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03-26-2017, 03:51 AM   #31
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Thanks again for posting all your tests ian. I have been following Brad's blog/review with keen interest. The Sigma 500 f4 Sport is on my list for Santa.
For amateurs like me, and perhaps cost conscious "Pros", the argument for the new Sigma lenses is beyond compelling.

04-20-2017, 09:51 PM   #32
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Had some time this week to shoot some BIF with the 150-600



These are consecutive shots taken in 1.2 crop mode. It really only missed focus on the 6 frame

shot in overcast light
04-21-2017, 02:32 PM   #33
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Very creative shooting
03-22-2020, 09:24 PM - 1 Like   #34
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I just got done profiling the sigma 150-600 and with the 1.4 converter for use on the D810, for the first time out shooting some moving targets I do see an improvement in some areas.

The first would be with the D800 about ever 50 frame when first going to acquire AF lock there could be a stutter but with the D810 it is mostly gone.

I also notice is that it is much faster when tracking, so much so that when panning as a car is going by it would try and lock onto the object that even when its passing by in the frame at less than 1/10 sec it would focus on it.
With the D800 and this lens there was not much need to use AF hold for this kind of situations, but with the D810 I need to set the AF hold as it on a very regular basis shifted focus


Here we are tracking normally

here shifts focus

and again

With the addition to group AF points there is a much added benefit at the lens and camera can track much better than I have experienced with the D800, this is mainly at the very close distance where I would see the camera tracking much better with very little times that the camera would lose lock.

Here is start to finish all the shots taken when everything was setup
https://isfphotography.smugmug.com/frame/slideshow?key=JQMBcf&autoStart=1&ca...25&clickable=1
slide show

All the shots of the day
Work - isfphotography


Last edited by Ian Stuart Forsyth; 03-22-2020 at 10:34 PM.
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