Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
08-16-2013, 09:12 AM   #1
New Member

Join Date: Aug 2013
Posts: 1
Universal lens for a K100d


My knowledge about Pentax cameras is pretty much non-existent as I'm a Canon person myselt (sorry, please don't kick me off the forum ) but I promised I would help my Grandfather find a good new lens for his camera. He has been using the kit 18-55 (which in my opinion is awfully loud - is that normal?) and is now looking to buy a telephoto, however, in my opinion a good universal lens would make more sense. He just shoots for his own enjoyment and although universal lenses have their drawbacks in terms of image quality compared to designated telephoto lenses, I still think that the convenience of not having to switch lenses outweighs the negatives.
I found the Sigma 18-250 has been recommended quite a lot and I even found one that almost matches our price range but further reading brought up the issue of AF. If I understand correctly the AF of the lens does not work with the K100d? If this is the case could you please recommend any other decent lenses with a wide angle between 18 and 25 and the longer end in the 200-300 range that would work with the K100d?

Any help would be much appreciated!

08-16-2013, 11:49 AM   #2
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,898
Lenses with a (noisy) screw drive will work with the K100D. However, Sigma's HSM or Pentax's SDM or other "silent" motor-focusing lenses will not AF.
08-16-2013, 12:00 PM   #3
paulh's Avatar

Join Date: Sep 2010
Location: DFW Texas
Photos: Gallery | Albums
Posts: 13,843
The Tamron/Pentax 18-250 is considered a good superzoom, and uses regular screw-drive, so it will work with the K100D. The K100D Super *can* be used with SDM-type AF lenses.
08-16-2013, 12:31 PM   #4
Veteran Member
carrrlangas's Avatar

Join Date: Mar 2012
Location: Joensuu (Finland)
Photos: Gallery
Posts: 1,748
I think there´s nothing wrong with the kit lens. I would buy him a used DA55-300. Great lens at a great price

08-16-2013, 02:28 PM   #5
Site Supporter
rbefly's Avatar

Join Date: Oct 2009
Location: Denver, Colorado
Photos: Albums
Posts: 2,030
Two Is Better Than One?

Hello Mica, Welcome to the Forum!
I'm in agreement with carriangas, the Pentax DA 55-300mm seems like a better fit, for a few reasons.
One, your Grandfather wants a tele, not a superzoom. He has a decent kit wide-to-normal. I understand your feelings on the matter, but changing between 2 lenses isn't that big of a deal, and there may be some pride involved on his part if you make a different decision.
Two, the Sigma 18-250mm is an f/3.5-6.3 and sells for about $500.
The Pentax 55-300mm is f/4.0-5.8 and sells for $350-400, so it's less expensive, 50mm longer and faster at the long end.
FWIW, the ratings here are virtually identical, the Sigma is 8.67 and the Pentax is 8.64.
Good luck either way!
08-16-2013, 02:43 PM   #6
audiobomber's Avatar

Join Date: May 2008
Location: Sudbury, Ontario
Photos: Albums
Posts: 6,684
The DA 55-300mm beats any superzoom for telephoto use.
08-16-2013, 03:18 PM   #7
hcc's Avatar

Join Date: Nov 2009
Location: Brisbane, Australia
Photos: Gallery | Albums
Posts: 3,531
QuoteOriginally posted by paulh Quote
The Tamron/Pentax 18-250 is considered a good superzoom, and uses regular screw-drive, so it will work with the K100D.
The Tamron 18-250mm/Pentax DA18-250mm is an excellent choice, a good all-arouns lens well regarded across all brands incl. Canikon. Like all all-around lenses, the DA18-250mm is a compromise and its IQ is not comparable to a good prime lens. But the DA18-250mm is a very decent lens, well-liked among Pentaxians. It can be strongly recommended.

The Tamron/Pentax 18-250 is no longer manufactured but it can be found regularly on the second-hand market: eg, PF marketplace, Adorama used, The Tamron tends to be slightly cheaper and the IQ is basically identical to that of the DA18-250mm.

Hope that the comment may help.

  • 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!
af, help, k-mount, k100d, lens, lenses, opinion, pentax lens, range, slr lens, telephoto
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Universal pop up shade for the Q? explorette Pentax Compact Cameras 2 07-04-2013 11:09 AM
Anyone discovered a Universal Sharpen Setting for k-x and Photoshop? hockmasm Digital Processing, Software, and Printing 15 05-21-2010 07:50 AM
Standard zoom lens for a K100d tjmckay Pentax SLR Lens Discussion 7 12-31-2008 04:37 PM
Please help me choose a new lens for my K100D missnewzealand Pentax DSLR Discussion 13 01-14-2008 07:52 PM
A free universal browser for OSX that will reaad .PEF? wmmk Photographic Technique 9 12-24-2006 05:22 PM

All times are GMT -7. The time now is 01:43 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]