Go to a  "printer friendly" view of this message which allow an easy print Printer-friendly copy Go to the page which allows you to send this topic link and a message to a friend Email this topic to a friend
Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon D5300/D5200/D5100/D5000/D3300/D3200/D3100/D3000 (Public) topic #6301
View in linear mode

Subject: "D5100 + Nikon AF-S 35/1.8G autofocus problems" Previous topic | Next topic
Kuripakk Registered since 30th Jun 2012Sat 30-Jun-12 08:49 PM
2 posts Share on Facebook Share on Twitter Share on Linkedin    Click to send email to this author Click to send private message to this authorClick to view this author's profile
"D5100 + Nikon AF-S 35/1.8G autofocus problems"


SE
          

Hello,

I've had my D5100 for a few months and recently purchased the Nikon AF-S DX 35/1.8G lens for it, however I'm having some real problems with the autofocus. I took it with me on a trip without testing it out much beforehand and it probably ruined a few dozen good shots before I realised that it did not reliably autofocus using the viewfinder, only when using the LCD. Even when using single-point autofocus without recomposing the shot it was consistently off, usually with the focus ending up on the hair near the back of the subject's head instead of the eyes and face. Had to make do with the LCD for the rest of the trip which was often a pain due to the slow AF, battery use and glare in sunny weather.

Here is a test I did with it at f1.8, subject distance just over 1m, focusing on the number '2016' near the barcode on the side of the box.

This first image was using the viewfinder, single-point AF:
http://postimage.org/image/hxmped8qd
As you can see the focus seems to be somewhere around the end of the barcode some 4cm further away.

In this second image I just switched on the LCD and refocused on the same spot:
http://postimage.org/image/mxk5mbed1
Focus is much better.

What is the problem here, is the camera faulty, or is it a bad lens? Or are the results expected due to the shallow depth of field? I tried to do some further testing at higher f-numbers and comparing to the 18-55 kit lens and I think it still doesn't focus correctly but it's much harder to see without the shallow depth of field.

Thanks.

  

Alert Printer-friendly copy | Reply | Reply with quote

A topic tagged as in need of helpD5100 + Nikon AF-S 35/1.8G autofocus problems [View all] , Kuripakk , Sat 30-Jun-12 08:49 PM
 
Subject Author Message Date ID
Reply message RE: D5100 + Nikon AF-S 35/1.8G autofocus problems
pjonesCET Gold Member
01st Jul 2012
1
Reply message RE: D5100 + Nikon AF-S 35/1.8G autofocus problems
Lolrogge Silver Member
02nd Jul 2012
2
Reply message RE: D5100 + Nikon AF-S 35/1.8G autofocus problems
Kuripakk
02nd Jul 2012
3
     Reply message RE: D5100 + Nikon AF-S 35/1.8G autofocus problems
MEMcD Moderator
02nd Jul 2012
4

Forums Lobby GET TO KNOW YOUR CAMERA & MASTER IT Nikon D5300/D5200/D5100/D5000/D3300/D3200/D3100/D3000 (Public) topic #6301 Previous topic | Next topic


Take the Nikonians Tour and learn more about being a Nikonian Wiki /FAQ /Help Listen to our MP3 photography radio channels Find anything on Nikon and imaging technology - fast!

Copyright © Nikonians 2000, 2014
All Rights Reserved

Nikonians®, NikoScope® and NikoniansAcademy™ are trademarks owned by Nikonians.org.
Nikon®, Nikonos® and Nikkor® are registered trademarks of Nikon Corporation.