Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-31-2010, 02:42 PM   #1
Senior Member




Join Date: May 2010
Location: long island
Posts: 135
tamron 90mm f2.8 lens

hi, guys, i am interested in buying this lens.

one question is that what i can do with it except for potraits and macro? can i possibly use it to capture things that are very far away? thank you very much for any input!

05-31-2010, 02:44 PM   #2
Ira
Inactive Account




Join Date: Mar 2009
Location: Coral Springs, FL
Photos: Gallery | Albums
Posts: 5,216
It's a wonderful all-purpose lens. I have one.
05-31-2010, 02:52 PM   #3
Forum Member




Join Date: Feb 2009
Location: Wilmington, OH
Posts: 60
I've had it before for another mount (Minotla) and it was my go-to lens for macro and portrait. Loved it then (and looking for one now). It even did ok with a 2x TC to go to 180mm (then to 270mm with the APS-C factor)
05-31-2010, 03:10 PM   #4
Forum Member
d3zzzz's Avatar

Join Date: May 2010
Location: Melbourne
Posts: 51
Great lens. Really, really sharp. You won't be disappointed.

05-31-2010, 03:47 PM   #5
Senior Member
DaniRo's Avatar

Join Date: Apr 2010
Location: Romania
Posts: 102
QuoteOriginally posted by shang Quote
... can i possibly use it to capture things that are very far away?...
very far away is a long shot , this is relative

it's a great lens, unless you whant to shot small birds with it or things that are really, really far away





05-31-2010, 03:58 PM   #6
Senior Member




Join Date: May 2010
Location: long island
Posts: 135
Original Poster
wow! thank you guys! Dani, ur pics are amazing!

a dumb question, the lens is for FF cameras? so 90mm equals around 135mm? am i right? so that means it's actually the same as a 135mm focal length lens on a K-7? thanks a lot!
05-31-2010, 04:04 PM   #7
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,484
QuoteOriginally posted by shang Quote
wow! thank you guys! Dani, ur pics are amazing!

a dumb question, the lens is for FF cameras? so 90mm equals around 135mm? am i right? so that means it's actually the same as a 135mm focal length lens on a K-7? thanks a lot!
It's still a 90mm lens but gives you the same View as a 135mm. But you understood that right? As others have stated, you won't be disappointed with it. My only disappointment with mine is that I sold it years ago.

05-31-2010, 04:10 PM   #8
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
QuoteOriginally posted by shang Quote
a dumb question, the lens is for FF cameras? so 90mm equals around 135mm? am i right?
No. Whether or not the lens happens to work with FF cameras has *nothing* to do with it. All 90mm lenses produce exactly the same field of view on a K-7. It happens to be the same field of view that a 135mm lens would produce on a FF camera, biut that's of interest only if you happen to have extensive experience with FF cameras and know exactly what a 135mm field of view looks like. if not, you can completely forget you ever heard about crop factors. Whether the 90mm lens you mount to your K7 is made for FF or not doesn't change *anything*. Again, all 90mm lens have the same FOV on your K7, and the notion of a crop factor doesn't come into play unless you are comparing your K-7 to an FF camera.

If you have a zoom lens that cover 90mm, set it there, and what you see through the viewfinder will be exactly what the Tamon 90 will produce on the same camera.

05-31-2010, 05:55 PM   #9
Site Supporter
Clinton's Avatar

Join Date: Feb 2010
Location: Salt Lake City, UT
Photos: Gallery | Albums
Posts: 1,826
It's a great lens. My only optical complaint with it is a little bit of purple fringing in bright light.

If I was buying this lens now, it would be a hard call between this and the WR 100mm pentax macro.

As far as usability, I do have some complaints. When you switch this into MF mode, you have to switch the camera over to MF as well, or it will still be engaged to the screw drive on the camera; so it's not quick shift like most of my lenses.

This lens extends out the front, way way out the front, and I expect it will collect dust on account of it.

The AF on the lens seems to be a bit overzealous in jumping between different points of focus. Sometimes I do have to play with it a bit to get it to focus on the item I'm interested in. I don't have another macro lens, so I don't know if this is just a side effect.

Still I picked mine up used cheap, it was my first experience with F2.8 glass, and overall I'm very happy with it.

Last edited by Clinton; 05-31-2010 at 06:07 PM.
05-31-2010, 05:57 PM   #10
Site Supporter
Clinton's Avatar

Join Date: Feb 2010
Location: Salt Lake City, UT
Photos: Gallery | Albums
Posts: 1,826
The photozone.de site gives this lens a high review as well:

Tamron AF 90mm f/2.8 Di SP macro (Pentax) - Review / Lab Test Report
05-31-2010, 10:15 PM   #11
Senior Member




Join Date: May 2010
Location: long island
Posts: 135
Original Poster
thank you very much for all the inputs, guys!

my goal was to find a long focal length lens to use together with da 17--70. i believe this is a good choice and so are the sigma 105mm and pentax 100mm.
06-01-2010, 03:39 PM   #12
Ira
Inactive Account




Join Date: Mar 2009
Location: Coral Springs, FL
Photos: Gallery | Albums
Posts: 5,216
I've mostly used mine in manual focus, and as said above, it does have a tendency to hunt for focus, even with the limiter properly engaged. However, this only happens on your first shot in a series.

I'm also not a huge fan of the push/pull, manual/autofocus operation on the barrel of the lens, because it's easy for this to unintentionally change just putting in and removing from your bag.

However, this is a minor inconvenience compared to what the lens can do. As long as you check the settings before pulling the trigger, you're cool .

However again, others here like the push/pull function.
06-01-2010, 05:16 PM   #13
Veteran Member
geauxpez's Avatar

Join Date: Jul 2008
Location: Atlanta
Photos: Gallery
Posts: 1,197
I can take or leave the push-pull function. The lens is brilliant.

I'm a dog person, but since someone took care of that already...

ISO: 400 f2.8 1/8 sec handheld...
06-02-2010, 02:33 AM   #14
Junior Member




Join Date: Oct 2007
Location: Vedum, Sweden
Photos: Gallery
Posts: 36
As others has stated, you won't be disappointed. It's a very sharp lens and lovley for macro shoots
06-02-2010, 04:32 AM   #15
Loyal Site Supporter




Join Date: Sep 2006
Location: Bronx NY
Photos: Gallery | Albums
Posts: 5,611
Excellent "all round" lens

It makes a good short tele, I wouldn't say that it is good for "very far away" but it is quite good for "not so far away"


Portrait and macro capabilities aside, it also does well on "normal" shots too.






edit: And I almost forgot to mention, it has excellent bokeh


NaCl(you won't be sorry getting this lens, it is quite versitile)H2O
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, lens, pentax lens, slr lens, tamron 90mm f2.8
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Tamron SP AF 90mm f/2.8 1:1 Macro Lens dgaies Sold Items 5 01-03-2010 03:11 PM
Lens value question/inquiry: Tamron 90mm F2.5 joeyc Pentax SLR Lens Discussion 12 11-19-2009 01:45 AM
pentax ist ds and tamron 90mm SP 2.8 macro lens pentaxsteve Pentax SLR Lens Discussion 12 02-11-2009 06:08 PM
PENTAX K-A TAMRON SP 90mm F:2.5 MACRO 1:2 LENS FHPhotographer Pentax SLR Lens Discussion 3 12-10-2008 07:56 AM
Tamron 90mm Macro lens, First attempt Ed in GA Post Your Photos! 10 01-20-2008 08:09 PM



All times are GMT -7. The time now is 01:37 PM. | 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