2 Nikons, same settings = different exposures.?

Yardbent

Yardbent

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John
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quick before work...not sunny so best i can do

Nikon D5000...1/320 f5.6 WB = cloudy EV=0 and ISO 200 in each shot

kit lens 18-55 AF-S VR
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consumer grade 55-200 AF-S VR
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the 18-55 is darker......:thinking:

and takes EV= +0.7 to equal the 55-200 lens ...something wrong..?

thanks
 
Thats a bit odd, its not a lot but the 18-55mm is just a touch darker..... If you use lightroom it would be interesting to see the histogram on each shot
 
ironicall said:
Thats a bit odd, its not a lot but the 18-55mm is just a touch darker..... If you use lightroom it would be interesting to see the histogram on each shot
Click to expand...

actually on some shots i think it is more than a touch.....:shake:

couldn't find 2 with identical settings, so just banged off these 2

have PS Elements but out now - but the in-camera histogram shows all the pixels mostly bunched to the left on the 18-55

will put some more examples later
 
The bushes in the background could be a clue as to what's going on.

In the first image the bushes seem to be more in focus than in the second. This could suggest that the effective aperture was wider in the second shot, and for a given shutter speed this would make the image lighter.

Using two different lenses with two different optical designs at the same settings has IME occasionally produced slightly different exposures. But only really noticeable when the exact same shot is taken side by side.

I've also seen both my D90 and D40x do a similar thing when continuous shooting - all of a sudden there'll be an image that's just slightly lighter than the others, however when I've checked the EXIF it gives exactly the same settings as the other shots. It doesn't happen often at all, and I put it down to the occasional timing glitch where the aperture is not at the required postion before the shutter activates, but that's just a guess on my part.
 
Agreed - just the quality of the individual lens coatings can make a big difference to the ability of the lens to transmit light as well as to render contrast and colour saturation.

I wouldn't lose any sleep over it John.
 
Slaphead said:
The bushes in the background could be a clue as to what's going on.

In the first image the bushes seem to be more in focus than in the second. This could suggest that the effective aperture was wider in the second shot, and for a given shutter speed this would make the image lighter......
Click to expand...

well spotted
had a read through ALL the exif data, and noticed this

AFAperture........18-55 = 5.8 and the 55-200 = 4.1

i dont know what AFAperture 'is' but it ties in with your comment...thanks..D
 
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sparkoss said:
i read about this before, it's interesting and pretty normal. just enjoy taking photos! :)
Click to expand...

CT said:
Agreed - just the quality of the individual lens coatings can make a big difference to the ability of the lens to transmit light as well as to render contrast and colour saturation.
I wouldn't lose any sleep over it John.
Click to expand...

thanks...howeverrrrrrrrr

if you took this..with typical User Settings
AV mode, f5.6, 1/1000, EV Bias = 0, Matrix metering, WB=auto, Picture Control = Standard
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wouldn't you wonder why it's dark..?

Now Uncle Ken says to dial in EV= -0.3 for colour
to get this image up to the exposure of the 55-200 VR I'm going to have to ADD EV= +0.3 or even +07

ok it's just a [jump to the right] sorry..:D.... 'turn of the thumbwheel'..but..:thinking:
 
ok
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how's this

for any newcomers reading this thread ...see WHAT a difference the correct WB can be ..this is WB=cloudy and warms up the cold blue tint [the car is silver]
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EV=+1/3 ........... centre weighted.............. meter WB = cloudy
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936818b8.jpg
 
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