Canon R7 ISO?

dougan

dougan

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Dougie
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Had my first play in the garden with the R7 and my Sigma 150-600C lens, happy to report no focussing issues. Coming from a 70D, the focussing is something else!
One thing I did notice, with my normal settings and the amount of light, I would normally been on around 800 ISO to get a fast enough shutter speed on the 70D. To get the same speed on the R7, I was at 2000 ISO and even higher at times, which did seem a little odd.
 
Were your aperture and metering modes the same as you would use on the 70D too?
 
Yes, aperture priority and spot metering
 
I can't think of anything else obvious that it coud be. It could be a setting somewhere but I don't think so. The only other thing it could be is that the light is just darker, or the point your focusing on is darker.

I'd do this test ;-

Put the lens on the 70D, then focus on a spot in your garden, a rock, a leaf or something like that,

Do the same with the R7, making sure you focus on exactly the same spot, as you're using spot metering. Dial in exactly the same settings into the R7 as you have on the 70D.

Spot metering covers only a small percentage of the frame, I rarely use it, I tend to stick to Evaluative.

As you have the option of a histogram in the viewfinder on the R7, turn it on and focus on a spot. Then move the camera to another spot not far away, the histogram will change. This will demonstrate how small the area sampled by spot metering is.
 
Thanks for the suggestions, it was only something I thought I noticed, nothing scientific!!
Regarding the metering, as I am only taking birds, I presumed you used spot metering as you only want the bird to be exposed correctly. I fully take your point regarding how small an area that is though. Perhaps I will give evaluative metering a try
 
dougan said:
Thanks for the suggestions, it was only something I thought I noticed, nothing scientific!!
Regarding the metering, as I am only taking birds, I presumed you used spot metering as you only want the bird to be exposed correctly. I fully take your point regarding how small an area that is though. Perhaps I will give evaluative metering a try
Click to expand...
There’s no right or wrong metering mode (despite what some people believe). Every single metering mode requires the photographer to understand what the meter is measuring and how likely that is to not be 18% reflective, and by how much.

So; if you spot meter off a swan you’ll likely have it underexposed, and if you spot meter off a rook it’ll likely be overexposed. You probably guessed that might happen and therefore chose to use exp compensation.

There’s a dozen ways of doing this and getting the right result and a hundred ways of getting it wrong. But the key factor is never the metering mode, it’s a combination of mode and implementation.
 
And ISO is an international standard (literally), so whilst there might be small deviations camera to camera, it’s highly unlikely to be out be more than a stop.
 
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