Complaints about reflections with IR-cut filters?

[wparsonsgisnet]

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I just posted this in another thread -- to show that I thot the image was ok when getting direct light sources in the frame when using a 486 filter.

 

This is a shot from my first weekend of shooting with the M8, iso 2500, 24mm @ 2.8, 486 filter in place, 1/250, with Neat Image noise reduction.

 

It was cropped to show the lights at the right, one of which is mostly oncoming. I think this demonstrates that the IR-cut filter does not ruin the image.

 

Any comments from the monsters?

 

tnx,

[Guest guy_mancuso]

Bill back in Jan. i posted a bunch of stage shots from a Modeling and Talent convention that were directly into the lights and everything seemed very well behaved and have not seen anything since. FYI I always have my filters on too so any shot posted here is with IR filters.

[wparsonsgisnet]

Guy, I recall those shots, about which I was quite jealous.

 

At the time, I didn't have the perspective that I got reading the thread about the 'Nocti stage shots.

[Guest guy_mancuso]

I found some , here you go

[lct]

No ghost images obviously, how about flare?

[Guest guy_mancuso]

I have seen so little of flare that it is amazing . I did the other day though with a backlight strobe with the guy standing by a plane , more my fault than anything else. I cleaned it up pretty good

[wparsonsgisnet]

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I think Guy's 2nd, 4th, and 5th images show it very well. There is a light at the top of the frame facing the camera. There is some haze around the light (if it were the moon, we'd be forcasting rain for tomorrow), but no apparent, associated problems with the image as a result.

 

I like these images even better than the ones he posted before.

 

I want this Guy to photo my wedding -- oops, that already happened.

[Guest guy_mancuso]

I actually have to do a wedding this weekend. My wife and her big mouth, got me to do a friends kids wedding. Not a big wedding fan shooter. But I'm going all M8 on it. i tried everything else , why not round out the experience. LOL

[MarkM6]

With a filter infront of a lens, any lens, there is a risk that flaring and ghosting will show up. As simple as that. So, if the pictures come out okay, good; if not, oh well...

[lct]

With a filter infront of a lens, any lens, there is a risk that flaring and ghosting will show up...

Have you some experience of flare with IR-cut filters?

I haven't personally, hence my question.

I'd like to see samples to check if those filters behave the same way as UV and color filters i've used for 30 years.

Any other examples folks?

[Guest guy_mancuso]

LCT the one above is flared with a IR filter on . More my fault than anything else but yes I have seen flare on ocassion but pretty rare. I live in a very sunny part of the country so it is always a threat

[lct]

Thank you Guy, would you say that those IR filters are less flare prone than UV's?

[Guest guy_mancuso]

Hard to say since I did not use UV filters very often except when i had a job that the lens needed some protection. But in theory I would say the IR would be better because it does act like a aperture grill that there is a 40mm viewing window and beyond that there is cut off like we see that cyan cast from 35mm down. I may have said this the wrong way but hopefully you get my point. Now i posted the runway shots above because when shooting it I had really nowhere else to be but below the 4 ft high stage and i am looking directly into the lights. This is a convention floor and not a real stage where one would be above the subject so when shooting this event which I do twice a year , I run into this with lights and starting out was pretty worried about it. Luckily given this was only the team event stuff where i was close and the rest I was able to be back and above with the 180mm. But it did a great job which surprised me. What was good is it did not degrade the image

 

For me living in the Southwest of the US the sun is really a issue, very bright and intense. So i have had some flare on occasion but i would not say more than without a filter on there.

There is always going to be some risk though because we all know filters can make a issue even worse but the IR filter seems pretty well behaved. Honestly I am not a big fan of filters , actually i hate them but overall they don't seem to bad at all. My images are extremely sharp with them on, so my distaste against them has faded somewhat.

[wparsonsgisnet]

I kept UV's on my 50 and 35 for years and didn't notice problems. That included stage shots like the first one.

 

Since the IR-cut filters have a UV-cut filter on the other side, this is a good thing.

[fotografr]

Lovely shot, Bill.

[lct]

I kept UV's on my 50 and 35 for years and didn't notice problems...

Forgot to remove a multicoated UV from the great Nikkor 180/2.8 here.

 

[MarkM6]

I don't think LCT get what I am saying; it is a risk that you could have ghost or flare in the picture with a filter doesn't matter what type of filter is used.

[wparsonsgisnet]

From the pix, I think we are saying we are finding the opposite.

 

These pix show no ghosting or flare -- from light sources -- even at high iso.

 

This may be due to the two-sided coating (IR on one, UV on the other), or to the fact that directly oncoming light is not a problem.

 

Perhaps there is a different type of oncomg light that will make a difference, such as diffuse and bright.

[sean_reid]

Part of the filter comparison test I'm working on will involve flare comparisons between the three major players (the color rendering comparison is already published).

 

That said, any high quality multi-coated filter will resist flare and reflections up to a point but any filter can show those problems under the "right" conditions. Having used the 486 filters on M8s for several months now, I'd say they're no more or less prone to flare than any other high quality MC filter. It's very rare that I see flare or reflections with them but it is possible to have those problems with any filter, no matter how well it is coated. Last month I interviewed an optical designer (of high-end filters) who essentially conceded the same conclusion.

 

Cheers,

 

Sean