Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-05-2008, 03:21 PM   #1
Senior Member




Join Date: Nov 2008
Location: BC
Posts: 219
Pentax 17-70 f4?????

Does anybody out there have this lens? I'm upgrading to K20d, and don't know if I should go the 16-45 f4 vs Pentax 17-70 f4. Is it worth the extra money???

11-05-2008, 03:58 PM   #2
Veteran Member
rburgoss's Avatar

Join Date: May 2008
Location: San Jose, Costa Rica
Photos: Gallery | Albums
Posts: 972
I dunno. The Da16-45 is one of the best wide to short tele zooms out there. It is fully compatible with all Pentax DSLR's. The newer DA17-70 is SDM Only, meaning it will not AF with istD* series bodies. I am sure the extra mm at the long end will come in handy, but at almost twice the price, I would consider the purchase.

If I had the money to get the 17-70, (and not have the DA16-45) I would look into the DA* 16-50 a little closer. It is a lot faster, sealed, SDM and screw AF, but then, there are many bad copies roaming this world... nevermind

Robert B
11-05-2008, 04:00 PM   #3
Veteran Member
Ben_Edict's Avatar

Join Date: Jul 2007
Location: SouthWest "Regio"
Photos: Albums
Posts: 3,303
I have been contemplating this lens too. German photo magazine "Color Foto" has reviewd it very favouribly, even with better IQ than the 16-50 and at least matching the performance of the 16-45. If this is true, the 17-70 is by far the better buy.

Ben
11-05-2008, 05:06 PM   #4
Veteran Member




Join Date: Nov 2006
Location: central Singapore
Photos: Gallery
Posts: 409
QuoteOriginally posted by mokey Quote
Does anybody out there have this lens? I'm upgrading to K20d, and don't know if I should go the 16-45 f4 vs Pentax 17-70 f4. Is it worth the extra money???
I had the 16-45 some time ago and sold it. I was less impressed than a lot of other owners - it seemed very soft at the edges at wide angle. And I hated the way it extended at wider angles. Felt all wrong, a trivial point though that might seem. For the money I didn't feel it offered enough advantage over the kit 18-55. Although the Sigma 17-70 is a bit big and heavy for my taste, with a scarily large front element, it performs better than my 16-45 did, with a more useful range thrown in. But the first two Sigs I had were dud copies, so good luck if you go in for that particular lottery. Don't know about the Pentax 17-70 - sounds as if that too is a bit variable, and it's certainly not cheap.

Not very helpful, sorry - after a lot of frustration and money spent, sometimes I come back to thinking that the 18-55 is in fact the best available combination of lightness, compactness and reasonable quality for a standard walkaround zoom, if all those factors are important to you.

11-05-2008, 05:12 PM   #5
Senior Member




Join Date: Nov 2008
Location: BC
Posts: 219
Original Poster
thx I checked out the color foto website (a better knowledge of the german language was necessary)
I'm pushing the budget already to get the 17-70, so I'm not sure if pushing it any further for the 16-50 f/2.8 is wise. I have the 50-135 f2.8, and I absolutely love it. Agh
11-05-2008, 05:16 PM   #6
Senior Member




Join Date: Nov 2008
Location: BC
Posts: 219
Original Poster
QuoteOriginally posted by timo Quote
I had the 16-45 some time ago and sold it. I was less impressed than a lot of other owners - it seemed very soft at the edges at wide angle. And I hated the way it extended at wider angles. Felt all wrong, a trivial point though that might seem. For the money I didn't feel it offered enough advantage over the kit 18-55. Although the Sigma 17-70 is a bit big and heavy for my taste, with a scarily large front element, it performs better than my 16-45 did, with a more useful range thrown in. But the first two Sigs I had were dud copies, so good luck if you go in for that particular lottery. Don't know about the Pentax 17-70 - sounds as if that too is a bit variable, and it's certainly not cheap.

Not very helpful, sorry - after a lot of frustration and money spent, sometimes I come back to thinking that the 18-55 is in fact the best available combination of lightness, compactness and reasonable quality for a standard walkaround zoom, if all those factors are important to you.
you know , I agree with you regarding the 16-45. My friend has one, and I tested it against my 18-55 at the time , and I didn't find $300 difference. Maybe I should just go with the new 18-55 II that comes with the k20d. (my original 18-55 had a mishap with the k10d-thus I'm on to new and hopefully better things)
11-05-2008, 07:52 PM   #7
Pentaxian
Wheatfield's Avatar

Join Date: Apr 2008
Location: The wheatfields of Canada
Posts: 10,157
QuoteOriginally posted by mokey Quote
Does anybody out there have this lens? I'm upgrading to K20d, and don't know if I should go the 16-45 f4 vs Pentax 17-70 f4. Is it worth the extra money???
I tried one, it had more barrel distortion at the wide end than I was comfortable with.
11-05-2008, 08:24 PM   #8
Veteran Member




Join Date: Mar 2007
Location: Toronto (for now)
Posts: 1,749
If the price drops 40% i'd consider one. Until then there are far too many good 16/17/18 to whatever lenses available.

11-05-2008, 08:27 PM   #9
Veteran Member




Join Date: Feb 2008
Location: Toronto
Posts: 3,915
how about the Sigma 17-70?
DA17-70 side by side with Sigma 17-70: Pentax SLR Talk Forum: Digital Photography Review
11-05-2008, 10:04 PM   #10
Senior Member




Join Date: Nov 2008
Location: BC
Posts: 219
Original Poster
that was a great thread-took me awhile to get thru it-very informative
I still don't know what to do. I'll maybe try out what they have in store for feel, and hope I get a good one of whatever I choose.
thx for the info
11-06-2008, 01:07 PM   #11
Pentaxian
audiobomber's Avatar

Join Date: May 2008
Location: Sudbury, Ontario
Photos: Albums
Posts: 6,688
QuoteOriginally posted by mokey Quote
you know , I agree with you regarding the 16-45. My friend has one, and I tested it against my 18-55 at the time , and I didn't find $300 difference. Maybe I should just go with the new 18-55 II that comes with the k20d. (my original 18-55 had a mishap with the k10d-thus I'm on to new and hopefully better things)
Not my experience at all. I replaced the 18-55mm with the 16-45 and I couldn't be happier. Brighter, better colours, sharper by far. Maybe you tried the 16-45 on a 6mp camera? The K20D really shows up the difference in sharpness.
11-06-2008, 06:45 PM   #12
Veteran Member




Join Date: Mar 2007
Location: Toronto (for now)
Posts: 1,749
QuoteOriginally posted by mokey Quote
that was a great thread-took me awhile to get thru it-very informative
I still don't know what to do. I'll maybe try out what they have in store for feel, and hope I get a good one of whatever I choose.
thx for the info

There is a 17-70 siggy ont he marketplace for $300.

Bargain.
11-06-2008, 07:17 PM   #13
Senior Member




Join Date: Nov 2008
Location: BC
Posts: 219
Original Poster
thx I'll check it out. It's one of my choices, but I just can't seem to make up my mind. and I pick up the 20d tomorrow. decisions decisions
I've already got a 50mmf1.7 ,50-135mmf2.8(LOVE THIS LENS), 100-300 , 12-24 f4, and an old 100 f4 macro.
So now I'm possibly considering just getting the kit lens with it, and picking up a Pentax 24-90 off of ebay (agh)? Any thoughts?
11-07-2008, 02:47 AM   #14
Veteran Member
Ben_Edict's Avatar

Join Date: Jul 2007
Location: SouthWest "Regio"
Photos: Albums
Posts: 3,303
QuoteOriginally posted by mokey Quote
thx I'll check it out. It's one of my choices, but I just can't seem to make up my mind. and I pick up the 20d tomorrow. decisions decisions
I've already got a 50mmf1.7 ,50-135mmf2.8(LOVE THIS LENS), 100-300 , 12-24 f4, and an old 100 f4 macro.
So now I'm possibly considering just getting the kit lens with it, and picking up a Pentax 24-90 off of ebay (agh)? Any thoughts?
Given the lenses you already have, it might be a good idea to go for a 18-50/2.8 Sigma instead of the kit lens. I have the older non-Macro version of the Sigma and can only say, that it is sharp and contrasty and well useable even fully open. It is quite small and lightweight, much smaller indeed than the Pentax 16-50 or the 17-70.

Ben
11-07-2008, 07:49 AM   #15
Inactive Account




Join Date: Jun 2008
Location: Dakar
Photos: Gallery
Posts: 17
first tests of 17-70

I have this lens since June and am learning about its strenghts and limitations. It has some strange characteristics which I am starting to understand. I'll post some test shots when I have some spare time (year end is tough jobwise)...

It has a great snappy contrast, colors are great, weight and look are perfect, autofocus is smooth and fast and silent. I don't see centering defects in my copy.

Optically it has some inverse behavior at shorter and at longer focal lenghts, which is perhaps intentionnal by design.

Longer focal lengths (>35mm): a bit sharper than my DFA 100mm macro at f11-f16; but very soft up to f11 (there is a jump in sharpness past f8) and at f22. Sharpness at f8 about the same as at f4! Sweet spot is f11 where it shines.

17mm focal length: very soft at f4 but a bit sharper than DFA100mm stopped down (even at f5.6 which is the sweet spot) up to f22. It produces stunning landscapes stopped down 1 stop or more.

So knowing that I have been able to get very sharp and snappy pictures. But it is not what the tests in CI showed... so I believe there is some variability from lens to lens.

I have started to notice some problems locking focus af 70mm even in good light and contrast, perhaps it is due to the softness at f4? (advises welcome.) But I may send it to Pentax repair because 1) it is very annoying when you press the shutter and cannot take the shot; 2) it is not normal, I think, that it is so soft at f8 for longer focal length.
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!
f4, k-mount, pentax, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -7. The time now is 06:15 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