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Determine EI and development time - few questions

bernard_L

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if you want to speed up testing of ISO, development time and agitation effects - and not spend a ton on film... stick a tab in the middle of the black frame
Thank you M Carter for this neat trick! Might be just what I needed to get going in some systematic calibration.
Also lots of good advice in this thread. Even if I don't agree 100% with all, but at least it is based on experience and formulated in a clear way.
 

jeffreyg

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Jessestr
It seems to me that you are trying to go in several directions at the same time. My recommendation is to use one film and developer combination and as suggested by others to determine your personal ISO for your equipment and technique. Doing that accommodates for film fog and actual shutter speeds etc. Do your testing at box speed and standard developing time/temp for the chemistry/film combo you are using. Once you do that you can modify for different situations but that should cover most of your shooting. Do that for each different film you want to use. I would consider scanning and or digital capture as a separate medium. In other words make the best print with the wet technique that suits you and separately make the best digital print that suits you. With one you are dealing with an emulsion on paper and the other with ink on a coated paper. I find I can get very similar results with darkroom prints and digital prints from scanned negatives but if compared side by side you can tell a difference but I label each for what they actually are. The same should go for your digital capture. Meter and expose film as film and your digital as a separate entity remembering your digital is probably recording everything as color and then desaturating to be monochrome.

http://www.jeffreyglasser.com/
 
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Jesse,
If you are getting good results with this set-up, then there's nothing inherently wrong with printing with the #4 filter. That said, if you find that some of your negatives are to flat to print even at the highest contrast setting, than that's a sign that you're underdeveloping. If I were printing everything at the #4-5 settings, I'd increase development a bit to compensate. However, if you're doing other outdoor work with a greater lighting ratio, you may not want to change anything. Alternately, you could develop the rolls that were shot in one lighting situation differently from "normal" to compensate a bit.


So, let's define "normal" and other contrasts a bit before we get off on a tangent. Most consider "normal" to be an outdoor scene with sunlit and shaded areas, blue sky and some clouds to fill in the shadows a bit. No clouds and bright sun, especially on snow/sand or at high altitudes is a contrasty scene. Scenes with both indoor and outdoor components, or dense forests with dappled sunlight can be extremely contrasty. Conversely, soft lighting on cloudy days outdoors can be very flat if you don't include the sky (the sky can be very bright on cloudy days; if it's included in a shot the overall contrast can be quite high, but the local contrast in everything but the sky can be quite low at the same time). Light from a nearby window can be very soft in quality, but due to rapid fall-off, the entire scene can be pretty contrasty. However, from your description, I'd say you're working with a fairly soft lighting ration. Again, I wouldn't worry about printing with a #4 or #5 filter for soft subjects unless I ended up with lots of negatives that were very difficult to print because of low contrast. Then I'd increase my development time a bit. And again, if you've got lots of rolls of film with the same lighting on them, it wouldn't hurt to have a dedicated development time for them. We Zone System users develop differently for just about every scene, but that's with sheet film where each negative can be developed separately. For roll film with scenes with various lighting and contrast on them, finding a developing time that lets you print everything satisfactorily is the ticket.


If you're getting good shadow detail at box speed, then stick with that. If you find you need more, you can always adjust later.

And, don't try to complicate things too much. If contrast is a problem, adjust your developing time. If shadow detail is a problem, adjust your exposure. That's really all there is to it in essence.

Best,

Doremus
 
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Jessestr

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Jesse,
...

And, don't try to complicate things too much. If contrast is a problem, adjust your developing time. If shadow detail is a problem, adjust your exposure. That's really all there is to it in essence.

Best,

Doremus

Thanks for everything. This solved everything. Now it's on to practice. Bought myself a new bulk roll of HP5 to start shooting again and start figuring out my new development time. My exposure seems quite good so luckily that's no problem. People are so helpful around here!