Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-18-2011, 11:08 PM   #1
Senior Member




Join Date: Feb 2010
Location: Adelaide, SA
Photos: Gallery | Albums
Posts: 273
Anyone compare the 'walkaround' Pentax zoom lens? DA*16-50 & DA17-70

Just wondered if anyone had owned both of these or had used them both enough to compare them.

I have the DA* but sometimes wonder about whether the extra 20mm reach of the 17-70 would be better for my main walk around lens (my 18-250 is more a holiday lens)


Im not overly concerned about SDM discussion here, but more about Image Quality and usability factors.
Yes, I understand i'd be losing a stop going for the 17-70 (and losing weather sealing) but the narrower ring might also allow me to use the AF160C macro ring flash with the 17-70 for when I do event/music festival photography, for a different style of flash lighting. It will not fit the 77mm of the 16-50.

Image quality?
Bokeh?
Focussing speed?
etc etc etc

I do shoot wide open a lot.


Cheers in advance for any notes

10-18-2011, 11:47 PM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,128
Focusing speed will be the same- and although I haven't done any direct comparisons, I wouldn't be surprised to see the 16-50 substantially outperform the 17-70 in other areas as well.
10-19-2011, 01:40 AM   #3
Veteran Member




Join Date: Jan 2009
Location: Budapest
Posts: 821
QuoteOriginally posted by JayR Quote
Just wondered if anyone had owned both of these or had used them both enough to compare them.
I went from the 17-70 to the 16-50. I can only speak about my copies, there seem to be quite high variation between copies of 16-50 due to poor QC. I would go back to 17-70, but I don't want to lose money again...

So what I've experienced with my copies:

QuoteOriginally posted by JayR Quote
Image quality?
Bokeh?
Focussing speed?
etc etc etc
IQ: 17-70 had some advantage in sharpness, 16-50 catched up from f/5.6.
Bokeh: can't really say anything useful here, I'm not that hang on on bokeh. Seemed to be similar, at least neither stood out and neither had distracting or harsh bokeh.
AF speed: very similar if not the same.

What disappoints me in my 16-50 is the quite poor (for an expensive DA* lens) IQ at f/2.8 and to some degree even at f/4. The larger filter size means more expensive filters. I don't really care about WR.

QuoteOriginally posted by JayR Quote
I do shoot wide open a lot
I used 17-70 wide open 95% of the time. I don't really do the same with the 16-50 because most of the time it disappoints me at f/2.8. For shooting wide open at f/2.8 the Tamron or new Sigma 17-50 would be better in my opinion (too bad I couldn't find a good copy of the former and any copy of the latter when I sold my 17-70).
10-19-2011, 04:52 AM   #4
Pentaxian
bdery's Avatar

Join Date: Mar 2008
Location: Quebec city, Canada
Photos: Gallery
Posts: 5,830
QuoteOriginally posted by JayR Quote
I do shoot wide open a lot.
Maybe a two-primes setup would be a better choice in that case?

10-19-2011, 05:38 AM   #5
Senior Member




Join Date: Feb 2010
Location: Adelaide, SA
Photos: Gallery | Albums
Posts: 273
Original Poster
QuoteOriginally posted by bdery Quote
Maybe a two-primes setup would be a better choice in that case?
Yeah I have several fast primes - the FA31/1.8, the FA50/1.4 and the FA77/1.8 but for event photog I really need a zoom - timing is such an important factor, so primes are not considered for this.



I also noticed pretty average performance at 2.8 for the DA*, hence me wondering about the 17-70... Though the shots I took for friends recently in a very dark club, ISO 3200 and B&W were helped no doubt to the 2.8 apeture, the BW wasnt such an issue and softness, well thats no biggie when shooting in a near dark room at night, imo. better to have a few slightly soft images with tons of character than none at all.
10-19-2011, 11:32 PM   #6
Senior Member




Join Date: Feb 2010
Location: Adelaide, SA
Photos: Gallery | Albums
Posts: 273
Original Poster
I suppose a side-by-side image test would be good - if anyone has done anything similar or has comparable images from both of these lenses, please post away

Pity that there arent that many shops in Adelaide with loads of Pentax stock and no chance of hiring a lens unfort - I'd do it myself otherwise!
10-20-2011, 08:17 AM   #7
Veteran Member
creampuff's Avatar

Join Date: May 2007
Location: Singapore
Photos: Gallery
Posts: 3,955
I have the DA 17-70mm f/4 and I think it is a fine lens in comparison to the Sigma 17-70mm f/2.8-4.5 that it replaced. The color rendition is really nice and the build quality is pretty good.
10-20-2011, 02:47 PM   #8
Forum Member




Join Date: Mar 2010
Location: Andalucía and the U.K.
Posts: 63
I had the 16-50 and moved to the 17-70. The former was slightly sharper at f/4 as you'd expect (stopped down as opposed to being wide open). But that was about it, and even then the difference was small. Focussing speed was identical. I found the extra 20mm very useful and I didn't need the WR so for me it was an easy choice.

10-20-2011, 11:12 PM   #9
Senior Member




Join Date: Feb 2010
Location: Adelaide, SA
Photos: Gallery | Albums
Posts: 273
Original Poster
Damn, really wish I could have a bit of a play with the 17-70 to compare, but sounds like there mightnt be tons in it anyway...
10-23-2011, 04:20 AM   #10
New Member




Join Date: Oct 2011
Posts: 8
I just got my new 17-70 and I must say I am slightly disappointed with it wide open. Compared to my old Olympus 14-54 f2.8-3.5 it is no where as sharp at all focal lengths when wide open - that is f2.8-3.5 Olympus vs f4 Pentax. You really need to stop it down to f5.6 or 6.5 before reaching the IQ levels of the Olympus. I've only had it for a couple of days so its early days yet, but that's my findings so far. I think to reach really good IQ levels you really need to go for primes such as a DA 40 or DA 70 (my next 2 lenses!)

Having said that everything else about the lens is really good - the size, weight, focal distance, build, zoom speed and noise (lack of), etc.

Last edited by kevinf7; 10-23-2011 at 04:25 AM.
10-24-2011, 02:09 AM   #11
Veteran Member




Join Date: Jan 2009
Location: Budapest
Posts: 821
Kevinf7, probably you need to fine tune AF to eliminate possible FF/BF with your copy.
10-24-2011, 07:52 AM   #12
Veteran Member
frank's Avatar

Join Date: Nov 2006
Location: Singapore
Photos: Gallery
Posts: 3,202
DA1770 got not so good review points from users because some copies have focusing problem, especially near the tele end (50~70mm). Some copies just refuse to focus if the light is just a bit low (but not too low) or contrast isn't very high. But DA*1650 seldom has focusing problem as far as I can remember. I've had both, obviously both have their pros and cons.
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!
flash, image, k-mount, lens, pentax lens, quality, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Compare/Contrast: PENTAX-D FA 100mm F2.8 Macro WR & Voigtlander 90mm F3.5 les3547 Pentax SLR Lens Discussion 28 12-08-2010 12:49 PM
For Sale - Sold: Pentax DA L 18-55mm AL "kit" zoom lens - Brand NEW (Worldwide) Genes Pentax Sold Items 5 05-28-2010 10:21 PM
For Sale - Sold: Tamron 24-135mm wide walkaround AF lens for Pentax -- Worldwide Ship! wallyb Sold Items 8 02-05-2010 01:14 PM
Standard (or walkaround) zoom lens comparisons Buschmaster Pentax SLR Lens Discussion 18 12-31-2009 11:41 AM
For Sale - Sold: Sigma 24-135mm f/2.8-4.5 AF walkaround zoom lens, Worldwide ship! wallyb Sold Items 4 09-13-2009 01:53 PM



All times are GMT -7. The time now is 08:37 AM. | 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