Software: Darktable

With the midyear 2021 I ended my worklife.

Adobe cloud is a rather expensive abo for an amateur and hobbyist, so I switched to Darktable and gimp.

Gimp is miles behind photoshop, but for my seldom used meager skills it is just fine.

Darktable is brilliant.

Of course the organizer part is rudimentary, but the modules are absolutely great, there are lots of tutorials and if you like mathematical or technical background you get it if you want it.

In the new version I fell absolutely in love with the negadoctor module to work with my scanned negs (color or bw).

Bruce Williams did a fabulous job with his about 100 tutorial vieos „hands on“ and Alexanders vids in „a dabble with photography“ give you the theoretical background.

Tip in Darktable:

In Inkscape import a nice sky and save it as vektorfile .svg in Program files-darkatbale-share-darktable-watermarks.

Now you can mask a sky and insert a new one as watermark (module watermark).

Ergänzung des Intuvia mit Cobi Bike Sport

Für längere Touren habe ich für meinen Bosch Antrieb das Cobi Bike Sport Set gekauft, das intuvia Display bleibt weiterhin für die Pendelfahrten über kurze Strecken.

Die Installation verlief nach zwei Wochen vorherigem Mitlesen in der Facebook Gruppe ohne Probleme, die wenig intuitiv zu bedienende App lief sofort gut und stabil auf meinem Note 20.

Ein Klickfix E90 Distanzset (ca. 20 Euro) erlaubt mir weiterhin die praktische Lenkertasche am Klickfix Lenkerhalter zu benutzen.

Der Tipp die Cobi App im geteilten Bildschirm zu benutzen (Android) war Gold wert, so kann parallel Locus o.ä. genutzt werden.

Eine Umrüstung der Daumen-Bedieneinheit auf eine Nyon Einheit (ca 45 Euro)erlaubt das problemlose Zoomen in der Cobi Karte.

Infrared Photography – purists beware, here are some digital info´s

First you have to decide if you want to do colour or b/w.

If you want to get colour images , use a 630 up to 720 filter, the filters below this wavelenght (750…950) will give you nearly no colour information…

Different sensors or films give remarkable different results!

The Standard IR Filter (720nm) is the classic IR filter. It allows some visible light to pass for color processing and gives good contrast for black and white. E.A: the Hoya R72 and Wratten 89b.

The 550nm IR Filter lets in the lots of visible light creating blue skies and blood crimson reds. It has the look of old IR films. It’s also good for infrared portraits, it keeps rather neutral skin tones (the 590nm will expose veins) and still provides color information.

The 665nm filter is in between the 720nm and the 590nm, showing more vibrant colors than the 720nm. The 665 comes out more reliably between different cameras and lighting conditions.

The 850nm filter and 920nm are good for black and white IR and will show bright whites and pronounced darks. With a custom white balance in camera, the picture is close to pure B+W.  E.a. the Wratten 87c.

With film test your focus and your exposure time with bracketing, both can be rather difficult to find and change rapidly and sometimes unpredictable with light conditions (we cannot see infrared;-) ).

Try to have the sun in the back or at your side, pics toward the sun often have very low contrast and lots of flares.

Best are sunny days and the trees and grasses should be green to get the „wood“ effect.

The best light source is the sun, but moonlight works well, too.

Camera flashes emit infrared as well as visible light so they can be used for infrared flash photography. It is possible to cover the flash with an IR filter to get rid of the visible portion of the flash and have a dedicated IR flash.

If you go digital:

Use raw files!

Use a modded camera with no infrared filter (or give it a try with a tripod and take your (long) time)

Use „live view“ if possible, so you should be able to rely on the automatic metering and autofocus.

In your raw converter:

If you shoot b/w use the LAB modus and the L (red) channel.

For colour

Set your white balance on the (white) greens

Use the cannel mixer to switch the red and blue channel.

(This is the usual result:

Red Channel: Red=0, Green=0, Blue=100
Blue Channel: Red=100, Green=0, Blue=0
Green Channel: Red=0, Green=100, Blue=0

Sometimes this is giving a better result:

Red Channel: Red=0, Green=0, Blue=100
Blue Channel: Red=100, Green=100, Blue=-100
Green Channel: Red=0, Green=0, Blue=100

Add Hue/Saturation

Apply contrast / use curves / dynamic contrast…

Add structure/details/clarity or however your software names it

Play with blending modes (contrast etc, e.a. luminosity)

Small variations in my White Balance or Channel Mixer settings (the two most important settings for IR) as well as the sequencing of the processing steps have often led to very different results.

Your IR results will depend on several more factors:

  • Camera make/model and sensor
  • Infrared filter used (there may be even variations between vendors)
  • RAW or JPEG processing
  • Your Lens
  • Type of vegetation and its ability to reflect IR light

Still for me to try:

Vittorio Sergi : If you like the usual 720nm faux color conversion with a blue sky, just skip the channel swapping step altoghether, grab a hue and saturation Adj. layer and slam the hue slider one all the way left or right so that the value reads 180 or -180, there you have a nicely done blue hue as it should be, given that you nailed white balance

720nm Filter, May 2020:

Closed bridges

https://photographylife.com/infrared-photography-720nm-filter

https://www.lomography.com/magazine/320088-6-infrared-films-for-that-otherworldly-glow

ttps://photography.tutsplus.com/tutorials/an-in-depth-guide-to-infrared-photography-setup-and-capture–photo-9533

https://www.scottdavenportphoto.com/blog/how-to-process-an-infrared-photo-in-on1-photo-raw-2020

Reflecta MF 5000 / Prime Film 120 pro

There were problems with shear endless initializing sequenzes.

I tried another computer (my laptop) with fresh install of cyberview X5 and short, direct connected USB cable, no such luck.

Trying with holder in, holder out, sometimes got a connection, sometimes not.

The german software site

https://reflecta.de/de/downloads/drivers2/~nm.50~nc.108/Driver-and-Software.html

had older versions than the US site:

https://www.scanace.com/sd.php?cid=2&pid=8&pcid=21

I made a firmware update to 1.37 – the scanner works again….

Humor me….

I had to give up my career as a photographer.  I kept losing focus.

Ever since buying a digital camera, I can only think of it’s positive points. There aren’t any negatives.

I bought a new camera. My wife asked if I will sell the old one.

Photography is a developing hobby.

How many hipsters you need to switch a light bulb? — Three. One switches the bulb, one makes photos with his phone and the third one blogs…

A penguin needs a passport photo. The photograph asks „Color or black & white?“ The penguin asks : „You´re looking for trouble?“

Cameras – diy pinholes.

I got lots of old dental x-ray film, so I made a pinhole cam out of an old

35mm film canister:

The camera
The dental film unpacked


The first film can x-ray pic 😉
You see the typical scratches from careless dev of the x-ray film!

A nice alu can is this:

Alu Can
Can in action

Loaded with very old and very expired (1967) ORWO paper:

UV Photography

This seems to be more in the digital realm, but we will see :

https://www.nikonians.org/forums/dcboard.php?uv-photography-resources&forum=214&topic_id=1677&mesg_id=1677&page=

http://photographyoftheinvisibleworld.blogspot.de/2011/01/simple-tutorial-for-reflected-uv.html