Nikon AF-S 85mm f/1.4 lens not so hot.

Started May 22, 2013 | Discussions thread
MisterHairy
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In reply to MisterHairy, May 23, 2013

Before I start to prepare our evening meal, I have snapped off a few test shots. However, before I show them (not that there is much point, as the single attached image will show) I have noticed something interesting.

The 1.8 lens is consistently giving me shorter exposure times, by 1/3 of a stop or so for the same aperture setting as the 1.4 lens when shot in A mode. This is at every aperture, and while my test shots were conducted outside, I see the same indoors under more controlled lighting as well. In addition to this, the 1.4 lens appears to be giving me slightly more DOF than the 1.8 lens at the same nominal aperture, which makes me think that the camera (D800E) is stopping the 1.4 lens down too far, since I think (can't be arsed to check now) that the 1.4 lens is supposed to be faster in T-stop terms than the 1.8 at the same aperture. If anybody knows otherwise, I'd be grateful for the information.

In any case, this is a screengrab of Lightroom with the two f/2 images open in Compare. Images were imported using the "Default" setting with the default sharpening of 25/1.0/25/0 in both cases. No subsequent manipulation has been done in either case. Tripod, liveview focusing on the nose and 3s exposure delay. A mode. This is the image centre in each case.

The 1.8 lens is sharper at the point of focus, but it's not a slaying, I have to confess, which means that I shall revisit the model shots from yesterday and work out what the differences were.

 MisterHairy's gear list:MisterHairy's gear list
Nikon D700 Nikon Df Nikon D810 Nikon AF-S Nikkor 70-200mm f/2.8G ED VR II Nikon AF-S Nikkor 24mm f/1.4G ED +14 more
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