Monochromatic Filter Fun – the White Towel Test

Figure 1:  The White towel test on an orange filter

So, I take my walks in parks and on green-ways, and I notice the way people dress.  The women wear bright colors often, and the guys wear the drab and dreary: gray, faded blue, and white.  I guess that’s par for the species for various reasons we won’t delve into, but I had the fleeting thought that these fellows would not look very  much different if they were photographed in black and white, versus color.

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Graphics Software for Linux

Application ColorCorrection Video ARM Arch Paint Description
DarkTable Yes No Prelim/Devel only? Mask only? Photo edit – Strong CC
Gimp Yes As Animation Yes Yes Paint/Photo Edit
Inkscape Some No Yes Yes Vector Graphics
DaVinci * Yes Yes No No Film Finishing
Krita Yes As Animation Yes Yes Strong Drawing, Also photo edit
Blender Yes As MJPEG, others Yes Yes 2D/3D Drawing, Video edit
Lightworks* Yes Yes No Mask only? NLE for Video edit
Natron Yes Yes No ? Video clip ed, multi

Table 1: Some attributes of various linux graphics software entries ** 

Note that table 1 is not at all inclusive of every known graphics software project, but is an enumeration of a few projects that I am aware of and that have some substantial following of users. 

I won’t vouch for the absolute accuracy of the feature list, as I’ve used only one of these packages very intensively, and most of them not at all. I would advise to check out the features of the various projects, and make you own determination as to which may be a good choice to try. For the most part, the items are free, so there shouldn’t be much downside to a trial and error approach to this.

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Photography On the Cheap

Figure 1: The K5 is shown with a Tokina lens from the 1980s.

I started shooting with a bridge camera about two years ago (the FujiFilm s8600).   This was an attempt to bootstrap a photography interest of mine that had started in the early eighties (with an Olympus OM-1) – but which never managed to progress past the level of a novice, and hasn’t to this day.  There was always something more important to do, other than to teach myself to use a camera.  Now retired, I am devoting a lot of time to the task of catching up with the post millennium photography world.

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A Human Powered IR Detector

Figure 1:   A low pass (visible light blocking) filter,  that allows infrared to pass thru it unblocked.

Normally, IR is invisible to the human eye.  So, how could a person detect infrared radiation with the eye?  It can be done indirectly.  In figure 1 is the low pass visible light blocking filter known to all IR photographers.   It blocks visible light (notice that it is jet black, even when held in front of a bright lamp).

The thing is, the human eye can detect IR already.  It can detect even down to the level of upper level “far” IR!

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Easy-Simple IR Detector

Figure 1:  A very simple, cheeeep, IR detector for hobby photography

Posted 06-08-2018

A lot of hobby photographers are using IR cameras, or retrofitting common cameras to do IR photography. If the camera is a retrofit, then the photo hobbyist may not know the level of IR before a shot is taken.

This easy junk box build is a way to discover at least a ball-park guestimate of how much IR is present before a shot is taken.

The nice thing about this detector is that it uses a photodiode that reaches all the way down to 1.7 um (micro-meters) in the Near IR / Mid IR boundary area. Some newer cameras may be able to take photographs in that band.

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Twisted Photons

Figure 1:  Poor depth of field, or the blowing wind?

This blog is closely related to another one of my blogs (called videomiscellany.wordpress.com) – which currently is targeted towards the journal-ling of experiences related to a nascent video-making hobby that I’ve recently adopted.  A first thought was to include photography as part of that site, but I’ve decided to split the two things, and make a separate blog to document any random bits of photonic decoupage I manage to produce.  WordPress makes adding a blog pretty easy … so why not? I think I have seven now, mostly with names ending in “miscellany.”

I think I may be a miscellaneous person.

I thought PhotonRain would be a good name for a photography site, but it’s apparently a name used already (by a rock band?) – as determined by a quick search that may not be accurate.  Storm Of Photons is a second choice. While that name doesn’t belong to musicians, it’s considerably less lyrical. Oh well. Ever notice that all the good names are taken already? I guess that’s what happens when you live on a rock with 7.6 billion people, and half of them are on the internet.

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