Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
12-02-2012, 11:52 AM   #1
New Member

Join Date: Dec 2012
Posts: 5
Canon versus Pentax 35-105mm f/3.5 constant lenses?

Both of these lenses have been referred to as a “Stack of Primes.” Are there reasons to prefer one to the other? Would there be any reason to prefer either over a Rikenon 28-100mm f/4 constant lens?

I am looking for an inexpensive but relatively good quality all-around lens with manual focus for use on a Nex 5n.

If one is better than the other, how much more would you be willing to spend? For example, if the Pentax is better than the Ricoh, is it so much better that you would spend an extra $70 and sacrifice 7mm at the wide end?

If the Pentax and Canon are better than the Ricoh, which is better than the other?

One thing I would add is that I really like the parfocus of the Ricoh.

Thanks in advance.

12-02-2012, 02:13 PM   #2
Site Supporter
ramseybuckeye's Avatar

Join Date: Apr 2009
Location: Elida, Ohio
Photos: Gallery | Albums
Posts: 8,622
I can't offer experience with either, but in case you haven't seen them, here are user reviews on the SMC Pentax-A 35-105mm F3.5
12-02-2012, 02:31 PM   #3
RobA_Oz's Avatar

Join Date: Nov 2008
Location: Tasmania, Australia
Photos: Gallery
Posts: 4,332
The A35-105 is supposed to be one of the older lenses that works well with DSLR sensors, because the rear element coating is improved over that of earlier lenses, thereby reducing reflections off the sensor that lower IQ.

Having said that, I have found that the contrast of images taken with my copy (purchased for a song during a visit to the US some years ago) needs a fair bit of PP to come up to scratch. I've also fitted a lens hood to help that along, especially when using a front filter. It is sharp, IMHO, but the contrast lets it down. In the right circumstances, it thoroughly deserves the reputation it has.

I can't speak for the Canon or Rikenon, as I have no experience with them.

Last edited by RobA_Oz; 12-03-2012 at 06:07 AM. Reason: Corrected reference to Canon
12-02-2012, 02:32 PM   #4

Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,831
There are also some more sample images from the SMC A 35-105 lens here:

12-02-2012, 04:18 PM   #5
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,863
Not really related to the question, but I'm always wondering how 'macro' the Pentax is. Does it go to 1:4 or to 1:2?
12-02-2012, 04:36 PM - 1 Like   #6
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,626
2.5 magnification, so 1:4
12-02-2012, 05:30 PM   #7
Veteran Member
msatlas's Avatar

Join Date: Dec 2009
Location: Madison, WI
Posts: 309
So I just did a little googling to see what I could find out about that Ricoh 28-100. It supposedly has a lot of barrel distortion on the wide end according to Subjective Impressions of K-Mount Lenses (scroll about halfway down).

As for the Canon vs Pentax I'm not sure there's much to distinguish between them. They have similar dimensions aside from the Canon taking 72mm filters to the Pentax's 67mm. The Canon has a 5-blade aperture and the Pentax has 6 blades. Their "macro" range is also pretty similar.

Keep in mind that on an APS-C camera like the NEX, 35mm is a slightly-long normal focal length so you may find you need to go wider.
12-13-2012, 12:46 PM   #8
New Member

Join Date: Dec 2012
Posts: 5
Original Poster
Barrel distortion and pincushioning seem average to me

I am not having the same problems with barrel distortion and pincushioning thatthe subjective reviewer indicates. I wonder if this is because I am shooting with anAPC-C. There is some barrel distortion at 28mm and some pincushioning at 100mm. The atttached photos were taken at a distance of about 4 feet.

Attached Images
12-13-2012, 08:57 PM   #9
Veteran Member
msatlas's Avatar

Join Date: Dec 2009
Location: Madison, WI
Posts: 309
The distortion doesn't look too bad, and I'd say using it on APS-C may help in that regard. I'd be more concerned about the 28mm shot not being particularly sharp. Unless the focus is maybe just a bit off?

I you're happy with the Ricoh 28-100, I'd probably look into finding something wider to complement it, rather than replace it with the Pentax or Canon 35-105s. Like for example a Tokina 17/3.5.
12-14-2012, 08:01 AM   #10
New Member

Join Date: Dec 2012
Posts: 5
Original Poster
Focus is off

Thanks msatlas. The focus is off. When in focus, the lens is quite sharp.
12-14-2012, 09:04 AM   #11
TaoMaas's Avatar

Join Date: May 2007
Location: Oklahoma City
Photos: Gallery | Albums
Posts: 3,197
Putting the Pentax 35-105 on a Nex 5n totally defeats the purpose of the Sony because it's such a large, heavy lens. It even makes my K10D more of a handful...and that's saying something!
12-14-2012, 10:32 PM   #12

Join Date: Nov 2007
Location: Western Canada
Posts: 4,095
I have a Pentax A 35-105 Macro zoom. I bought it new in ' was my main lens on my wife's K1000 from then to 2006. I've used it on my K10D +_ K-5...manual's are excellent...whether on film or digital bodies.

Mine is built like a tank....and going on 30 years use in 2014. I still regard it as one of my best lenses....although the digital lenses with their automatic focusing are used more often by me, as I'm in my 60's and my eye's aren't as good when focusing manually anymore.

  • 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!
canon, k-mount, lens, pentax, pentax lens, ricoh, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanted - Acquired: Pentax A 35-105mm f/3.5 Macro xinanbei Sold Items 4 10-21-2012 08:51 PM
For Sale - Sold: Pentax A 35-105mm f/3.5 Macro loveisageless Sold Items 2 09-16-2012 06:45 PM
Pentax A 35-105mm f/3.5 vs Sigma 50-200mm f/4-5.6 OS HSM toaruna Pentax SLR Lens Discussion 15 06-27-2012 01:45 PM

All times are GMT -7. The time now is 12:44 PM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]