluffy clouds.

Cheers again.