Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
12-22-2013, 09:06 AM   #1
Veteran Member
Michael Piziak's Avatar

Join Date: Dec 2013
Location: West Virginia
Posts: 1,413
What's sweetspot of DAL 18-55mm kit lens?

IWhat's sweetspot of DAL 18-55mm kit lens?
Is it around f5.6 ?

12-22-2013, 09:18 AM   #2
Veteran Member
causey's Avatar

Join Date: Feb 2009
Location: Arlington, VA
Photos: Albums
Posts: 3,758
My copy is sharpest at f7.1.
12-22-2013, 09:49 AM   #3
Inactive Account

Join Date: Jul 2012
Posts: 41
On mine the lens is sharper towards the wide (18mm) and at that focal range F8 gives sharpest centers and F5.6 for edge to edge
12-22-2013, 04:46 PM   #4
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 4,862
I try to use it at least one stop from wide open, so f4.5 at 18mm to f8 at 55mm. The range from about 24mm to 40mm is pretty good.

In low light, I try to ignore the sweet spot entirely. It's better to shoot wide open at 1/30 than hope that shake or motion is OK at 1/15.

A fast 50 is very handy to supplement the kit lens, because the kit is so slow at the long end and starts to fall off in IQ. Even an A50/2 is 3 stops faster and nearly pancake in size.

12-23-2013, 09:25 PM   #5
Site Supporter
6BQ5's Avatar

Join Date: Jun 2013
Location: Nevada, USA
Photos: Albums
Posts: 3,109
f/5.6? No way... I would say the range started at f/6.3 and would start tapering down at f/11. At f/16 you might as well shake the camera as hard as you can while you fire the shutter.
12-23-2013, 09:43 PM   #6
Veteran Member
Michael Piziak's Avatar

Join Date: Dec 2013
Location: West Virginia
Posts: 1,413
Original Poster
Thanks to all that replied.
12-23-2013, 09:56 PM   #7
twitch's Avatar

Join Date: Nov 2009
Posts: 4,571
F/8 Pentax SMC DA 18-55mm f/3.5-5.6 AL WR - Lab Test / Review - Analysis
12-23-2013, 11:55 PM   #8

Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,002
They did switch the optical formula for the 18-55 kit at one point (when then became "II") -- they are a bit different.

12-24-2013, 02:03 PM   #9
Inactive Account

Join Date: Jul 2012
Posts: 41

Yes there are 2 versions, 1st version; 12 elements in 9 groups ,, 2nd version; 11 elements in 8 groups,

Here's a review that more closely resembles my experience with the 2nd version lens(DAL has same formula), sharpest at 18mm F8 for center sharpness and F5.6 for edge to edge sharpness. Always keep in mind there's alot of sample to sample variation and your copy may not have the same results. It would be best if you test your lens yourself and see where the 'sweet spot is'.

Last edited by Slice Of Light; 12-24-2013 at 02:08 PM. Reason: system glich

  • 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!
18-55mm, 18-55mm kit, k-mount, kit, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax K-X Camera with Lens Kit DAL 18-55mm F3.5-5.6 AL (price reduction mekitties Sold Items 2 05-05-2013 04:51 PM
For Sale - Sold: Price Reduced: Pentax K-r with 18-55mm DAL kit lense nzbk10 Sold Items 3 04-14-2013 09:36 AM
For Sale - Sold: Pentax DAL 18-55mm Kit lens (US) PastorOfMuppets Sold Items 6 04-11-2011 09:27 AM
Which has better IQ? Pentax/Tamron 18-250mm or the kit lens DAL 18-55mm rustynail925 Pentax SLR Lens Discussion 4 02-07-2010 12:20 AM
DA 18-55mm AL II vs DAL 18-55mm (kit lens) vs DA 18-55mm WR rustynail925 Pentax SLR Lens Discussion 10 01-08-2010 02:06 PM

All times are GMT -7. The time now is 05:28 AM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]