A Note On Long Exposures, Reciprocity Failure For Kodak Ektar And City Night Shooting

Kodak Ektar

City Streets At Night

General for a city light scene you can ignore reciprocity failure and expose at ISO 100 f8 or f11 to capture car light trails. These f stops work with almost any ISO 100 film when trying to capture slowly moving light trial. It does depend a bit on the lens and the angle and speed of motion. I usually use f8 for wider angle lenses and f11 for standard lenses.
Exposure time depends on whether or not you want to blow out street lights and how bright you want mid greys to be.

Reciprocity

Without going into the The Gurney-Mott Theory or subsequent rewrites the standard characteristic curves can be used to accurately predict how much compensation is needed for what part of the image. Of course you have to do conversions to put it in terms that you can use it on the different zones of your image.. When you do long exposures you are effectively working in the lower part of the curve how much of the image and by how much depends on where each zone lies on the curve and where you want it to end up in terms of density.

Note that each colour curve (blue having lower failure) has a different shape hence explaining the inconsistent colour balance in the lower extremes of the chart.
To form a stable latent images multiple photons (light as a particle) must impinge on the same area of the film within a very short time frame or the latent image doesn’t form and the crystal site decays (relaxes) back to it’s ground state. When the number of photons per second goes down to a low enough number the chances of the next photon hitting the crystal before it relaxes starts to decrease. No amount of pre-flashing or witchcraft will bypass reciprocity failure except maybe for processes like hypersensitization.

Reciprocity Failure For Ektar (1)

metered time — adjusted time
1 —————– 1.4
2 —————– 2.9
4 —————– 6.3
8 —————– 14.1
15 —————– 29.7
30 —————– 68.4
60 —————– 159.0
90 —————– 261.2
120 —————– 371.7
240 —————– 871.5

(1)Table came from Lee (see comments) measured by his standards and should be considered as a starting point where adapting exposure to account for reciprocity failure is important.

Toronto Nights Old Style
10 second exposure at  f11 in a 1953 Kodak Retina IIa
Efke KB21 Expired April 1977

First Look A Day With The Sony ZL Cameraphone

I had to replace my old Motorola cell phone because of planned obsolescence as it decided to go crazy and send a continuous stream of empty text message to the first land line on my contact list (sorry about that).

I replaced it with a Sony Zl “smartphone” The camera is 13 megapixels, sigh now we have got that out of the way on to important things. The screen is ultra high resolution with a more natural colour rendition which makes what you see more of a what you get then most of the flashy high saturation tablet/smartphones.

Portrait Aspect Ratio Of The Screen

Interesting aspect ratio in portrait mode if you tire of the normal 4:3 of a DSLR

The camera has many creative modes that differ from the normal after the fact as you adjust them by touching the screen before you take the shot and not in post. This I find even if the mode is sort of gimmicky (like the image below) it makes me think more about the composition before I take the shot.

Sketch Mode

Actual like the selective colour mode even though normally I’m not a big fan of doing it after the fact. You select the colour by using your finger tip to brush in the colour before you take the photo.

Selective Colour Orange

Selective Colour Orange

Selective Colour Red

Selective Colour Blue

B&W Mode

Kaleidoscope Mode Is Amusing

The next three were taken with a deep red Infrared filter held over the lens. Infrared sensitivity  with the new sensors is not as good as the older less sophisticated sensors.

Automatic in camera HDR mode works as long as the subject doesn’t move. Normally either the top would be blown out or the bottom would be too dark

Late bloomer: this 75 years old agave americana at Allen Gardens Toronto blooms once and then dies.

On the fly hand panoramics are also an interesting  feature except when as in this case there is a moving object.

Stretch Limo Pano

Using the smile detector function to fire the shutter seems to be a failure!

Closeup where is the beauty mode when you need it?
I can see the high speed burst mode could be useful for capturing action. The below annoying gif is made from a 81 photo burst mode. 
  1. Shoot in burst mode
  2. Drop shots in MS Movie Maker (free)
  3. Set zero inter frame transition time
  4. Set duration of every photo 0.1 seconds
  5. Make a short movie clip
  6. Drop movie into Microsoft Research Cliplets (free)
  7. Fool around in Cliplets 
  8. Export final product
  9. Have fun driving people crazy

A Vilk Trying To Fly
What I saw

Because I shoot mainly medium format film I use a lightmeter so as a possible travel light replacement I tested many of the android light meters apps and ended up with this one play.google.com/store/apps/details?id=com.dq.fotometroNa

From 1 ev to bright sunlight both in incidence and reflective mode it was within 1/2 of a stop when checked against 2 different Gossen meters plus a Nikon and Canon film camera.

The accuracy IMHO has a lot to do with what model of cell phone you have yet some software was clearly better than other software. The spotmeter function is quite useful.      

Silver Alchemy – Xtol Plus Rodinal Part II

Overheard on the street: “My dad say I should remarry him”
Kodak Tri-x developed 5min. Xtol 1:2 and then 4 min. Xtol 1:2 + Rodinal 1:115 25c

This is a short update on my original article of adding Rodinal to Xtol. I have been adding Rodinal to Xtol to good effect since 2010.

So why change now? With a purchase of a higher resolution 35mm scanner I’m finding that I want even more control both of the grain and of the compensation in the shadow areas. While I can do it by controlling the ratio of Rodinal to Xtol it becomes a bit tricky to manage all parameters especially when it comes to temperature compensation.

In the last few months through a series of experiments I have come up with this variation on my original method which gives both good results and fine control.

Set up the dilution ratio of Xtol as normal.  I try to keep the normal developing times between 7 to  no more than 16 minutes. For the last 4 minutes I pour the xtol into a container that has had rodinal added, then pour it back onto the film and then develop the remaining 4 minutes.

Mohawk In Support Of Maggie’s: The Toronto Sex Workers Action Project
Same roll as above

Still Mine
Kodak Kodak TMAX 400 developed: 5min. Xtol 1:1.125 and 4 min. Xtol 1:1.125 + Rodinal 1:115 at 22c  
Fresh Air
Fomapan Action 200 developed: 5min. Xtol 1:1.125 and 4 min. Xtol 1:1.125 + Rodinal 1:115 at 20c

Straight Out Of The Camera (SOOC) Photograph Of The Year (POY)

What does straight out of the camera actually mean?

 For most categories of art or non professional photography all this talk of
purity and “SOOC” is bull! I especially hate some film or in some cases digital photographers  that say things like “This is straight out of the camera, I don’t
believe in altering the image” or some such nonsense. What do they think
showing an image on the screen is besides an alteration, and believe me
there is nothing natural about scanning or the guts of a DSLR.  Read here for another take. 

On my part I consider the taking of the photograph the most important part and what comes later just window dressing.

The Shaw-Pellegrin Controversy Around The Photographer Of The Year Awards

This year there seems to be a lot more then the usual controversy over
this year’s World Press selections for photograph of the year.

www.designboom.com/art/world-press-photo-2013-image-alter…

nppa.org/node/36604

www.theverge.com/2013/2/20/4009724/photo-contest-winner-c…

www.petapixel.com/2013/02/19/why-do-photo-contest-winners…

Everybody loves a real life soap opera. This is a failure of
the editing process for photojournalism, what ever happened to fact
checking?

Not to side with Pellegrin but his I’m a blogger not a reporter reasoning
is some what of a cop-out while his hiding behind being a critic might be a
more valid reason.

I think the bigger picture is the partial lack of standards for the POY
organization. It’s not as though this is the Oscars but it is looking
more and more like show business. Hopefully next year might be
different:

lens.blogs.nytimes.com/2013/02/28/prize-winning-photos-an…

It’s not as though there aren’t any standards for “SOOC” at least for reporters. It’s a pity that the POY didn’t know about them until after the 2012 awards:

Interesting that the last photo in the above article wouldn’t even pass:

A handbook of Reuters journalism
A guide to standards, style and operations

Photoshop and how to use it
Photoshop is a highly sophisticated image manipulation programme. We use
only a tiny part of its potential capability to format our pictures,
crop and size them and balance the tone and colour. For us it is a
presentational tool. The rules are – no additions or deletions, no
misleading the viewer by manipulation of the tonal and colour balance to
disguise elements of an image or to change the context.

Reporter

I will leave you with some famous quotes:

“To quote out of context is the essence of the photographer’s craft”


“You see something happening and you bang away at it. Either you get what you saw or you get something else– and whichever is better you print.”


“The photograph should be more interesting or more beautiful than what was photographed.”

“The photo is a thing in itself. And that’s what still photography is all about.”

Blood On Their Hands

Analog As Opposed To Digital

Why do many film photographers get upset with the term analog photography?

Analog or it’s British cousin  analogue is just another example of the ever changing language of technical babble. You don’t have to like it, but once it is in the common vernacular the game is over and you are stuck with the label at least for a generation or two.. Maybe in another 50 years it won’t be analogue or digital, but rather antique photography or maybe a non quantum 2d recording (NQ2R for short).

If the analogy to electronics doesn’t appeal to you then you might want to consider the original more general pre-electronics era meaning of similar to or proportional to as being more appropriate to photography.  Actually that makes a lot of sense as a photograph could be seen as a proportional projection of the original scene.

More serious misnomers exist for example how about using the Sloth a South American animal as a model for one of the seven deadly sins? The sloth slow metabolic rate is a survival trait and does not deserve to be called a deadly sin.

Neon Sign, New Building And Falling Steam

But we decide which is right.
And which is an illusion?

Photography Year 2012 In Review

2012 Was The Year Of The Dragon

Gone Walkabout Up Country As Almost No Snow In Toronto

Toronto Islands  In January

The Diffusion Of Occupy Toronto Into The Collective Memory 

Trying Out a Couple of New For Me Medium Format Cameras

From The Mamiya RZ67

Hasselblad 500cm


In and Around the Streets Of Toronto

A Couple Of Double Exposures For Old Times Sake

In And Around The Streets Of Paris

Some Portraits And Modeling

Some Countryside

The Year Wouldn’t Be Complete Without Some Strangeness 

Developing Film And Water Spots

Following on from my blog posting titled Odds and Ends In B&W Film Development I  thought I would continue with the topic of the final rinse.

Final Rinse Update – In the past I had spots now none:

The final rinse is 3 minutes in distilled water; After the 3 minutes I 
then add 1 drop of Edwards LFN wetting agent.; Shake really well for 5   seconds, wait  until any foam dies down; Then remove film from
liquid. Shake off excess water and hang to dry.



Absolutely no spots!


Notes:

The distilled water adds  about $0.15 per roll but it seems to be worth it, The trick seems to be prior to adding the wetting agent leave the film in the distilled water for long enough to dilute (replace) any of the tap water in the emulsion.

Over washing and washing the film like a raccoon can do irreparable damage to the emulsion.

Obviously if you get white spots with tap water you need distilled for the final rinse if you don’t get them then you don’t.. And of course negatives without white spots and drying marks are better than those that have them.

I did an experiment watching under a microscope one drop of distilled water and one drop of my tap water dry on a microscope slide. Absolutely no observable difference! So why use distilled water? Distilled water removes most minerals from the film gelatin layer so it doesn’t come to the surface later and cause water marks when it drys. The final rinse must be long enough for the gelatin to become in equilibrium with the rinse water. The reason I reuse the same “distilled” water from the final rinse for the photo flow or wetting agent stage is that I want the water within the gelatin to be in equilibrium with the water that has the wetting agent. This and a short cycle time with good agitation keeps the wetting agent surfactant mostly on the surface where it belongs.

It’s all about chemistry, surface chemistry, diffusion and equilibrium.

Why not dishwashing soap instead of a wetting agent? Because it’s a false economy and they contains impurities, contaminants that could cause problems. Wetting agents designed for film do not have the extra impurities that are added to dish water soaps and are only a couple of pennies per film.

Tip: 

Sometimes I find stuff floating in my developer or fixer, to remove pore the liquid through a small fine stainless sieve used for cooking. Don’t forget to rinse the sieve after using to prevent corrosion.


Drying

 I recently I brought an old Kindermann Rapid dryer. I then taped a dust and pollen filter over the fan air inlet so for a total cost of $20 I can now have dry, dust and spot free film ready to scan within 45 minutes of development.

There are many DIY dryers out there on the web including those made with garment bags. This MacGyver like method although I haven’t tried it yet, it looks brilliant!


Warning

Depending on your water the use of distilled water may be dangerous overkill. A friend of mine after many years of no problem started to have problems with spots this went on with the spots getting worse over the year, Finally he gave me a spotted frame which under a microscope showed fine surface crazing all over with the spots caused by more severe surface damage rather than by left over chemical residue. With the proof he finally followed my advice and used the Ilford method of rinsing. Suddenly no problems! His problems started when in his own words “Someone told me I should rinse more so I started to rinse more and the more I rinsed the bigger the problem so I added more rinsing aid and more distilled water. Ended up rinsing  like a Raccoon.” 


References

Why Is Water The Universal Solvent

Diffusion

Surfactant

Vuescan, Lightroom and DNG Plus The Lomography DigitaLIZA

Fall Path

My blog on Plustek scanner mentioned my purchasing of the scanner software Vuescan to replace the software that came with the scanner. Up to now I have avoided using it for my epson v500 as I find the epson scanner software very easy to use. For a change I decided to try the Vuescan DNG output. DNG is equivalent to a RAW file only in a Adobe format. This turns out to have several advantages if you happen to own Lightroom or Photoshop.

  • You don’t have to fuss with scanner settings for each individual image (Just set gain and base colour on an unexposed part of the negative once per roll)
  • You can extract and save all the information that the scanner can provide in a standardized archival form
  • Fits into Lightroom’s non destructive workflow so reprocessing does not degrade the scan.
  • Merges your film and digital workflow
  • You can make and apply your own colour profiles, curves, fx and other post processes as many times as you want
  • You start out with a RAW file that has more information and less noise then a conventional tiff scan with some curves applied during the scanning phase

Warning the Vuescan DNG has a linear gamma of 1 the same as a scanner so opening up a file out side of a gamma aware program will result in an image seeming to have a very strange contrast curve.
New note on Vuescan/Epson V500 here.

For Pixel Peekers

Have a look at this example of 35mm Nikon FMn2 105mm hand held street portrait on HP5 film developed in Xtol + Rodinal and scanned on my Plustek 7400

Original scan from the Plustek B&W scanned as a 48 bit tiff

1:1 with some slight sharpening in post

Lomography DigitaLIZA

I have to give the Lomography DigitaLIZA  120 Format film holder a 4 out of five rating compared to the epson holder 2.4/5 rating. It’s so much better for keeping curly film flat. It’s also easy to load the film.

Tips:

  • For the digitiliza make up a template that you can place on your scanner bed to make it easy to align the Digitaliza with the scanner bed (I made mine out of a stiff cardboard looks like a thick L) be careful not to cover the calibration area of the scanner
  • I use a rocket blower rather then canned air to blow any dust off the negative. 
  • A pair of silk inner liner gloves (from a sports or outdoor shop) are much better then cotton gloves for handling negatives

 

    What Is And What Isn’t Street Photography?

     I have a personal definition of Street Photography. It is
    personal because I don’t believe a formal definition of what is and what isn’t
    Street Photography does anything except to fix firmly in the past our idea of
    what street photography should be.
    Personal definition
    what is Street Photography:
    • Urban
      environment
    • Range
      of distances: from up close and personal to across the street. (Across the
      street being more urban life scene less traditional street.)
    • The
      subject should scream life and humanity all those personal quirks and
      everyday little and big things that make us human
    • The
      subject does not have to be a person or persons regardless it does have to
      evoke an image of humanity
    • There
      has to be some transit nature to the subject. An example: A half eaten ice
      cream cone melting on a pavement evokes memories and tells a story
    • Generally
      the single photograph should stand by it’s self even when it’s included in
      a larger photojournalist type story. Whether or not the single image shows
      truth in the photojournalist sense is not relevant.
    My Personal
    Definition of What Definitely Isn’t Street Photography
    (doesn’t mean I
    won’t take the shot any way)
    • Beach
      scenes; nature scenes, country roads; Architecture, statues and art as the
      primary subject.
    • Static
      objects including empty streets (too obvious and trite) although fog
      street scenes are tempting
    • Road
      traffic where the cars, trucks … are the subject even is it’s a long
      exposure and shows pretty light painting effects
    • Too
      much staging although I hate getting into the street portrait debate
    Maybe
    • Sometimes
      a backside is just a backside and a snapshot is just a snapshot, trite is
      trite in whatever guise
    • Geometric
      organizations and patterns, can be really interesting but if too clinical
      and clean without the grit it’s more of an abstract
    • Sometimes
      a sign mixed with people work as street, it depends if the subject is the
      people rather then mostly the sign.

    Most important: If you see a shot take the shot! If you take a shot then consider staying a minute or two and taking another the shot from several different positions and angles. Worry about any definitions of what is or is not street afterwards,

    By my definition here are some borderline Street photographs. Except for
    the first one they all came from the same roll of film. Remember there is
    no right or wrong answer.

     

    Robocall: “Democracy Can Kiss My Shiny Metal Ass”

    Body Language

    Freshly Squeezed
    At The Bay

    New Kodak Portra 400 Beautiful When Pushed One Stop – Review Update

    In my first review of the new Kodak Portra 400 I had one negative about the film

    Cons : Needs post processing to bring out contrast 

    Turns out there is a splendid work around: Unlike most other colour negative films Kodak Portra 400 shooting at ISO 640 and developed pushed 1 stop in normal C41 chemistry really brings out the contrast  and colors. These days this is my preferred way of using the film.  The dynamic range (contrast ratio) is increased at the expense of a slightly decreased latitude. In addition an extra 2/3 to a stop of increased ISO really helps out in hand holding medium format cameras.

    Beware that unfortunately not all labs will correctly push c41 films.

    Kodak Portra 400 Shot at ISO 640 and pushed one stop in C41chemistry

    Slide show of some more pushed Kodak Portra 400