Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-19-2013, 06:36 AM   #1
Pentaxian




Join Date: Nov 2008
Location: Bangalore
Photos: Gallery
Posts: 2,450
K135 f3.5 vs M135 f3.5

I was just offered K135 f3.5 lens for a good price only to find later that it's M135 which I already have (received today actually).

Just wondering about difference between two lenses in terms of IQ. K135 looks significantly bigger than M135, both in length and the diameter.

Images are not to the scale but you can still see the difference, K135 has relatively large barrel.

K135


M135


02-19-2013, 07:04 AM   #2
Pentaxian
hoanpham's Avatar

Join Date: Nov 2009
Location: Strand
Photos: Gallery | Albums
Posts: 1,366
I like the outcome of K135/3.5 better than the M version.
Color rending is some what richer in color, but I never run a detail test to compare.

Both lenses are less used than K135/2.5 and smc Tak 135/2.5.
02-19-2013, 11:04 AM   #3
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,125
They did change the formula a bit in the M version to make it lighter, but overall I'd expect both to be about just as good. In terms of sharpness they're fine, the only major issue is of course aberrations.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

02-19-2013, 12:16 PM - 1 Like   #4
Pentaxian
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 4,859
That's my K135/3.5 photo, not that it is a very good photo. The K version is the same formula as the Super-Multi-Coated Takumar 135mm f3.5, only 4 elements but it seems to work well. I have seen a comparison with the M version that showed slightly better K version performance for astrophotography. I thought they were pretty close in general photography. It has the rectangular baffle on the mount like a lot of K telephotos, 52mm filter, seems about 10% bigger than it needs to be. No sliding hood and only six aperture blades are slight negatives. For some reason there aren't many around. The Takumar is very common and the M is also common. I think the K might have just had a late start to production. I got the K version out of curiosity but decided I was unlikely to ever use it instead of the M, so sold it.

02-19-2013, 04:39 PM   #5
Site Supporter
gofour3's Avatar

Join Date: Oct 2008
Location: Vancouver, Canada
Posts: 5,339
QuoteOriginally posted by Just1MoreDave Quote
That's my K135/3.5 photo, not that it is a very good photo. The K version is the same formula as the Super-Multi-Coated Takumar 135mm f3.5, only 4 elements but it seems to work well. I have seen a comparison with the M version that showed slightly better K version performance for astrophotography. I thought they were pretty close in general photography. It has the rectangular baffle on the mount like a lot of K telephotos, 52mm filter, seems about 10% bigger than it needs to be. No sliding hood and only six aperture blades are slight negatives. For some reason there aren't many around. The Takumar is very common and the M is also common. I think the K might have just had a late start to production. I got the K version out of curiosity but decided I was unlikely to ever use it instead of the M, so sold it.
The K135/3.5 had the short production run from June 1975 to 1977 when the M version was released. I got my K135/3.5 new in late 1975, it was the cheapest K Series telephoto at that time.

Phil.
02-20-2013, 01:10 PM   #6
Veteran Member
glasbak's Avatar

Join Date: Apr 2009
Location: Netherlands
Posts: 346
On film, the K version is the better one, on APS-C, the not so good corners and borders of the M version fall outside the sensor area.
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!
f3.5, k-mount, k135, m135, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax 18-135mm f3.5-5.6EDAL[IF]DCWR or Sigma 18-200 f3.5-6.3 DC - which one?? coylum Pentax SLR Lens Discussion 17 07-05-2013 07:32 PM
Zeiss 35-70 f3.4 vs f3.5? dof Pentax SLR Lens Discussion 5 12-31-2012 12:21 AM
For Sale - Sold: MX, ME supers, M28 f2.8, M50 f1.4, M135 f3.5, Vivitar 70-210 f3.5 zhuxyg Sold Items 15 10-05-2011 04:10 PM
For Sale - Sold: FA43mm F1.9, Tamron 90mm F2.5, M 50 F1.7, M28 F3.5, M135 F3.5 joeyc Sold Items 16 12-11-2009 06:39 AM



All times are GMT -7. The time now is 02:00 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