Some Spooky UV Halloween Vibes

[mason2spectral]

Had the chance to work 1:1 with a very patient model who let me take out my UV filter stack at a Halloween photo event.

All images were taken on A7R full spectrum with ZBW2 + IR CUT + Kolari Hotmirror Gen1 on Sony 55mm 1.8

It was a bit overcast, so I was pushing my camera to its absolute limits!

 

All images were lightly tweaked and denoised in DXO PhotoLab 5 Elite, I used In-Camera WB

 

Happy to receive feedback, thoughts, and suggestions!

 

ISO 25600, 1/60 sec, f/2.5

 

 

For Comparison: in-camera jpeg VS raw edit (same settings as previous)

   

 

 

 

ISO 10000, 1/60 sec, f/1.8

 

ISO 12800, 1/40 Sec, f/1.8

 

ISO 12800, 1/60 Sec, f/1.8

[colinbm]

Fabulous model & looks great in UV.
Why did you use the Kolari Hotmirror Gen1 for a UV photo ?

[Nate]

Nice pics! Model looks great. 

[Kai]

Impressive work!
Thank you for sharing :)

[mason2spectral]

20 hours ago, colinbm said:

Fabulous model & looks great in UV.
Why did you use the Kolari Hotmirror Gen1 for a UV photo ?

@colinbm It's a bit interesting, actually! My IR block filter didn't completely block all the IR light and had some seepage. When looking for a solution I noticed that Kolari had updated their hotmirror filters and that the Gen1 hotmirror I already owned was basically just a fancier IR block filter but of tighter constraints quality/curves than the tangsuino bg39 (on paper). It supposedly lets through about 80-90% of UV light above 365nm and should have proper coatings for supposed reflections or dirt/smudges or whatever.

 

My original post is buried here: 

https://www.ultravioletphotography.com/content/index.php?/topic/5289-my-first-attempt-uv-bg39-wb2-some-portraits-and-buildings-any-cc-appreciated/&do=findComment&comment=55327

 

When using either separately, I seem to have some ir seepage, though a lot less with just the kolari than the bg39. Stacking both pretty much guarantees no ir light gets through...

[colinbm]

Thanks mason2spectral

I understand now.

[OlDoinyo]

You managed to avoid the eye-fog effect caused by internal fluorescence in the lens of the eye that is common in other UV portraiture.

[Ming]

On 10/28/2022 at 10:11 PM, OlDoinyo said:

You managed to avoid the eye-fog effect caused by internal fluorescence in the lens of the eye that is common in other UV portraiture.

Please explain this phenomenon a little more.  Is it UV induced UV fluorescence?  Thank you.

 

[OlDoinyo]

11 hours ago, Ming said:

Please explain this phenomenon a little more.  Is it UV induced UV fluorescence?  Thank you.

 

I don't know, honestly, but I have seen it in quite a few UV portraits. I have always (without thinking) assumed UVIUVF, but alternate explanations are possible, such as UV turbidity of the lens which might not bleed over into the visible.

[Ming]

Yeah, I have seen it too.  Thank you.