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Walk in Moscow with ZWB3

19 replies to this topic

#1 Dmitry

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Posted 13 July 2018 - 19:19

I decided to post these photos finally. They are 98% IR and only 1% UV.
My first attempt to make photos with new lens, I not familiar with focus shift issues on it.

Camera: Olympus E-PM1 fullspectrum
Lens: Meike 28mm/f2.8
Filter: ZWB3 2mm thickness

Attached Image: P7089104.jpg

Attached Image: P7089110.jpg

Attached Image: P7089113.JPG

Attached Image: P7089115.jpg

#2 Andy Perrin

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Posted 13 July 2018 - 19:28

Ooh, these are very nice. I like the skies this filter makes. You have some great subjects in here also. The last photo is my favorite.

#3 Dmitry

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Posted 13 July 2018 - 19:32

https://goo.gl/maps/PYrSDpiBE1R2
https://goo.gl/maps/pghF2Ei98zy and rotate view there :)
https://goo.gl/maps/9eLSRV7JPNE2

#4 bobfriedman

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Posted 13 July 2018 - 23:00

most interesting!.. taking the stroll around using your links..

great clouds in your images. especially #2

#5 Andy Broomé

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Posted 14 July 2018 - 00:30

Very nice, Dmitry! I like the 2nd and especially the 3rd shot the most.

#6 dabateman

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Posted 14 July 2018 - 11:28

I really like the 3rd shot. Your timing with the light and the scene is very well done.

#7 UlfW

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Posted 14 July 2018 - 13:06

View Postdabateman, on 14 July 2018 - 11:28, said:

I really like the 3rd shot. Your timing with the light and the scene is very well done.
The two second and third are my favourites.
I also like how this filter render the sky colour compared to what an UG11 would have given.

Dimitry, how thick is your SWB3?

Edited by UlfW, 14 July 2018 - 13:07.

Ulf Wilhelmson
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#8 Dmitry

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Posted 14 July 2018 - 14:54

ZWB3 was 2mm, check 1st post :)

#9 Dmitry

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Posted 14 July 2018 - 14:59

For comparison ZWB3+QB21 (both 2mm)

Not so good, its blurry due focus shift, but you may look at sky colors.
Attached Image: P7089112.JPG

#10 Cadmium

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Posted 14 July 2018 - 17:46

Dmitry, These are wonderful photos.
One thing that is fun about the UG5/U-330/ZWB3 is that they can be shot hand held, either as single filter dual band IR shots (as you have at the top), or even as a UV+Blue+Green stack (like your last pic).
You don't really need to use a special UV lens, for landscapes I just use my 18-55mm VR kit lens (when using my DX camera).
I have not noticed any focal shift with such shots myself.

WARNING: Be prepared to encounter green skinned Orion women (as with this UG5 + S8612 shot). ;)
Attached Image: Orion_Woman_Beach_Bridge_UG5_Stack.jpg

PS: Note the difference in color between the grass and the trees.

Edited by Cadmium, 15 July 2018 - 01:45.


#11 David475

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Posted 16 August 2019 - 17:52

You make some important editing? I have zwb2 and need a big boost to grow green color

#12 Cadmium

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Posted 16 August 2019 - 21:28

No color editing or boosting.
RAW (NEF) white balanced in CNX2, full frame marquee, then TIFF to Photoshop, auto levels. Color doesn't change after white balance, only contrast with auto levels a little.
This is the typical UG5 (U-330) 1.5mm (or 2mm) + S8612 2mm, liked used for UV+Blue+Green, AKA "Bee Vision" stack.
UG5 alone would look more like your shots at the top of the topic.

Orion Woman 2
Attached Image: UG5_850H.jpg

With Headphones and Sunglasses
Attached Image: Green_Skin_Headphones_1280.jpg

Edited by Cadmium, 16 August 2019 - 21:56.


#13 Cadmium

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Posted 17 August 2019 - 04:00

Something else I thought of, the lens I am using is not exactly a UV friendly lens, so it is questionable just how much UV is being mixed with the blue/green of these shots I did.
Nikon D7000 UV/IR + Nikon 18-55mm VR.
Fun though.

Edited by Cadmium, 17 August 2019 - 04:01.


#14 dabateman

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Posted 17 August 2019 - 05:23

View PostDavid475, on 16 August 2019 - 17:52, said:

You make some important editing? I have zwb2 and need a big boost to grow green color

Zwb2 is equivalent to UG1 which is near equal to U360 filter. These are UV filters with slight bump into 400 to 405nm.

The Zwb3 equivalent to Ug5, which is near equal to U330 filter is very different.
Expect Cadmium to post a filter gragh in less than 10 seconds.
These images here (zwb3 like Ug5=U330) will look much different than your Zwb2 images (Zwb2 like Ug1=U360).

#15 Andy Perrin

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Posted 17 August 2019 - 12:07

None of the ZWB graphs are reliable.

#16 Cadmium

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Posted 17 August 2019 - 16:05

First of all, I apologize for getting David475 mixed up with Dmitry, I thought I was replying to Dmitry above... I didn't realize this until just now. Regardless, doesn't matter, just needed to mention that was my place from which I was responding.

Like Andy says, the ZWB graphs are not reliable.

Starting with the first post in this topic, notice that Dimity said he was using the ZWB3 (like UG5 and U-330), those shots are not stacked (ZWB3 alone).
Then in his last post he shows a photo shot using ZWB3 + QB21 stacked.
There are no UG1, U-360, or ZWB2 shots in this topic.
So yes, the UG5 vs UG1 look is very different, even when stacked. UG5 stacked has UV+Blue+Green, U-360 stacked is UV only (using correct thicknesses).

Please note: For a more direct comparison with the other two stacks, I and showing UG5 (or U-330) 2mm + S8612 2mm on the graph, which will work fine,
however, I prefer and recommend, and I and usually use the UG5 (or U-330) 1.5mm + S9612 2mm thickness version of that stack (makes the green look a little better, I think).
Attached Image: UG1_2mm_x_S8612_2mm_vs_U360_2mm_x_S8612_2mm_vs_UG5_2mm_x_S8612_2mm_stacks.jpg

Edited by Cadmium, 17 August 2019 - 16:44.


#17 UlfW

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Posted 18 August 2019 - 08:41

I would like to add some more graphs.
The main filter differences are due to the UV-Blue-Green glass types.
The final characteristics is also very dependant on their thickness.

First from the Schott calculator, UG5 and U-330, both at their typical "bee's vision"-stack thickness, 1.5mm:
Attached Image: Screen Shot 2019-08-18 at 10.19.35.png

For comparison two real transmission measurements of two different ZWB3 filters, blue curve 1.97mm thick and red curve 2.01mm thick.
Attached Image: Screen Shot 2019-08-18 at 10.18.39.png
These graphs are adjusted to compensate for the surface-reflection losses in the measurement, to be more comparable to the Schott-calculator graphs above.
For the adjustment I guessed refractive index to be 1.5 for the adjustment, amplifying the measured graphs by 1.085.

I bought these ZWB3 filter glasses via Aliexpress and eBay from different vendors half a year apart, to see how bad Chinese filters might be.
It is clear that all four glass types are of the same family and that the Chinese glass has to be thicker to behave like the glass from Schott and Hoya.



Editor's Note: I bolded the conclusion because we all need to know more about ZWB glass.
Ulf Wilhelmson
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#18 colinbm

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Posted 19 August 2019 - 08:00

Beautiful photographs Dmitry
How do you decide they are 98% IR and only 1% UV ?
Which parts are UV ?
Cheers
Col

#19 Cadmium

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Posted 19 August 2019 - 19:28

Alone, un-stacked, the U filters all work similar to the UG1 filter, what I call Dual-band IR, mostly IR, with some UV, so the skies are blue(ish) out of camera, and the foliage is white or colored green or turquoise out of camera.
All of those U filter work a little like that when used alone, UG1 (U-360), UG5 (U-330), UG11 (U-340), UG2A...
UG1 is the MaxMax XDP "Dual Profile" filter.
UG1 (U-360) produce a more white foliage that the other U filters do, but if you white balance on the foliage then you can shift that for the others too.

#20 Andrea B.

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Posted 20 August 2019 - 15:39

Dmitry, I'm late to the party! But I wanted to say that I really enjoyed your Moscow scenes.
Andrea G. Blum
Often found hanging out with flowers & bees.