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Filters for IR

Phil Wood View Drop Down
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Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Topic: Filters for IR
    Posted: 19 April 2024 at 21:22
The postman brought me an IR converted Nex-5 today and, as a complete novice to IR I am hoping for some advice.

I would like to use the camera with my 16-50 PZ - which means I need to get a filter or two. I shall order a 720nm as the basic choice, they seem readily available.

I would also like a filter to remove the IR and allow the camera to work in the normal visible spectrum. I assume this is an IR/UV cut filter - but I can't find one that fits my lens (40.5mm) - am I looking for the right filter and has anyone found one in this size?


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neilt3 View Drop Down
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 21 April 2024 at 19:56
When you say you've just got an " IR converted Nex-5 " is it IR converted or full spectrum ?
If it's IR converted , there's no need for an IR filter. Also , if it's IR converted then it blocks out visible light .
So if you put a UV/IR cut filter on it , then no light at all will pass !

The 16-50mm lens hot spots quite bad at the wide end . The 18-55mm is much better from 20mm up , there is no hotspot .

Although I've a 40.5mm IR filter , I just used a step up ring to use easily available 49mm filters .
The 18-55mm if you use that one is already 49mm .

On my NEX 3C I converted , I permanently had the Sony 20mm pancake lens on it and a 49mm filters .

When I converted an NEX 6 to full spectrum ( really wanted the viewfinder ) I picked up one of these drop in filters that work well .
ebay link

So all the lenses I put on are covered .
I'm thinking of getting the Aerochrome drop on filter off him as well .

If it's a full spectrum camera you've got and you want to use it as a regular camera , you need to pick up a B&W 486 , UV IR cut filter .
Only visible light passes that .
I have one in 49mm for that reason .
see my photostream on flickr;
C & C welcome.
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