The Foundation of Exposure
Dec 20, 2017 14:50:09 #
selmslie wrote:
No, I can't recall one either. Even my pre-digital meters showed me the EV on the dial.
Even older meters that read out in Luminance or Illuminance probably provided EV as well. It's not a new concept.
Even older meters that read out in Luminance or Illuminance probably provided EV as well. It's not a new concept.
The Weston meters don't show EV. They show Luminance in Cd/ft^2 but not EV. It's much better if they show EV because their dials are marked with Weston speed rating and not ASA/DIN or ISO.
Dec 20, 2017 16:05:26 #
Paul Sr
Loc: Colorado Springs, CO
Interesting update in practical useage. However, you are still doing the same principals but updated, more commonly available equipment. I was working with sensitometers and densitometers calibrated to NBS requirements.
Dec 20, 2017 16:27:48 #
Paul Sr wrote:
Interesting update in practical useage. However, you are still doing the same principals but updated, more commonly available equipment. I was working with sensitometers and densitometers calibrated to NBS requirements.
Yes, it amounts to the same type of information. But I have added a couple of wrinkles.
1. I have automated the process of adjusting the ISO.
2. I have included an adjustment that helps me work out the development time for the next test.
For example, I am currently testing Ilford Delta 3200 in Xtol 1+1. I exposed the test at ISO 1600 and developed for the equivalent time of 15 minutes. After I developed and plotted it I found that the ISO should have been 1280 and the development time closer to 16.25 minutes.
I also developed the same film in HC110(B) and Xtol stock and got much shorter development times but the ISO came out to 1000.
Dec 20, 2017 17:11:54 #
boberic wrote:
It's not really all that complicated. If you shoot in manual, you will learn in a month or 2 how 1 setting affects the others.
A month or 2?!? Unless one has a learning disability, with concentration and a little experimentation it should not take more than an afternoon to grasp the general relationship between settings and exposure. Using a digital camera, that is.
Dec 20, 2017 18:53:10 #
I sure hope I can get all of the above figured out before that bird takes off!!
Dec 20, 2017 19:23:25 #
rook2c4 wrote:
A month or 2?!? Unless one has a learning disability, with concentration and a little experimentation it should not take more than an afternoon to grasp the general relationship between settings and exposure. Using a digital camera, that is.
But you first have to get over the Auto habit. There are many photographers who have $3,000+ point and shooters
Dec 20, 2017 19:29:05 #
boberic wrote:
But you first have to get over the Auto habit. There are many photographers who have $3,000+ point and shooters
You can't get over the Auto habit. You either don't have it because you started out with manual or you never get over it.
Dec 20, 2017 20:19:12 #
As a film shooter first and foremost, I very much enjoy reading a post like this. Thank you for sharing your work!
When in a new location, particularly at altitude or a different latitude, I like to take a few initial readings and then make mental adjustments. I agree with the technique of thinking in EV, and then triangulation to a shutter speed and f stop--assuming a constant ISO.
When in a new location, particularly at altitude or a different latitude, I like to take a few initial readings and then make mental adjustments. I agree with the technique of thinking in EV, and then triangulation to a shutter speed and f stop--assuming a constant ISO.
Dec 20, 2017 21:17:18 #
tomad wrote:
In reading your post something else occurred to me... (show quote)
You can still use the old film equipment, or use the manual lenses on a digital camera. I do and think I agree about exposure and focus.
Dec 20, 2017 21:54:59 #
billnikon wrote:
If you add all the numbers up in this post you will get the cost of my NEW lens.
👍😂
Dec 21, 2017 02:07:33 #
[quote=rmalarz]Well, you've thrown a lot of figures here and like the numerous books published
Bob has written many well thought out articles here on UHH such as this one
http://www.uglyhedgehog.com/t-484554-1.html
I like his instructions on ETTR especially. But all beginners should read all his articles on exposure. Very helpful
Bob has written many well thought out articles here on UHH such as this one
http://www.uglyhedgehog.com/t-484554-1.html
I like his instructions on ETTR especially. But all beginners should read all his articles on exposure. Very helpful
Dec 21, 2017 02:12:21 #
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