Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-25-2012, 06:04 AM   #1
Senior Member




Join Date: Dec 2010
Location: Pembrokeshire, Wales,UK
Posts: 152
Urgent. Tamron sp90 non di opinion please

Hi all, just discovered the lens I was interested in is the non Di version (gen mistake by retailer). Is it worth me worrying about it being the non di version for use on my K5? or will I not really notice any difference. I assume the rest is bascially the same and the quality is still superb?

It's still 175 though :-(

woody
Forgot to say it's still the 2.8 not the 2.5


Last edited by ukwoody; 06-25-2012 at 06:13 AM.
06-25-2012, 06:09 AM   #2
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,624
The Di version is only different from the non-Di version in cosmetics and the Di coating (which supposedly reduces flare, but I have not noticed a difference).

The non-Di version is a great bargain lens as it is very sharp, renders colors quite well, and has the Tamron lovely bokeh.
06-25-2012, 06:18 AM   #3
Senior Member




Join Date: Dec 2010
Location: Pembrokeshire, Wales,UK
Posts: 152
Original Poster
umm just read somewher ther non di version was designed for 35mm film and has different focal lengths ect? and on digital you are only using part of the image?

woody Does that sound right?
06-25-2012, 06:21 AM   #4
Loyal Site Supporter
pacerr's Avatar

Join Date: Jan 2008
Location: Henry, TN
Photos: Gallery | Albums
Posts: 2,850
While the effect of Di coating may be measured in test labs, and applies only to specific circumstances anyway, the solid reputation of the lens has been built over time as it is.

Without a direct, side-by-side comparison with an identical lens with (an undefined) Di coating you'll never be able to tell the difference in practical use.

While you're at it, pick up copies of the SP AF 10-24, 17-50, 24-135 and 28-75 -- all good lenses. And all designed for full frame film so, yes you're only using the center "sweet spot" of the image circle -- which has nothing to do with the Di coating.

06-25-2012, 06:23 AM   #5
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,624
No - there is no difference there. I believe both the Non-di and the Di versions cover the full 35mm (full frame) sensor.

The only difference between the two lenses is the coating (Di coating) and some cosmetics (the newer version looks and feels better).
06-25-2012, 07:09 AM   #6
Site Supporter




Join Date: Apr 2011
Location: Oklahoma
Posts: 309
I've got the Di version - it's really a superb lens. I'd highly recommend it.
06-25-2012, 07:36 AM   #7
Senior Member




Join Date: Dec 2010
Location: Pembrokeshire, Wales,UK
Posts: 152
Original Poster
many thanks guys, just bought it right now!

woody
06-25-2012, 06:53 PM   #8
Site Supporter
jimr-pdx's Avatar

Join Date: May 2010
Location: 1hr north of PDX
Photos: Gallery | Albums
Posts: 3,480
You will be hard-pressed to see a difference. Tamron's website states that it is optically identical, as JinDesu says. I had the non-Di and it was an excellent lens. It wasn't a great fit in my kit, but that was in no way the lens' fault!


Last edited by jimr-pdx; 06-26-2012 at 05:48 AM.
06-26-2012, 02:37 AM   #9
Senior Member




Join Date: Dec 2010
Location: Pembrokeshire, Wales,UK
Posts: 152
Original Poster
Thanks Jimr!]

woody
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!
di, k-mount, pentax lens, slr lens, version
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
tamron sp90 advice please ukwoody Pentax SLR Lens Discussion 5 06-25-2012 01:01 AM
For Sale - Sold: DA35/2.4, Tamron SP90 macro, Sears 50/1.4 and a few others jimr-pdx Sold Items 1 02-25-2012 11:47 AM
Urgent opinion...is my 16-50 faulty? manowar1978 Pentax SLR Lens Discussion 11 06-01-2011 03:00 PM
Attention Tamron 70-200 f/2.8 and Pentax 300/f4 SDM users- need urgent help Aditya Panda Pentax SLR Lens Discussion 22 11-14-2008 03:46 PM
Opinion on Tamron 28-75mm/f2.8? raider Pentax SLR Lens Discussion 12 08-12-2007 10:41 PM



All times are GMT -7. The time now is 02:41 PM. | 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