Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
12-30-2010, 07:32 AM   #1
New Member

Join Date: Dec 2010
Location: McHenry, IL
Posts: 6
Zoom Lens for K7

I am stuck in trying to choose a zoom for my k7. It is between:

Pentax 55-300 f/4-5.8 ED
Sigma 70-300 f/4-5.6 APO DG Macro Autofocus
Sigma 70-300 f/4-5.6 DG OS Telephoto Zoom

PLease explain your choice. Will the sigma with the Macro be as sharp at 300 as the others? My other lens is Pentax 18-55. Thank you

12-30-2010, 08:08 AM   #2
Forum Member
Bobe416's Avatar

Join Date: Mar 2009
Location: Toronto
Photos: Gallery | Albums
Posts: 57
I am not a fan of most zoom lenses, but I would suggest you take a look at the lens review section of Pentax Forums Pentax Reviews - Pentax Lens Reviews & Pentax Lens Database
as well as Pentax K / Samsung NX Lens Tests
12-30-2010, 09:26 AM   #3

Join Date: Feb 2010
Location: Eureka, CA
Photos: Gallery | Albums
Posts: 1,977
If I had to choose between those three lenses, I would pick the DA 55-300mm. It's generally regarded as best lens in its class (at least among what is available in the K-mount).

Of course, I would not buy any of those lenses if I was mostly looking to shoot at 300mm. None of them will perform particularly well at the focal length.
12-30-2010, 11:07 AM   #4
Veteran Member

Join Date: Oct 2008
Location: Frisco Texas
Photos: Gallery
Posts: 382
There are lots of threads comparing the Sigma and Tamron 70-300mm lens to the Pentax 55-300mm. The Pentax is considered the better lens. I used to own a Tamron 70-300mm and replaced it with the Pentax. I like the Pentax better.

12-30-2010, 08:17 PM   #5
hcc's Avatar

Join Date: Nov 2009
Location: Brisbane, Australia
Photos: Gallery | Albums
Posts: 3,531
I may recommend that you expand your interest to the DA18-250mm/Tamron 18-250mm. This all-around lens is a great lens among all the brands, Cainkon, Oly and Sony included. It covers a very broad range of focal lenghts. Its flexibility is legendary and it is the best travel lens.

The 18-250mm is well adapted to the zoo. In addition, it will reduce your system to one body and one lens. While the 18-250mm is not a macro lens, it can be used for some macro shots with some success.

The only downside is the DA18-250mm is no longer manufactured. But its sibbling (Tamron 18-250mm L-mount) is still available, while some 2nd hand DA18-250mm/Tamron 18-250mm are available regularly in second hand shops and retailers, as well as in the Forum market place.

Hope that the comment will help... and Happy New Year.

  • 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!
camera, dg, dslr, f/4-5.6, k7, lens, macro, pentax, photography, sigma
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
What is a good aperture rating for a zoom lens (or any lens)? justtakingpics Pentax SLR Lens Discussion 7 04-09-2011 06:32 PM
Is there something that can make my lens into a zoom lens? CrossStealth Troubleshooting and Beginner Help 15 02-14-2010 01:26 PM
For Sale - Sold: Pentax k-2000 + kit lens (18-55) + sigma zoom lens 70-300mm dexmus Sold Items 6 11-09-2009 05:25 PM
Is the Pentax - 75-300mm F4.5-5.8 SMCP-FA J AL Zoom Lens a good budget zoom? Kornbread Pentax SLR Lens Discussion 7 01-16-2009 03:45 PM
For Sale - Sold: Unusual Lens: Pentax M 40-80mm f2.8-4 Zoom Lens Youngster Sold Items 2 12-09-2008 07:17 PM

All times are GMT -7. The time now is 06:12 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]