Originally posted by Imageman I really don't think this is a good idea. You are contemplating cannibalising an excellent camera just for IR, this conversion will be irreversible and costly.
How much does this cost, I suspect its over 200 dollars.
An alternative is to spend that 200 dollars on a different camera, im thinking out of the box here.
I recommend you buy a Sigma SD10, they cost around 200 dollars on ebay.
On the SD10, the IR filter is part of the user removable dust filter exposed when changing lenses. It takes 2 minutes to remove at zero cost, and 2 minutes to replace at zero cost. The camera can be used for IR photography one minute and normal photography the next, then converted back for IR again.
You get a second camera at less cost than the conversion of a k5 to IR and you can sell it later fully functioning for what you paid for it if you get tired of it.
This is as close to a zero cost flexible and reversible solution you are ever going to find.
Of course you would need to buy an IR filter to fit over the lens, and exposure calculation wont be easy but think of the money you could save.
I believe it makes sense, converting the SD10 to IR and back again is as easy as changing lenses on a DSLR and the manufacturer allowed this conversion without affecting the warranty, that's how easy it is.
N.B. dont buy the SD9 the IR filter isn't removable like it is in the SD10, only the SD10 and the more expensive SD14 have this option of easily removing and replacing the IR filter.
Imageman,
Thanks for the response. The actual cost of converting a K-5 is $450. I am no longer using my K-5, having replaced it with a K-5II, so I am not concerned with irreversibly altering the camera.
Your suggestion regarding the Sigma SD10 is interesting, but using an external IR filter on a standard DSLR is a completely different experience than using a camera with an internal IR filter. This is because external filter does not transmit visible light, which results in the camera's viewfinder being blacked out. In contrast, an internal IR filter does not affect the VF image, because the filter is not in the path of the light passing from the lens to the eye. So, although external IR filters can be used, but they are very cumbersome, and determining proper exposure with them is a real challenge.
Rob