Canon 5D Infrared

Hi, has anyone tried using infrared lenses with a 5D? I understand that the 5D

has a fairly powerful internal IR filter, can you still take IR pics? The

forums widom and experience would be appreciated.

You can, but like all unmodified EOS DSLRs exposure times will be long, at least several seconds. Typical exposures might be 20s @f8 and ISO 100 with a Hoya R72 filter.

No, most newer DSLR's will not work well for IR....period!

 

Using a screw-in Wratten 87 front filter my 30D would not register any IR light. Your best bet is to buy older technology like a 10D or 20D for this purpose, unless you want to get it modified for both IR and normal photography by LifePixel.

 

 

My experience with IR was with a Nikon D70 and was fantastic using that filter. Exposures were a mere 0.5 sec..see attached<div></div>

Well, if you don't mind using a tripod, the 5d works <a href = "http://www.photo.net/photodb/folder?folder_id=809589">very well</a> IMHO. Those were shot with a cheapo Chinese ebay 850nm pass opaque filter mounted on two different M42 SMC Takumars, 28mm and 50mm. Exposure was f8 to f16, 400 ISO, 15 to 60 seconds exposure. Converted to gray scale and levels tweaked in PS.<p> <img src = http://d6d2h4gfvy8t8.cloudfront.net/6958490-lg.jpg>

Why such a deep cut filter (850nm pass)? Most people seen to use the R72 (720nm pass). I know it would give a more intense IR effect if the sensor responded to it, but I'm surprised it doesn't lengthen exposure more.

 

Do you know for sure that the filter only passes IR above 850nm? Did you ever compare the results with an R72?

 

The Hoya R85 is an 850nm long pass filter and as far as I know most EOS bodies won't record anything through it, though I'll admit I haven't tried it myself. The usual theory is that you only get a response at shorter wavlength IR where the strongly cutting built in IR blocking filter still allows a little IR to leak through.

I tried a Cokin IR filter (89B) on my 5D with a 24-70mm 2.8 and was able to produce

these Grayscales:

 

<a href=" title="Stovepipe Well

Dunes by lucafotogne, on Flickr"><img

src="http://farm3.static.flickr.com/2216/2360802380_02ac26834a_m.jpg" width="240"

height="160" alt="Stovepipe Well Dunes" /></a>

 

 

<a href=" title="Stovepipe Well

Dunes by lucafotogne, on Flickr"><img

src="http://farm3.static.flickr.com/2409/2360803520_7d4a826874_m.jpg" width="240"

height="160" alt="Stovepipe Well Dunes" /></a>