Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-27-2016, 09:45 AM   #1
Site Supporter
Site Supporter
Robin's Avatar

Join Date: Mar 2016
Location: Pietermaritzburg
Photos: Gallery
Posts: 432
Lens focusing on the K3

Hi There. I have a Sigma DG 120-400mm 1:4.5-5.6 APO HSM. Photos taken with this lens are never perfectly sharp, even off a heavy tripod. I have tried to set the individual focus for this lens, to +10 or -10 seems to make no appreciable difference. Am I doing something wrong, or am I expecting too much from a mediocre lens?

03-27-2016, 10:24 AM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 51,584
Try focusing in live view, then magnify the image prior to capture and manually adjust the focus, if needed. That should eliminate any focusing errors and allow you to evaluate the performance of the lens itself.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
dslr, k-3, k3, lens, pentax k-3
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
What lens look the best on your K5, K3, K2 etc. hjoseph7 Pentax SLR Lens Discussion 14 12-29-2015 08:41 PM
PP mount lens on K3 igabc Pentax SLR Lens Discussion 6 03-17-2015 12:44 PM
Newbie to K3 question on manual lens focusing mikeodial Pentax K-3 & K-3 II 3 08-19-2014 05:19 PM
M lens on K3 - any problems? teoprome Pentax SLR Lens Discussion 26 06-13-2014 07:34 PM
Problem w/Nikon K3 focusing screen on K30 gmiyamoto Troubleshooting and Beginner Help 24 04-17-2014 05:49 PM



All times are GMT -7. The time now is 04:21 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top