Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-12-2009, 01:50 AM   #1
Pentaxian
LeDave's Avatar

Join Date: Jun 2009
Location: Minneapolis - St. Paul
Photos: Gallery
Posts: 2,898
Tamron 70-200 or Pentax 50-135 in sharpness

I know that these two are different lenses and that the 50-135 is quieter with SDM as well as being smaller and lighter. They also have different focal lengths too. But I am just comparing the sharpness just now, The Tamron 70-200 is a amazing lens that is sharper than both the Canon and Sigma 70-200/2.8's and almost as good as the Nikon version. But how does the sharpness go about both when in the same focal lengths. How's the Pentax 50-135 at 50mm wide open and compare that to the Tamron at 70mm wide open although they aren't at the same length? etc.

11-13-2009, 11:44 AM   #2
Pentaxian
LeDave's Avatar

Join Date: Jun 2009
Location: Minneapolis - St. Paul
Photos: Gallery
Posts: 2,898
Original Poster
Nobody? Strange, I don't see much people having the Tamron 70-200 so I guess that's why it's so quiet.
11-13-2009, 12:16 PM   #3
Veteran Member




Join Date: Jan 2008
Location: Southern California, USA
Photos: Gallery
Posts: 730
I don't think many people here owned both lenses.
You might want to ask Pentax people at DP Review.
There are some people there who own overlapping lenses.

Sorry, I don't have Tamron 70-200 to compare either.
11-13-2009, 01:04 PM   #4
Ash
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,687
Photozone has data for the 50-135, but not the Tamron 70-200.
DPreview has data for the 70-200, but not the 50-135.
Results there just can't be compared, but remember there's more to a lens than sharpness.

The only other thing I can offer is this little unscientific look at the 70-200s performance wide open:
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/69207-request-...0-f-2-8-a.html

11-13-2009, 01:17 PM   #5
Pentaxian
LeDave's Avatar

Join Date: Jun 2009
Location: Minneapolis - St. Paul
Photos: Gallery
Posts: 2,898
Original Poster
I found this one just yesterday and it shows that the Tamron is sharper than all 70-200 except for the Nikon version here, Juza Nature Photography
11-13-2009, 09:41 PM   #6
Veteran Member
jsherman999's Avatar

Join Date: Dec 2007
Photos: Gallery
Posts: 8,228
Dave, here's a link where I compare the two a bit:

link
11-15-2009, 11:39 AM   #7
axl
Veteran Member




Join Date: Mar 2007
Location: Nove Zamky, Slovakia
Photos: Gallery | Albums
Posts: 7,181
I used to own both, but the Tamron broke down, and I sold the DA*.
Comparing those 2...
DA*: smaller, lighter, quieter, weather sealed, BUT: with longer minimal focusing distance, more vignetting (IMO).
Sharpness was great on both, I'd say you would have to pixelpeep hard to see important difference. And Tamron didn't have as warm rendering as DA*.
All in all both were great, but bit different lenses

BR
Peter
11-15-2009, 11:58 AM   #8
Pentaxian
LeDave's Avatar

Join Date: Jun 2009
Location: Minneapolis - St. Paul
Photos: Gallery
Posts: 2,898
Original Poster
How did your Tamron broke down?

11-15-2009, 03:58 PM   #9
axl
Veteran Member




Join Date: Mar 2007
Location: Nove Zamky, Slovakia
Photos: Gallery | Albums
Posts: 7,181
Aperture was sticky. Lens kept shooting @f2.8 until I dismounted it, flicked the aperture lever and than it was ok.... for maybe 10 or 100 pics, there was no way of knowing.
Many people reported this problem with the early samples of this lens. Other than that (and some decentered samples) this is opticaly fantastic lens!

Peter
11-15-2009, 04:04 PM   #10
Ash
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,687
Not just early samples Peter.
I bought two copies from B&H very recently, both being defective in this way and both needing to be returned. I've not given up on the lens because of its optical prowess, but I'm waiting for a copy to come back to me repaired...
11-15-2009, 04:48 PM   #11
axl
Veteran Member




Join Date: Mar 2007
Location: Nove Zamky, Slovakia
Photos: Gallery | Albums
Posts: 7,181
QuoteOriginally posted by Ash Quote
Not just early samples Peter.
I bought two copies from B&H very recently, both being defective in this way and both needing to be returned. I've not given up on the lens because of its optical prowess, but I'm waiting for a copy to come back to me repaired...
I hope it's going to be 3rd time the lucky for you.
I gave up after 1st faulty sample. The lens is great but not one for me

Peter
11-15-2009, 09:32 PM   #12
Pentaxian
raider's Avatar

Join Date: Jul 2007
Location: Perth, Australia
Photos: Gallery
Posts: 1,931
I have the Tamron 70-200. I find the lens quite sharp (if hand holding technique is right) and AF relatively fast (sometimes it will still hunt if focus on a less contrasty object). It is quite a big lens and with the lens hood on, I think people will think you are holding a bazooka. Certainly not the lens I will bring with me on a vacation.
11-15-2009, 09:53 PM   #13
Senior Member




Join Date: Aug 2007
Location: Perth, Australia
Posts: 268
My Tamron also developed sticky aperture in less than 1 yr. Recently repaired under warranty, and its now good. Hopefully it will remain good that way.

For sharpnesss, both lenses are pretty much the same to me anyway (I have both). Tamron seems to focus and lock focus faster. At the wide end side, I prefer 50mm more, as I can use it in a tighter in door situation.
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!
k-mount, lengths, pentax, pentax lens, sharpness, slr lens, tamron
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax 55- 135 f2.8 Vs. Tamron 70 -200 f2.8 mikejustice Pentax SLR Lens Discussion 13 08-23-2009 09:27 AM
Pentax 50-135 or Tamron 70-200 f2.8 RonMexico Pentax SLR Lens Discussion 18 01-21-2009 02:45 AM
Tamron/Sigma 70-200 or Pentax 50-135? Clem Nichols Pentax SLR Lens Discussion 6 09-26-2008 07:07 PM



All times are GMT -7. The time now is 03:16 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