help circle visible in viewfinder nikon D5100

I bought a new Nikon D5100, and have a minor query about the viewfinder. When looking through the viewfinder, I can see a very faint clear circle at the centre of the view (around the central AF square). It is around four times the width of the central AF square.it is small, It is more visible against a light background, and does not affect the picture (its not in the sensor, no dust). I have taken the lens off, and looked through the viewfinder without the lens and I can still see this circle (on what I assume is the focusing screen?).Is it normal? the circle is in the center, without the fresnel pattern of the screen that i see with the lens off and looked through viewfinder

Help please...

   

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Comments

Total comments: 4
nsiran
By nsiran (Jul 14, 2012)

Hi, thanks for the question edgardlogo. I have a new D5100 too and had the same concern. However my concern is not just the circle, but the central focal point of the grid does not coincide with the center of the circle, it's in fact on the far top left within the circle. I want to get this checked with Nikon's service guys, but before that would like to hear from the experts on this forum if this really is a cause for concern. [Note:there's been no problem with IQ or any other issues whatsoever due to this]

1 upvote
edgardlogo
By edgardlogo (Feb 12, 2012)

thanks for your answer...

0 upvotes
Nevermess
By Nevermess (Jan 9, 2012)

I have Nikon D5100 and I can see the same circle in the centre. It is not an issue and it is visible on all Nikon D5100. As well as Matrix metering, the Nikon D5100 provides center weighted (75% weight for circle) and spot modes. The center-weighted circle defaults to 8mm. The spot metering circle is 3.5mm, or about 2.5% of the image frame, and meters at the center of the frame when the focus point is automatically selected, or from the manually selected focus point otherwise. On the highest models you have option to chose the circle size, but here it is with fixed size and visible through the viewfinder.

0 upvotes
edgardlogo
By edgardlogo (Jan 6, 2012)

my problem is exactly like the pictures....

1 upvote
Total comments: 4