Doug Stockdale's Singular Images

December 29, 2016

Hasselblad 50mm Distagon lens in my future for 2017?

Filed under: Middle Ground, Projects/Series — Tags: , , , , , , — Doug Stockdale @ 6:09 am

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untitled (Middle Ground), copyright 2016 Douglas Stockdale

While working on my current project, Middle Ground, I have thinking that I might want to consider using my Hasselblad and start shooting this with color film in 2017. The biggest issue is that I do not have an equivalent Hasselblad lens for the digital gear I am currently using. I have decided to work with a wide field of view for this project, selecting a 28mm focal length and field of view using my Canon 5DMk3 and the 24-105mm lens (a little scotch tape does a pretty good job of locking down the lens at the focal length that I want). Yes I could also purchase a 28mm prime lens for the Canon, but I am also a bit cheap and this works pretty well.

The closest thing for the Hasselblad is the 50mm f/4 Distagon lens and using a 1.6 factor, this lens can provide about a 31mm equivalent field of view to my 5DMk3/24-105mm. So I taped the 24-105mm lens at what is about 31mm tested it on a drive to San Diego. Part of the drive I also locked (taped) the the lens at 35mm to compare (the 60mm Distagon is about 38mm field of view equivalent). The 31mm was not too bad, but the 35mm started to tighten the pictorial framing of what I want to capture a little too much, thus confirming that an investment in a Hasselblad 50mm Distagon should work. It would be nice to borrow a 50mm Distagon to try out, but my buddies near-by do not have this lens to lend. darn.

Since I will be acquiring a used lens, which of the four different 50mm Distagon models to look for? I think that the CF will do the trick for me, a bit newer and better (lens coating) than the original C model and as I am not focusing close-up the later FLE (Floating lens element) model is probably not necessary (and save me some extra bucks as well).

So the lens hunt is now on!

Cheers

October 18, 2016

On the scanner: 09-04-16 negative 12

Filed under: Memory pods, Photography, Projects/Series — Tags: , , , , — Doug Stockdale @ 12:55 am

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Untitled (Memory Pods project) copyright 2016 Douglas Stockdale

Cooking on the Nikon film scanner is negative #12 from my September 4th studio session working on my Memory Pods project. Hasselblad & 150 mm f/4 lens with two 21mm extension tubes, Kodak Portra 160 with an E.I. of 80, normal film processing.

Scan is taking a little longer as I did remember to scan at a 14 bit size (think I forgot for the last scan). Scan is at super fine: 16 times sampling for each scan pass.

The dried and slumping Memory pods are out of focus while the jumble and tangled elements are just in focus. This image kept coming to me while on vacation last week, thus the first of the new batch on the scanner now that we are back.

Next is the extensive spotting of the scan file, then all of the usual magic.

Cheers

August 30, 2016

Memory Pods – Film alternative

 

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Empty (Memory Pods project)  2016 copyright Douglas Stockdale

The photograph in this post is the results from my previous two posts; Hasselblad Ready for its Closeup and, part 2. Essentially I want to see if my Memory Pod subjects look like when captured on color negative film, in this case the Kodak Portra 160.

For the first step of comparing  8-1/2 x 11″ prints,  there are some subtle differences compared to the high resolution of the full frame Canon 5DMkIII and a lot of differences with the Samsung 5S digital images. The new film series is not meant to be comparable to the Samsung 5S with the SnapSeed post processing images. I think that I still need to tweak the dark values of this image a little and then make a 16×20″ for a print comparison.

Interesting that for the native RAW Canon 5DMkIII file of 22.3 mp, a 16×20″ print max’s out at 200 dpi with the file without having to up-resolution the file, while a 4,000 dpi scan of the 6x6cm color negative (Nikon film scanner) provides a file that can provide a 29×29″ print at 300 dpi. I need to double check how large the size print is if I use 260 dpi for print setting  for the film file (note: this turns out to be 33×33″ print). Thus to print both the Canon5DMkIII and the film scan at 30×30″, even with up-res of the digital file, I would expect to see some differences in the image quality.

The second part of the equation is the 24-105 L f/4 lens, which has macro focusing capability, on the Canon 5DMkIII versus the 150 mm f/4 Sonar lens with the two extension tubes for the Hasselblad. It would seem that these are pretty close to equivalent relative to full frame digital vs medium format film focal length (about 2x normal) & aperture. So far, inclusive, but the film image seems to have more depth of field than the digital image, which does not make sense to me.

I see that I need to create some more color negatives to be sure ;- )

cheers!

August 24, 2016

Hasselblad Ready for its close-up: part 2

Filed under: Photography — Tags: , , — Doug Stockdale @ 4:33 am

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Pentax Spotmeter V, copyright 2016 Douglas Stockdale

In my earlier post about determining the exposure index (EI) for the two 21mm extension tubes on my 150mm Sonnar Hasselblad lens, I was pinged with some questions about the +1 exposure compensation conclusion. I am realizing that with the advent of digital photography which really gained traction in the early to mid 2000’s, there is an entire generation of digital photographers who are not familiar with film and manual light meters, which should not be much of a surprise, but sometimes the extent and breath of the non-analog experience is interesting.

In the zone system exposure parlance you start with your basic EI, in this case the ASA of the film is the basic or neutral starting point. My Fiju Reala 100 color film has a ASA of 100, which I dial into my Pentax Spotmatic V, a manual 1 degree light meter. I acquired this current meter many moons ago with my earlier Minolta 1 degree spot has a “traumatic” moment (yep, while hiking I dropped in on the rocks, pretty traumatic for both me and the only light meter I had with me).

To complete my exposure compensation test, I varied the f/stop by a half stop stop per exposure. A plus one (+1) stop essential doubles the amount of available light during the film exposure over the neutral setting As example, I had set neural at 1/30 at f/4, thus the +1 was 1/15 at f/4 to double the amount of light during the exposure. I extended the test exposures to a +2-1/2 stops, which began to really over expose the film. The gray card I was photographing and film density was visually best to me with only the +1 stop. Now I could meter the scene with my light meter at set for the film ASA (e.g. 100) then take that meter reading and open one stop or alternatively I could set my meter ASA to 50 (half of the 100) and use the resulting setting.

The later option of altering the film ASA takes a bit less thinking ;- )

Btw, the nice thing about this 1 degree spot meter is that it has a number of settings; f stop for the lens aperture, T (time) for the exposure duration, ASA for the film speed and then something called the Linear Scale, which so happens is also a setting available with the older Hasselblad lens like my 150mm Sonar. Inside the meter, the linear scale is the value shown during the metering function. Once the Linear scale value is selected on the lens, the appropriate f stop and shutter speed T are coupled on the lens and when you change either the f/stop or the exposure duration, the other automatically changes due to the coupling function.

cheers!

Pentax_Spotmeter_V_exposure_dial

August 20, 2016

Hasselblad ready for its closeup

Filed under: Memory pods, Photography — Tags: , , , — Doug Stockdale @ 9:34 pm

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Hasselblad 500 C/M copyright 2016 Douglas Stockdale

The next phase of my Memory Pods photographic project is a switch-up to color film in conjunction with my Hasselblad. To obtain the close up framing I needed I added two 21mm extension tubes to my 150 mm f/4 Sonar lens. I had read about the exposure compensation required for a 21 mm extension tube with this lens and had guessed that since I had two of these, it would be a 2x exposure factor (my calculations indicated a +1 stop was needed).

As an engineer, I am prone to testing, thus figured the best thing to do is in conjunction with my gray card, complete an exposure compensation test to verify the anticipated compensation required for the two 21mm tubes. This is similar to the process I used when first learning the black & white zone system to determine my EI (exposure Index) for my Tri-X roll film in conjunction with my HC-110 film developer. In this case with the Kodak color film (EI 160), the exposure compensation determination is in conjunction with my pro-finishing lab in Irvine. Also a process needed when you buy the less expensive camera prism without the thru the lens light meter. (Hey, my 1 degree spot meter has not let me down yet!)

Then a slight hiccup in my giddy-up; after assembling the two extension tubes to the 150 mm lens and mounting the assembly on the camera, the shutter did not function. At all. After a hour (or more) of tweaking the camera, lens and extension tubes, I finally found my problem: one of the extension tubes was not cocked and primed. I had purchased both of the extension tubes used, but I had only previously used one of these tubes. If you are not familiar with Hasselblad camera gear, you have to cock the lens shutter to remove the lens from the camera body. So in my case, one of the 21mm extension tubes was out of sync with the rest of the lens assembly and maybe why this used extension tube was so in-expensive; it did not function properly and was probably assumed to be broken.

Thus I used a little trick with a very small screw-driver to carefully cock the 21mm extension tube and get the entire lens assembly back in sync. Presto! I was now back in business to finish my exposure testing and then high-tail the film off to the film lab.

And so now the processed film results are back and yes (drum roll, please) I am able to confirm a +1 exposure compensation is needed for this lens set up. So I will now be working on this project during the Fall with color film. I am so excited ;- )

Cheers!

FYI, one of my photographs from the Memory Pods project will be in the Irvine Fine Arts Center “All Media 2016” exhibition, with the opening September 3rd, 4-6pm.

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