IRND

[Rollei6008i]

I recently heard about IRND , I also studied Schneider website's explanation.
But it really new to me , anyone have experience on this IRND filter compared with normal ND when using digiback photography ?

 

[tcdeveau]

I just ordered some IRND (3-, 6-, and 10-stop) filters from Formatt-Hitech. It'll be a few weeks before they come in, but I'll try to post some comparison shots with non-IRNDs when I get them.

 

[Shashin]

Yes. They are to compensate for IR contamination. They don't completely solve the problem, but they help a great deal. Personally, I would get ND filters with an IR cut if I am shooting digital. While I can color balance with a regular ND filter, I still have a stronger response in the red channel and so the image is different and it changes with what is in the frame--foliage and stone are in the image, it can make getting good color really hard. For B&W, IR cut might be less important, but there will still be a shift in tones depending of the object, but whether it is better or worse to have IR, I am not sure.

 

[GrahamWelland]

You might find this useful:
http://www.getdpi.com/forum/medium-...ter-removing-ir-contamination-nd-filters.html

I also use LEE filters for daytime and often combine a Big Stopper with the LEE Pro Glass .9 ND which also includes the IR cut.

 

[Rollei6008i]

I just ordered some IRND (3-, 6-, and 10-stop) filters from Formatt-Hitech. It'll be a few weeks before they come in, but I'll try to post some comparison shots with non-IRNDs when I get them.

Thanks a lot indeed, expecting your comparsion.

 

[Rollei6008i]

Yes. They are to compensate for IR contamination. They don't completely solve the problem, but they help a great deal. Personally, I would get ND filters with an IR cut if I am shooting digital. While I can color balance with a regular ND filter, I still have a stronger response in the red channel and so the image is different and it changes with what is in the frame--foliage and stone are in the image, it can make getting good color really hard. For B&W, IR cut might be less important, but there will still be a shift in tones depending of the object, but whether it is better or worse to have IR, I am not sure.

WIth IR contamination , less sharp & visible ?

 

[Rollei6008i]

You might find this useful:
http://www.getdpi.com/forum/medium-...ter-removing-ir-contamination-nd-filters.html

I also use LEE filters for daytime and often combine a Big Stopper with the LEE Pro Glass .9 ND which also includes the IR cut.

IRND really necessary.

 

[Rollei6008i]

Yes. They are to compensate for IR contamination. They don't completely solve the problem, but they help a great deal. Personally, I would get ND filters with an IR cut if I am shooting digital. While I can color balance with a regular ND filter, I still have a stronger response in the red channel and so the image is different and it changes with what is in the frame--foliage and stone are in the image, it can make getting good color really hard. For B&W, IR cut might be less important, but there will still be a shift in tones depending of the object, but whether it is better or worse to have IR, I am not sure.

One more question , Can IR cut(IR UV CUT) filter work as UV protection filter & always mount on lens ?

 

[Bob]

One more question , Can IR cut(IR UV CUT) filter work as UV protection filter & always mount on lens ?

You probably do not need a uv with digital, and frankly you are best served to shoot without filters unless you need them.
The only exception to this is when you are shooting in a very dusty, blowing sand, or salt spray environment.
My guess is with all of the uv or clear filters sold for "protection" ypu might as well be self-insured for the unlikely situation that it actually is useful.
-bob

 

[GrahamWelland]

Also worth noting that UVIR hot mirror filters are seldom completely neutral in color either. I tried various flavors with my full spectrum D800 and they all had some color effect (typically slight cyan) although mostly neutralized by in camera white balance.

 

[Bob]

Also worth noting that UVIR hot mirror filters are seldom completely neutral in color either. I tried various flavors with my full spectrum D800 and they all had some color effect (typically slight cyan) although mostly neutralized by in camera white balance.

Neither are NDs I measured a bunch of them and they were all over the place.
-bob

 

[GrahamWelland]

No disagreement from me on that. All over the map.