Sunny 16 Rule
Nov 2, 2022 19:27:02 #
Maybe the exposures are all correct (showing what they should) because it wasn't SUNNY! 
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Nov 2, 2022 19:54:14 #
selmslie wrote:
It does.
Sunny 16 is just a starting point, EV 14.7.
Sunny 16 is just a starting point, EV 14.7.
I should have said LV (light value) 14.7. At ISO 100, EV=LV.
Exposure Value shows the tradeoffs between aperture and shutter speed. The EV values are shown as whole numbers.
EV(ISO 100)/LV 15 is only 1/3 stop darker than Sunny 16 and it's 1/3 stop safer when it comes to highlight protection.
You can learn more in Light Value (LV) 15
Nov 2, 2022 19:56:09 #
Bill_de wrote:
Maybe the exposures are all correct (showing what they should) because it wasn't SUNNY!
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It was sunny. You can see the shadows on the shady side of the branches.
Nov 2, 2022 23:35:13 #
mwsilvers wrote:
The Sunny 16 "rule" was based on setting the aperture to f/16.
As a starting point. You can use any equivalent exposure with sunny 16.
Nov 3, 2022 00:25:55 #
DeanS wrote:
Can’t figure out why the “Sunny 16 Rule” doesn’t work so well on my 5D/IV. The lens is Canon 70-200 F4 L/II.
Conditions: Bright, sunny, mostly clear sky. All three shots SOOC.
First (IMG_3321): A Priority, F16, 200 ISO, 1/20 Exp (Yes, 1/20th SS)
Second: (IMG_3322): Manual Mode, F16, 200 ISO, 1/200
Third (IMG_3323): Manual Mode, F8, 200 ISO, 1/200
Comments?
Thanks
Conditions: Bright, sunny, mostly clear sky. All three shots SOOC.
First (IMG_3321): A Priority, F16, 200 ISO, 1/20 Exp (Yes, 1/20th SS)
Second: (IMG_3322): Manual Mode, F16, 200 ISO, 1/200
Third (IMG_3323): Manual Mode, F8, 200 ISO, 1/200
Comments?
Thanks
I looked at the photo ephemeris, at the time the photos were taken, the sun was about 28 degrees above the horizon. On july 1, that would be similar to taking the pics about 6PM. That is pretty low in the sky with the sun shining through a lot of atmosphere. Result: the sky is not as bright as midday during the summer. Less light means you need a slower shutter speed as in photo #1 (plus more than 3 stops vs. sunny 16) or open the aperture as in photo #3 (plus 2 stops vs. sunny 16). Save these photos and compare them again to taking the picture at 6PM during the summer next year.
Nov 3, 2022 00:56:16 #
mwsilvers wrote:
Yep, on a TTArtisan 17mm f/1.4 manual focus lens mounted on my Nikon Z fc diffraction kicks in noticeably by f/16, the smallest aperture on this lens. This doesn't mean I can't use it, after all not every image needs to be pin sharp across the frame. However, I don't find that stopping down to f/16 provides with with any special benefit so I tend to not use it.
Not disagreeing with what youve said, but it doesnt address my question of whether you found that the f/16 diffraction is any different comparing a 17/1.4 lens with a 17/3.8 lens (both at f/16).
Nov 3, 2022 01:07:51 #
Sunrisepano wrote:
I looked at the photo ephemeris, at the time the p... (show quote)
But the exif shows (assuming correct) that the images were shot at 3.27 pm?
Why would you wait a year to take a comparison? The light is hardly changes in a few days, surely?
Nov 3, 2022 03:40:48 #
So up to this point there are three things that need addressing or require clarification from the OP;
a) Was there an ND or Polariser filter fitted to the lens?
b) Has another lens been fitted to the camera, the camera set manually to sunny 16 exposure equivalent and a shot taken outside on a reasonably sunny day? If so, what was the result w.r.t. image brightness?
c) Is the clock in the camera correct, exif shows shots were taken 3.37pm 1st Nov 2022?
a) Was there an ND or Polariser filter fitted to the lens?
b) Has another lens been fitted to the camera, the camera set manually to sunny 16 exposure equivalent and a shot taken outside on a reasonably sunny day? If so, what was the result w.r.t. image brightness?
c) Is the clock in the camera correct, exif shows shots were taken 3.37pm 1st Nov 2022?
Nov 3, 2022 05:24:17 #
Sunrisepano wrote:
I looked at the photo ephemeris, at the time the photos were taken, the sun was about 28 degrees above the horizon. On july 1, that would be similar to taking the pics about 6PM.
They were all taken on November 1, 2022 at about 3:30PM, "Conditions: Bright, sunny, mostly clear sky."
At 28° above the horizon he sun is still quite bright.
My example was taken yesterday at about 4:30PM and the sun was even lower in the sky.
Nov 3, 2022 10:34:00 #
Sunrisepano wrote:
I looked at the photo ephemeris, at the time the p... (show quote)
These shots wete taken last Tue, Nov 1st, abbt 3:30 pm. You may have gotten these mixed up with some other photos.
Nov 3, 2022 10:48:27 #
I hope I have not misled anyone with my orig post. I shoot mostly in Aperture Priority, occasionally Manual, rarely in P or A. I was just playing around with the Sunny 16 Rule, and was somewhat surprised to find that it was greatly under-exposed at the true S16 (F16 / SS recip of ISO.) I have since tested all my Canon bodies, curtently three, and the three Holy Grail lens, all set to true S16, and they all come out vastly under-exposed, clear sky, bright sun. Further testing in order Isuppose, under clear sky and bright sun
Nov 3, 2022 11:07:40 #
DeanS wrote:
I hope I have not misled anyone with my orig post.... (show quote)
Did you use a different lens?
Nov 3, 2022 11:23:48 #
Grahame wrote:
But the exif shows (assuming correct) that the images were shot at 3.27 pm?
Why would you wait a year to take a comparison? The light is hardly changes in a few days, surely?
Why would you wait a year to take a comparison? The light is hardly changes in a few days, surely?
To see that 6PM (ish) during the summer is similar light intensity to 3:30PM (ish) in November. The light intensity at noon on July 1 is a LOT brighter than at 6PM on July 1. Your eyes may not detect this, but, the camera will. Or, get a light meter and measure it at various times of day. Hopefully those numbers will show you what is happening and why sunny 16 does not work 4 months later.
Nov 3, 2022 11:37:02 #
BebuLamar wrote:
Did you use a different lens?
Note my post just prior to yours.
Nov 3, 2022 11:41:19 #
Sunrisepano wrote:
To see that 6PM (ish) during the summer is similar light intensity to 3:30PM (ish) in November. The light intensity at noon on July 1 is a LOT brighter than at 6PM on July 1. Your eyes may not detect this, but, the camera will. Or, get a light meter and measure is at various times of day. Hopefully those numbers will show you what is happening and why sunny 16 does not work 4 months later.
I repeat, shots were taken this past Tue, Nov1st at abt 3.30pm.
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