D500 metering

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MYount

MYount

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I have had my d500 for 3 months. I use manual with auto ISO most of the time. I've noticed no matter what the conditions the iso is always extremely high. I did a test today because I wanted to see what was going on. Bright sunlight at a lake, light coming off the lake, and shooting a log that was in the lake. Lens was f 2.8 FL at 2.8. shutter was 1/4000 to the second. It was setting the iso at 1600. Pointing almost directly into the sun it wanted iso 800. I have never seen it go below 320. I see all these pictures all the time with people using the same camera in the same lens saw that ISO 100 or something like that but I can never shoot a shot at ISO 100 or it is underexposed no matter what. Any ideas?
 
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When you change from auto ISO back to the normal, manual ISO settings and change the ISO there, this is your new low ISO setting in auto ISO. Your camera doesn't go lower than this. Each time, before you go to auto ISO, please press the ISO button and check your ISO setting. Dial in ISO 100 before you change back to auto ISO by using the front wheel. I hope this solves yor problem.
 
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Tomorrow is supposed to be another sunny day so I'm going to spend a while with each one of my lenses and write myself down a record of how it does so that I have it for each photo I take and then see what I come up with.
 
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Firmware version? Polarizing filter?

It would be interesting to compare the resulting exposure reading using manual with auto ISO to fixed ISO and aperture and shutter priority readings.
 
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MYount said:
I have had my d500 for 3 months. I use manual with auto ISO most of the time. I've noticed no matter what the conditions the iso is always extremely high. I did a test today because I wanted to see what was going on. Bright sunlight at a lake, light coming off the lake, and shooting a log that was in the lake. Lens was f 2.8 FL at 2.8. shutter was 1/4000 to the second. It was setting the iso at 1600. Pointing almost directly into the sun it wanted iso 800. I have never seen it go below 320. I see all these pictures all the time with people using the same camera in the same lens saw that ISO 100 or something like that but I can never shoot a shot at ISO 100 or it is underexposed no matter what. Any ideas?
Click to expand...

Ok the big question here is are your pics overexposed, underexposed or well exposed?
If the latter happens to be the case all’s well, if not there’s a problem with either your camera or the lens or a combination.
 
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I can't remember if the D500's minimum shutter speed is impacted by the focal length of the lens, as I know that some of my bodies offer that feature. What FL lens wee you using, as I am wondering if it is biasing the ISO.

--Ken
 
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Replytoken said:
I can't remember if the D500's minimum shutter speed is impacted by the focal length of the lens, as I know that some of my bodies offer that feature. What FL lens wee you using, as I am wondering if it is biasing the ISO.

--Ken
Click to expand...

Good one Ken!
Auto ISO may be dialed in with a shutterspeed equaling the reciproque of the Focal lenght in use or plus 1 or plus 2 stops.
Might be indeed the issue here.
On the other hand the OP states he’s shooting full manual....
 
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Replytoken said:
I can't remember if the D500's minimum shutter speed is impacted by the focal length of the lens, as I know that some of my bodies offer that feature. What FL lens wee you using, as I am wondering if it is biasing the ISO.

--Ken
Click to expand...
With Program mode and I'm pretty sure Aperture priority it is impacted by focal length. Basically 1/focal length is the rule (takes "crop factor" into account. However, manual with auto ISO it does not, at least on my D500.

as for the opening post, next time try lowering the shutter speed the equivalent number of stops as between iso 100 and the iso the camera is recommending. I'd have to to my math in my head again but isn't it about 4 stops from 1600iso to 100 iso? So, all things being equal, if the shutter was lowered to 1/250 the camera's auto iso calculation should bring the iso down to 100? (OK, my math may be off but a better math wiz may be able to give better numbers but the theory behind it should be sound).

If lowering the shutter speed by an equal number of stops does not bring the auto ISO setting down to 100 then I would suspect the problem is in the metering or some setting we haven't identified yet.

Hope this helps.
Jeff
 
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I can't really see a big problem here. First of all: Why do you use 1/4.000? For not to small birds in flight, like doves, ducks, swans and herons, I normaly start with 1/1.250 and f 5,6 (full open). I use higher shutter speeds only for smaller song birds and fast swallows in flight. ISO 1.600 isn't very high for the D500. My auto ISO settings are normaly ISO 100 up to ISO 6.400. Grain mostly doesn't come from high ISO; it comes from low light. You wouldn't see much grain in bright light. I shot with 1/125 and auto ISO up to 20.000 during a concert and the result after postprocessing was excellent, because the spot was on the lead singer. When the guitarist was in shadow and the was at ISO 6.400, there was more grain. If it's grainy, use Topas DeNoise.

Topaz DeNoise: https://bcgforums.com/index.php?threads/topaz-denoise-ai.3897/

ISO 6.400: https://bcgforums.com/index.php?threads/a-wren-in-a-tree.3292/

Have a look to this website, wich explains the light value EV (in your case EV 11) and the combination from aperture, shutter sped and ISO: http://anderphotography.com/workshops/astrophoto/exposure.html

ISO 20.000
PSX_20201103_005751.jpg
You can only see EXIF info for this image if you are logged in.
 
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I was hoping not to have to factory reset it and it was just something that I set. That's okay though I just went through and got most everything set back up again and it's working.
 
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Steve Perry has a video of how to copy / back up your Camera Settings to a SD Card and then Copy to a Computer. Might be worth a look. I have completed this process on both my D500 and D850, you just never know when those custom settings can “get out in the weeds“ as they say.
 
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Snapshot2020 said:
Steve Perry has a video of how to copy / back up your Camera Settings to a SD Card and then Copy to a Computer. Might be worth a look. I have completed this process on both my D500 and D850, you just never know when those custom settings can “get out in the weeds“ as they say.
Click to expand...
Wouldn't that just copy back the "rogue setting"?
 
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