Jump to content
UltravioletPhotography

Flowers, dog and torches


Recommended Posts

Other non-specific photos, just something I wanted to share.

 

Camera: Full-spectrum Canon EOS M

Lens: Soligor 35 mm f/3.5

Filter: ZWB2 (2 mm) + Chinese BG39 (2 mm)

 

In some images, I corrected the overexposed areas in IrfanView by replacing the blown-out colors with white.

 

Dog with UV-purple daisies (left), UV-white flowers (unknown, they are magenta in visible light, center) and UV-yellow dandelions (right).

f/4(?), ISO 6400, 1/30 s exposure

post-284-0-72783900-1619208882.jpg

 

Same flowers, another angle and without dog.

f/22, ISO 100, 240.1 s exposure

post-284-0-97213300-1619212090.jpg

The f/22 was necessary as I really needed a deep depth of field. I also have a f/11 version.

 

The white flower in detail (another plant, another day, but same flower). I will take a visible reference if necessary.

f/11(?), ISO 100, 4 s exposure

post-284-0-55019700-1619212240.jpg

 

UV torch with a ZWB2-like filter, and a normal white LED torch. Reference taken with my smartphone (Samsung Galaxy A40). The white torch has a TIR lens (Total Internal Reflection).

f/1.7, ISO 40, 1/241 s exposure

post-284-0-78287900-1619213608.jpg

 

In UV. f/11(?), ISO 100, 30 s exposure

post-284-0-74214100-1619213729.jpg

 

f/11(?), ISO 100, 4 s exposure

post-284-0-13593500-1619213965.jpg

 

I can try to see how the Convoy S2+ torch looks like in UV with its 2 mm thick U-340 filter. I expect it to look a bit darker and more greenish.

Link to comment

Love seeing the dog in UV !!

He is very reflective. :smile: :rolleyes:

Maybe put that one in the Fauna section. We rarely get animals.

Link to comment
Andy Perrin

Stefano, you can probably raise the exposure a bit using the RAW for those. They seem dark. It is a dark world in UV but it’s possible to brighten a bit in post processing.

 

I like the first 3 photos up top. The flashlights are interesting.

Link to comment

It is always a judgement call, isn't it? Especially difficult with a very UV-reflective dog. But I would also suggest a bit of a raise in either the camera or the converter. We should be able to make out some UV details, yes?

 

Loving on Sugar! Looks like a sweetie.

Link to comment

New images. I tried with the Convoy and, as I predicted, the filter is greener.

 

In some images, I tried to fix the overexposes areas replacing the color with white in IrfanView.

 

f/11(?), ISO 100, 4 s exposure

post-284-0-25490600-1619364827.jpg

 

f/11, ISO 100, 4 s exposure. I took several images at different exposures, to be able to make an HDR image in the future like Andy did.

post-284-0-34445100-1619364910.jpg

 

f/11(?), ISO 100, 8 s exposure

post-284-0-82247200-1619368299.jpg

 

f/11(?), ISO 100, 8 s exposure

 

post-284-0-37699900-1619368465.jpg

 

f/4, ISO 6400, 1/100 s exposure (handheld)

post-284-0-32613400-1619365218.jpg

 

Also, I forgot how bright this torch is. It easily outshines the Sun. Ulf showed this once (I will add the link with my phone. I don't know why, but I can't make link words from my PC).

 

Link: https://www.ultravioletphotography.com/content/index.php/topic/2921-in-the-spotlight

 

This was under strong sunlight:

 

f/(?), ISO 800, 1/30 s exposure

post-284-0-25638300-1619366588.jpg

 

With the torch a few centimeters from the tile (remember, under early afternoon sunlight on a sunny day!)

f/(?), ISO 100, 1/30 s exposure

post-284-0-52425000-1619366681.jpg

 

Looks like dust jumped on the sensor again. Cleaning it is a pain everytime.

post-284-0-25490600-1619364827.jpg

post-284-0-34445100-1619364910.jpg

post-284-0-32613400-1619365218.jpg

post-284-0-25638300-1619366588.jpg

post-284-0-52425000-1619366681.jpg

post-284-0-82247200-1619368299.jpg

post-284-0-37699900-1619368465.jpg

Link to comment

I have it, it helps but sometimes it sprays liquid "air" (it isn't air, but another chemical), and when this happens it leaves some residues and I fear the thermal shock can crack the coverglass (the only glass I have above the sensor). Sometimes I use a very small amount (much less than a drop) of window/glass cleaner and a clean brush (those you paint with, but never used for that of course) and clean the coverglass as best as I can. The very action of using the brush can leave new dust particles, and I have to do everything again...

 

I clean the rear of my Soligor too, because I think that dust can fall from the lens. I always leave the lens mounted, so I don't understand how dust can enter, maybe from the helicoid.

Link to comment

good points. I have been tempted to use canned air but will refrain.

 

I once saw a recommendation that before cleaning a sensor, you should run the bathroom shower for a minute or two which - supposedly - settles the dust. Then go clean the sensor in the bathroom. :lol:

Link to comment

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now
×
×
  • Create New...