ND Filters and IR Filters

[Michael Frymus]

I haven't used IR filters before. Haven't used and filters above 1.2 before.
Do I need to have an ir filter every time I use filters above 1.2? And should I be using IRND filters or two separate filters?

 

[Shapour Daneshmand]

I like to know the answer to this question too.

 

[Patrick Tresch]

A lot of threads cover it.

But I could say:

Use the less Number of filtres possible. Avoid stacking.

Go with Formatt IRND when shooting a RED camera.

The Olfp of the Dragon will change so filtration should be adapted...
We will see.

Pat

 

[Dave Blackham]

Patrick is right, go with this suggestion you wont go wrong.

 

[Michael Frymus]

I'm planning on buying the BMC 4K. and using it for that.
Currently at the moment, until I wait, its for DSLRs.

Should I get all the filters about 1.2 with IRND then?

 

[Michael Frymus]

Is it best to get the:

Tiffen Full Spectrum IRND
--Or--
Tiffen ND filter + Schneider 680 IR Filter


If I have a separate filter, it will be cheaper.
But, I will loose a filter tray in the mattebox, using up all 2 of the trays.
And Im not sure if I'll loose more light by having a second filter or not.

Which is recommended?

 

[Michael Frymus]

Anyone know the question above?

All in one filters or stacked combination with 680 IR Filter?

 

[Kirk.Attard]

Hi guys. I thought about buying this setup - correct me if I'm wrong please. I found written on the Formatt site that for 800 asa you would need around nine stop of nd to shoot at f 2.8. So I buy a combo of Hotmirror IRND 1.8 (6 stops of nd) to cut most IR (when shooting daylight) and then buy normal nds to add the remaning attenuation if I need. I've read here that below three stops you can do without IR filtration. Hopefully I wouldnt use more than three filters in total. Ideally two. Does the circular polariser stop light as well?

 

[Patrick Tresch]

Best all in one... when possible but it's more expensive.

Pat