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Transmission of a plastic FLD Filter

Filters Infrared
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#1 UlfW

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Posted 11 March 2019 - 18:19

A plastic FLD Filter was mentioned here:
http://www.ultraviol...dpost__p__25877

I got curious and ordered one.
https://www.ebay.com...872.m2749.l2649
Paid less than $10 including shipping for a 77mm filter.

The transmission from 400-1000nm:
Attached Image: Screen Shot 2019-03-11 at 19.05.08.png

Will return eventually with a test image. It s dark outside now.
It will be interesting to see if it behaves smilar to David's filter.
Ulf Wilhelmson
Curious and trying to see the invisible.

#2 Cadmium

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Posted 11 March 2019 - 19:44

Ulf, Thanks! I have a Tiffen branded FLD around here somewhere. I think it is glass though, not sure.
When I find it I will try it out.

Edited by Cadmium, 12 March 2019 - 00:41.


#3 dabateman

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Posted 12 March 2019 - 00:23

Interesting spectrum. I have 3 at 52mm and one at 46mm. All mine are digital brand. The 46mm is significantly lighter than the 52mm ones. I will try to take a picture of mine tomorrow. I cut one of the 52mm to 20mm, to fit in a fisheye lens. So I know for sure they are plastic. Bad things happen when ever I cut glass.

#4 Cadmium

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Posted 12 March 2019 - 02:18

Found my Tiffen FLD.
Took it apart, it is glass.

#5 UlfW

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Posted 12 March 2019 - 04:10

The one I got is made of plastic.
Ulf Wilhelmson
Curious and trying to see the invisible.

#6 Cadmium

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Posted 12 March 2019 - 05:51

Yes, thus the topic name. David's are made of plastic. Mine is made of glass.

Anyone have a shot using one yet?
David: "It pushes all green foliage into white and all other colors stay about normal."
David, do you have an example you can post?

It is night here, all I have are a couple house plants, and they are not looking white with that filter.
Of course, mine is the glass version... perhaps not comparable to the plastic version David has experienced.
I will try outside tomorrow.

#7 UlfW

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Posted 12 March 2019 - 07:58

View PostCadmium, on 12 March 2019 - 05:51, said:

Yes, thus the topic name.
Wasn't really awake when I wrote that. :(
Ulf Wilhelmson
Curious and trying to see the invisible.

#8 UlfW

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Posted 12 March 2019 - 08:26

The only foliage close by is a lawn.
My FLD filter only makes the green foliage more pale and less saturated:
Attached Image: Screen Shot 2019-03-12 at 09.17.30.png Attached Image: Screen Shot 2019-03-12 at 09.17.15.png
BG40 (left) FLD marked GREEN.L (right)
Ulf Wilhelmson
Curious and trying to see the invisible.

#9 dabateman

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Posted 12 March 2019 - 16:46

Here is an image of my FLD filters:

Attached Image: FLD_Filters.jpg

Here is an image with bright reflecting green leafs using the filter:
Attached Image: FLD_PreEM1Fix.jpg

Here is an image of people, not as bright sun light:
Attached Image: FLD_People_Prefix.jpg

I just got my EM1 fixed. The back dial stoped working and now I am having an odd time with WB settings so have not been able to get a good one with the FLD. Not sure why. It seems to be the filter I am having a hard time with. But using a dialed in setting. I am seeing that brightly IR reflective objects go white and not highly reflecting hold closer to their colors. I will have to see if this holds true when my trees get leafs. I don't have much to work with. But the Scuba test looked much better and I will post my images there.

Was finally able to get a shot out of EM1 post fix. Here is an image with Fld filter:
Attached Image: FLD_EM1_Postfix.jpg

I need more bright reflecting green leaves. That seem to be the best subject for the fld filter.

Edited by dabateman, 12 March 2019 - 17:55.


#10 Cadmium

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Posted 12 March 2019 - 21:39

I will go try mine in a while.
Thanks.

#11 Cadmium

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Posted 12 March 2019 - 22:42

Yawn...

Visual using BG38
Attached Image: Back_BG38_1280.jpg

FLD
Attached Image: Back_FLD_1280.jpg

B-410 (had it with me)
Attached Image: Back_B410_1280.jpg

These were done with D7000 UV/IR, and AF Nikkor 35-105mm

I have not tried the Scuba Blue yet, next to do...

#12 Cadmium

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Posted 16 March 2019 - 03:31

Another test using FLD filter:

FLD filter alone:
Attached Image: FLD_back_land_1280.jpg

Visual (using Schott BG38 alone)
Attached Image: Visual_Back_Land_1280.jpg

#13 dabateman

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Posted 16 March 2019 - 05:48

What did you do differently? Your second test is getting closer to what I see. I wonder if the position of the sun matters?

#14 Cadmium

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Posted 16 March 2019 - 05:57

Sunshine.