Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-08-2011, 10:15 AM   #1
Veteran Member
sany's Avatar

Join Date: Mar 2011
Location: Dubai, UAE
Photos: Gallery | Albums
Posts: 428
Tamron 28-75 f2.8 vs Pentax DA 35mm f2.4

I am aware that this is not a fair comparison as one is a zoom and the other one is a prime. Leaving aside the advantage of the zoom with variable useful FLs, which one wins in the IQ department and overall optically?

I am also noticing the last review for tammy mentions that it as not being as good as DA 35 f2.4 in the IQ department!!


Last edited by sany; 08-08-2011 at 10:49 AM.
08-08-2011, 10:56 AM   #2
Veteran Member




Join Date: May 2011
Location: Southern California
Photos: Albums
Posts: 4,082
The Tamron really is good through the whole range, but it's not going to beat your DA 35. I think it would be very hard to tell the difference however.
08-08-2011, 01:18 PM   #3
Senior Member
sagiboy's Avatar

Join Date: Aug 2009
Location: LI
Posts: 230
super sharp..

Tammy is a superb lens...!!!!!!
Attached Images
 
08-08-2011, 01:23 PM   #4
Pentaxian
mattb123's Avatar

Join Date: Apr 2010
Location: Colorado High Country
Photos: Gallery
Posts: 7,031
I just picked up the Tamron 28-75 and have only had it a couple of days, but so far I really like it. My main lenses have been the DA40 and DA15 limited primes for the last year or so and the IQ of this zoom doesn't fall noticeably short.




08-09-2011, 08:11 PM   #5
Veteran Member
sany's Avatar

Join Date: Mar 2011
Location: Dubai, UAE
Photos: Gallery | Albums
Posts: 428
Original Poster
please look at this last review

Tamron 28-75mm F2.8 AF XR Di LD Macro SP Lens Reviews - Current Zoom Lenses - Pentax Third-Party Lens Review Database
08-09-2011, 09:36 PM - 1 Like   #6
Pentaxian
Edgar_in_Indy's Avatar

Join Date: May 2010
Location: Indiana, USA
Photos: Gallery
Posts: 2,554
QuoteOriginally posted by sany Quote
please look at this last review
Why would you single that particular review out as significant? I just read that review, and was left wondering if the reviewer was actually reviewing the Tamron 28-75mm. "Awful at f/2.8"? "noticeable vignetting"?

I guess his "awful" f/2.8 could be explained by a bad copy (or bad technique), but "noticeable" vignetting? On an APS-C camera? I don't think so. This lens was originally designed for to cover full frame, and as such, has glass to spare when used on an APS-C camera (ie any Pentax digital SLR). You would have a VERY hard time finding a lens with LESS vignetting, and there's hard data to back this up in some of the professional reviews. I've shot thousands of images with my 28-75mm, and never notice any vignetting. Now the Tamron 17-50mm is another story...

That reviewer registered in 2008, and only has 5 posts to his name. I couldn't find any pictures he's posted, and if you do a search for all his posts, it actually only comes up with a single post (from 2009, and not related to the Tamron). So who knows what's up with this guy, and whether the problem was him, or the lens.

Ironically, the only praise he gives the lens is for it's autofocus performance. In my experience, autofocus accuracy and speed is only average with this lens.

If anybody wants to see how "awful" the Tamron 28-75mm is at f/2.8, be sure to check out my thread where I've posted a bunch of images, mostly shot at f/2.8:

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/145599-tamron-...lots-pics.html

In post #2 of that thread, you can click on the first picture to see a full size, 12MP image shot at f/2.8.
08-09-2011, 09:52 PM   #7
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,430
QuoteOriginally posted by Edgar_in_Indy Quote
"noticeable vignetting"?
Maybe he had his lens hood at 90 degrees :-)

QuoteQuote:
"awful"
At one time, "awful" meant "awesome":-)

I don't recall seeing vignetting on my copy, though barrel distortion is not so hot. For some reason (DA 40, DA 70) I don't use the Tamron too much.
08-09-2011, 10:15 PM   #8
Pentaxian
Edgar_in_Indy's Avatar

Join Date: May 2010
Location: Indiana, USA
Photos: Gallery
Posts: 2,554
I don't usually ever bother correcting any barrel distortion from the 28-75mm, because I almost never notice any. Then again, I don't spend much time at 28mm, where it's most pronounced.But even there, according to photozone.de, it's only 1.5%. By 40mm, distortion is gone, and it winds up with 0.4% pincushion at 75mm. So throughout most of the range it's negligible.

For comparison, the Tamron 17-50mm and Pentax 18-55mm both start at 2.5%. Not really apples-to-apples due to different ranges, but it puts the 1.5% in perspective.

08-09-2011, 11:41 PM   #9
Pentaxian
hoanpham's Avatar

Join Date: Nov 2009
Location: Strand
Photos: Gallery | Albums
Posts: 1,360
The Tamron is very sharp to be a zoom. It surprises me first time I use it. It has acceptable sharpness at f2.8, acceptable weight. Consider your choice between the DA35, if I have to select one, I will go for the Tamron due to flexibility. However it is not a prime and the DA35 is very light weight. So it depends on your need.

The Tamron quickly becomes my first choice of one lens coverage, still not wide enough some time. The Tamron is what I use to record the event, not much for artistic reasons.

Hopes this help.
Cheers
08-10-2011, 02:23 AM   #10
Veteran Member
ytterbium's Avatar

Join Date: Jan 2008
Posts: 1,076
Well the biggest difference and decision i think is between physical properties and usage specifics (zoom vs fix):

Tamron: 73x92mm, 510g (Tamron AF 28-75mm f/2.8 SP XR Di LD Aspherical (IF) - Review / Test Report)
Pentax: 45x63mm, 124g (Pentax SMC DA 35mm f/2.4 AL - Review / Lens Test)

Other than that i think they are too different to compare. Most common prime vs zoom differences are true.

One thing i'd like to point out is that for general shooting (indoors, people) both of the lenses could do the job (in addition the tamron could extend to portrait focal lengths).
For more advanced photography you'd still need additional lenses with both options (e.g. wide landscapes - 15..20mm or closer portraits/nature 100...200 or more).
Considering this, i don't think the tamron has much to offer in flexibility. With something like 35mm vs 16-45..50, 17-50, or 50mm/70mm vs 50-200, 35-135 etc the situation would be different. The range 28-75 even if one of most used on APS-C doesn't offer much difference in perspective and coverage.
08-10-2011, 02:36 AM   #11
Pentaxian
starbase218's Avatar

Join Date: Sep 2009
Location: Groningen, The Netherlands
Posts: 1,017
I have had both, and think the DA is a bit better both in sharpness wide-open and exposure (Tammy seemed to overexpose slightly). But the difference isn't big and should IMHO not be used as an argument not to consider the Tamron.

For me though, the zoom range of the Tammy on APS-C was not convenient. So I got a 17-70 and the 35mm.

edit: I don't see this as a "versus" thing because the lenses are so different. On the one hand you have a cheap, ultralight prime. On the other, you have a big, heavy, creeping zoom. In my collection of lenses and regarding my shooting style I ended up with more need for the 35mm than for the 28-75.

Last edited by starbase218; 08-10-2011 at 03:12 AM.
08-10-2011, 09:02 AM   #12
Veteran Member
sany's Avatar

Join Date: Mar 2011
Location: Dubai, UAE
Photos: Gallery | Albums
Posts: 428
Original Poster
QuoteOriginally posted by ytterbium Quote
Well the biggest difference and decision i think is ........Considering this, i don't think the tamron has much to offer in flexibility. With something like 35mm vs 16-45..50, 17-50, or 50mm/70mm vs 50-200, 35-135 etc the situation would be different. The range 28-75 even if one of most used on APS-C doesn't offer much difference in perspective and coverage.
Hi, can you elaborate the last line a bit more please. Are you trying to say, that with 35mm around we can go for those range of choices to go as a matching pair!? I am trying to understand.
08-10-2011, 09:23 AM - 1 Like   #13
Veteran Member




Join Date: May 2011
Location: Southern California
Photos: Albums
Posts: 4,082
QuoteOriginally posted by ytterbium Quote
Look at the review on an aps-c and it's much different. The lens gets 4 stars(very high for photozone) on aps-c. 28-75 is very usable on aps-c. It ranges from normal to portrait. Saying the perspective doesn't vary enough with this zoom is like saying someone should only buy an FA50 and zoom with their feet to match all perspectives. Which is not always an option.

Tamron AF 28-75mm f/2.8 SP XR Di LD Aspherical (IF) (Nikon) - Review / Lab Test Report - Analysis
08-10-2011, 02:13 PM   #14
Veteran Member
ytterbium's Avatar

Join Date: Jan 2008
Posts: 1,076
QuoteOriginally posted by sany Quote
can you elaborate
Yes. Maybe a little bad choice of words from my side. I was thinking that 28-75 doesn't offer THAT MUCH more flexibility, so one couldn't do in those situations with 35mm alone. Especially with the fast F2.4 aperture, it can be used as a borderline portrait lens too.

It certainly allows to take completely different types of photographs at both of its extremes, but in a situation where one would HAVE to change lenses while using 35mm, one most likely would be changing lenses with 28-75 as well.
08-11-2011, 08:32 AM   #15
Veteran Member
sany's Avatar

Join Date: Mar 2011
Location: Dubai, UAE
Photos: Gallery | Albums
Posts: 428
Original Poster
thanks ytterbium, for obliging.
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!
da, f2.4, f2.8 vs pentax, iq, k-mount, pentax da 35mm, pentax lens, slr lens, tamron 28-75 f2.8, vs pentax da
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax K-7, DA 35mm Macro, Tamron 17-50mm, 18-250mm, & Metz 48-AF1 Flash (US/C jonlee Sold Items 14 06-28-2010 08:27 PM
For Sale - Sold: Pentax K20D, FA 35mm 2.0, FA 50mm 1.4, Sigma 12-24mm, Tamron 90mm, D-BG2, TTL imadethis Sold Items 15 02-09-2010 02:02 PM
pentax 35mm or tamron 90mm pentxfun Pentax SLR Lens Discussion 30 11-06-2009 01:10 PM
For Sale - Sold: Sigma APO EX 70-200mm/f2.8, Pentax FA 35mm/f2, Tamron 28-75mm/f2.8 chemxaj Sold Items 15 06-26-2008 06:58 PM
For Sale - Sold: [CLOSED] FS: Samsung 35mm f/2; Tamron 70-300mm f/4.5-5.6 LD; Pentax DA kit lens. ZaphodB Sold Items 8 11-28-2007 07:24 AM



All times are GMT -7. The time now is 09:19 AM. | See also: NikonForums.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