A walkthrough of how a still life composition of an egg is lit with studio strobes.
It’s been a while since I’ve shot anything in the studio outside of film profiles, so I thought I’d spend a couple of hours today and shoot a proper fine art/still life in black and white.
This was shot digitally, however, I also went ahead and shot a number of images on Ilford HP5+ 120 roll film.
This is obviously lit, so as a learning exercise, lets walk through the lighting set up.
I used two lights. The first and most important was the base fill light. I took full advantage of the super reflective white wall behind the camera and turned it into a giant fill light by pointing a Paul Buff White Lightning X1600 strobe at it with an umbrella reflector that throws light 180 degrees. This was metered to f/2.0.
With that done, I then took another Paul Buff White Lightning X1600 strobe, mounted a 36 inch Octo-box on it from LumoPro and placed it camera left. I positioned and rotated it until I had the light feathering right across the background and then metered it to f/8.0.
For the composition, I kept it simple. A basic white egg cup, an egg, and a seamless white paper backdrop from Savage Universal.
Once that was done, I shot it at f/16.0 on a tripod with an APS-C camera and a 50mm prime lens. The camera/lens system make is pretty irrelevant as you can do this with pretty much any camera that has a flash hot shoe and interchangeable lens.
If you want to do almost the same thing on the cheap, you can substitute the real studio strobes with smaller and significantly less expensive portable speed-lights. Put the main light behind a nice big photo umbrella, though you’ll still need a white wall. For the seamless backdrop, you can substitute a white poster board for a significant cost savings, however, it tends to have a shinier almost glossy finish than the matte finish of a real backdrop paper from Savage, so keep that in mind. You may need to use a flag (black foam board) to feather the light on the backdrop.
If you send your StreetPan film in to Simple Film Lab, please refer to the tech sheet so you’ll know what to expect. It includes sample images along with downloadable DNG files to look at.
There have been a couple of refinements and some additions, detailed below:
Payment Options
You can now pay via credit card, or you can pay via PayPal. Just put your PayPal address in the same spot as the credit card number, and send payment when you drop your film in the mail. I’ll correlate the payment with the email address. You can alternatively just wait for me to receive your film and send you a PayPal payment request.
Push/Pull Processing
This option has been refined to reflect a change in time (which affects film speed and contrast) in 60 second increments. If you want finer grained control over that, then you can still specify a custom time in the custom film development section.
Scanning
The default option here has been changed to develop only. If you want scans, you will have to select something. This is to reduce the amount of confusion about what type of scan you’ll be receiving. Please refer to the scan types available to see what you get with each one.
Developers
You can now request that your film be developed with a number of Ilford’s line of developers, namely, DD-X, Ilfosol S, Microphen, and Perceptol. We may add HC/LC29 in the future, but for now, this is a pretty significant increase in choice.
Lab Notes
This section is for us to communicate to you! When we send your film back to you, we also send your order form back to you. What you can expect to see here is the twin check(s) of the film you sent in, and detailed notes of your development session for future reference. This way, as you send more film in, you have a frame of reference and can request changes or tweaks from there.
I’ve updated the Ilford HP5+ film review and moved it to its own tech page along with all the other films I’ve generated tech pages for.
Just as a reminder, if you want to use Simple Film Lab to get your film processed and scanned, please consult the published tech sheets so that you’ll know what to expect for results.
Just a quick note, I’ve completed and published the tech sheet for Ilford FP4+ Film.
If you send your film in to Simple Film Lab, you can now see what you’ll get if you shoot Ilford FP4+ film and send it in to us to process and scan in. Check the review out here. I’ve included a characteristic curve, a slideshow of sample images, and downloadable sample Adobe Digital Negatives of what you could get if your film was handled by us.
We’ve updated or are in the process of updating the pages for Simple Film Lab and the new updated order form should be online and available within the next couple of days.
Here are the highlights:
Standardization
We’ve introduced a new standardized film development regime based on XTOL and standardized our scanning protocol so that film you send in to us can easily be either printed onto photo sensitive paper in a darkroom, or can be scanned in using standard contrast indexes that correlate to black and white paper grades. This makes things much simpler and leads to other things listed below.
All Black and White Negative Films
We can now develop and scan in all commonly available black and white negative films in 135, 120, and 4×5 sheet formats, so send them in and get them processed! This is huge for us and we couldn’t have been able to realistically do it without standardizing our development environment.
Custom Film Development
Yep, we do that too. In addition to XTOL, you can request that your film be developed with D76, HC110, and Rodinal with custom dilutions, development temperatures, development agitation scheme, and development times. You can pretty much go nuts, though be aware that doing so can lead to unpredictable results.
Custom Film Scanning
Want your film scanned in with the equivalent of a grade 3 paper instead of the standard grade 2? No problem. We have a range of available contrast indexes that you can have your film scanned in at. It’s the digital equivalent of printing on said paper in the darkroom except you get a Digital Negative file instead. Combined with custom film development and you can get really creative if you want to.
Other File Formats
Don’t like Digital Negatives? No Problem. You can now request other formats without actually going the custom scan route.
There’s more than this, so check the Lab pages as we’ll be getting those pages updated with whats going on for 2018!
Spending some time with Google shows that there are numerous comparisons between Kodak Tri-X (400TX) and Ilford’s HP5+ film. Are they the same? Are they different? Is one better than the other? On and On and On. Let’s take as objective look as possible between the two emulsions and see what the deal is here.
Cut to the chase
If you don’t want to read any further, and just want a fast answer, then here it is: Kodak Tri-X and Ilford HP5+ are so close to each other that I can say that they are totally, completely, one hundred percent interchangeable. This means that you can shoot and process them exactly the same way in the same chemicals for the same development time. The end result will be close enough that you can’t tell the difference.
The evaluation
We are going to evaluate the two emulsions on two criteria: Tonal range, and granularity.
Tonal range
To evaluate the tonal range, we’ll shoot an 18% grey card on each emulsion, and shoot it from 7 stops under to 11 stops over normal exposure in full stop increments with a studio strobe. The exposure will be set via a Sekonic light meter incident reading and shot through a T-Stop rated lens, with the light meter reading within 0.1 stops of the actual amount of light hitting the grey card. To evaluate the density values for each stop of light, the emulsion will then be digitized with a DSLR using a studio strobe through the same T-Stop rated lens.
From there, the raw captures are evaluated and the average sample value from a 256×256 square in the middle of the scanned frame is calculated. This is done for each emulsion. This will give us a good idea of the density level of the emulsion for a given exposure value.
This is done exactly the same way for each emulsion. The camera position relative to the gray card does not change between each emulsion, and the focal point does not change between each emulsion.
Granularity
For granularity, this is actually pretty straight forward. Look at the scan of the correctly exposed 18% grey card for each emulsion in Adobe Lightroom at 1:1. The scans are just over 4200 dots per inch, which is more than enough resolution to actually digitize individual grains.
Development
To ensure that we’re as close as possible for each emulsion, they’re both developed in Kodak D76 1:1 at 20 degrees Celsius +-0.1 degree in the same daylight tank at the same time for 13:00 with 1 fast inversion every 15 seconds. There was a several minute pre-soak at 20 degrees of the tank/emulsions to get everything up to temperature. A 1:4 vinegar/water stop bath was used to stop development. Both emulsions were fixed in Kodak Fixer for 10:00 with constant agitation.
Concessions
Obviously, this is not up to scientific standards, however, it is within the tolerances that I can bring to bear with the equipment available to me, and I feel that my tolerances are tight enough to use with a reasonable amount of certainty in the results.
Results
Below are the results for each item being evaluated.
Tonal Range
Here is the chart of the two emulsions.
When looking at this, there’s a couple of things to remember: It’s not the actual values of each density step that matter because those will vary a bit due to variations in the the power of the strobe firing during the exposures, variations of power of the strobe firing during the scanning, and how many specks of dust and fibers there are on the emulsion in the scanned sample area, which will affect the average calculated sample value. In fact, I’ve repeated this test twice exactly the same way and have even done multiple scanning passes of each emulsion for each test and gotten different but similar results for every single density step. This is the nature of the medium. There’s a lot of moving parts and things that can affect the outcome.
The key takeaway here is the shape of the curve for each emulsion. I’ve included a combined curve that is the average of all the scanning passes of both tests for both emulsions with each end slightly extended beyond sampled values.
In short, both emulsions have the same tone curve and tonal range if developed in the same developer at the same temperature, for the same amount of time and same agitation.
Granularity
OK, what about the grain? I’ll let the image below speak for itself. You can right click on it and download the full image to look at it at full size if you want to look at it really close.
So, what are we looking at? A comparison of each emulsion scanned in at 4200+ dpi side by side at 1:1 in Adobe Lightroom. The grain structure is readily evident, and frankly, to me, the two emulsions are close enough in their granularity that at sane enlargement levels, they’re nearly if not completely indistinguishable.
Conclusion
With black and white film, the tonal range and granularity are really only the two things that matter, and as I said in the cut to the chase section, if Tri-X and HP5+ are shot and developed the same way, they’re interchangeable in terms of tonal range and granularity.
“I shot it at 1600 and pushed it 2 stops! It looks great!”
I’m sure we’ve all heard this. It’s largely a myth. All films are within a third of a stop of the manufacturer’s published ISO rating in most developers.
This is extremely true of C-41 color films because the processing is standardized and the films are manufactured to conform to that processing environment. Given that, we’re not going to talk about color films. If it’s rated for ISO 100, shoot it at 100. If it’s a 400 speed film, shoot it at 400. Any lab that is worth anything can give you a wonderful scan of that film.
For black and white films, this is also largely true based on how the ISO standard prescribes determining the speed of the film which is explained very simply:
Film speeds are based on the exposure required to give a log density of 0.10 above film base plus fog (fb+f).
Keeping it simple
Terminology aside, we can say the speed of the film is determined by the amount of exposure needed to get a certain fixed amount of density above film base plus fog. For the ISO standard, that fixed density is 0.10 log density above film base plus fog. You can use a different fixed density level and you can use a different density scale and that’s totally valid except that it’s not to the ISO standard.
Where the confusion comes in is film density in the shadows or minimum density areas of the emulsion develops at different rates depending on the film developer used. The developer used along with developer temperature and time spent developing affects how much density is developed.
Push that film!
Not so fast. You see, depending on the size of the silver grains in the emulsion, you do in fact need a minimum amount of light to hit each grain so that it will develop anything at all. Believe it or not, that minimum amount of light is amazingly close to the ISO rating of the film.
So what does push processing actually do?
Simply put, push processing develops more density for the silver crystals that did get enough light to develop anything. What this does is make the density difference large enough that you can see it and gives the impression that the film is more sensitive than it actually is. In Adobe Lightroom speak, it’s the equivalent of going into the Develop Module and pulling the shadows up without changing the black level.
It does not make the film more sensitive. Once you go below that minimum exposure level, no amount of processing is going to bring more density into the emulsion. All you’ll do is develop more film fog.
So how come some films still look great pushed?
That’s because normally exposed and developed film typically has its film base plus fog at 6 stops below middle grey. That makes for some awesome blacks. If you switched over to the Exposure Index method of exposing, and under exposed the film by a stop, the film base plus fog effectively moves up by one stop to 5 stops below middle grey. This still results in totally acceptable blacks for most exposures. If you under expose by 2 stops (exposing a 400 speed film at EI 1600) the film base plus fog moves up to 4 stops below middle grey. This results in your blacks starting to look dark grey and a little muddy. This is where the push processing come in. More development time adds more density to what shadows you do have which makes the shadow areas have more contrast which to a degree counteracts the raised film base plus fog. There is a point of diminishing returns because once again, there is a minimum amount of light you need in order to develop anything above film base plus fog.
So that’s it in a nutshell. Pushing film is a myth. If you switch to a different exposure standard (like Exposure Index), then you can get a little more performance out of your film, but at the end of the day, the worst thing you can do is under expose your film.
You must be logged in to post a comment.