Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-24-2008, 07:05 PM   #1
Veteran Member
Ivan Glisin's Avatar

Join Date: Nov 2006
Location: Belgrade
Posts: 656
DA17-70: was that a DA16-45-based mockup only?

I was just reviewing the (old) news about the upcoming DA 17-70mm F4 and looking at some pictures and I have noticed something I missed initially (#1 and #2):

1) If DA 17-70 is going to be a SDM lens, should it have an AF/MF switch? And if so, I can not see AF/MF switch on the exhibited "mockup" version. Where is it?

2) "PENTAX" logo stamped on the hood is of the old "wide" style, the same as on DA 16-45. New Pentax lenses do have taller logo on them. I suspect it is a DA16-45 lens hood.

3) I have also noticed earlier that the size appears to be exactly the same as DA16-45. I can hardly believe that completely different optical and mechanical design can fit into precisely the same barrel.

So my guess is: Pentax has just repainted zoom and distance scale markings on a DA16-45 and put metal plaque to read "PENTAX 17-70 SDM", but the mockup lens itself was in fact DA16-45. Although it is possible that DA17-70 will look very similar to DA16-45 I am expecting production DA17-70 to be noticeably different than exhibited mockup. At least AF/MF switch should be added somewhere with some space made for the switch which may result in having narrower zoom ring. Perhaps even focusing ring may end up being wider similar to one on DA55-300.

Makes sense?

02-24-2008, 07:18 PM   #2
Veteran Member
wlachan's Avatar

Join Date: Sep 2006
Location: Canada
Photos: Albums
Posts: 2,626
The DA17-70/4 looks slightly fatter and will probably use bigger filter (72 or 77mm I think). The phyical dimension is also shortest at 17mm now.
02-24-2008, 07:21 PM   #3
Veteran Member
creampuff's Avatar

Join Date: May 2007
Location: Singapore
Photos: Gallery
Posts: 3,955
QuoteOriginally posted by Ivan Glisin Quote

...So my guess is: Pentax has just repainted zoom and distance scale markings on a DA16-45 and put metal plaque to read "PENTAX 17-70 SDM", but the mockup lens itself was in fact DA16-45. Although it is possible that DA17-70 will look very similar to DA16-45 I am expecting production DA17-70 to be noticeably different than exhibited mockup...

Makes sense?
Your suggestion is unfounded and frankly ridiculous. Pentax is not a mom-and-pop company to come out with a pre-production prototype that is a repainted DA 16-45. Just because it may look similar doesn't mean that it is. To me the 17-70 looks different.
02-24-2008, 07:43 PM   #4
Veteran Member
Ivan Glisin's Avatar

Join Date: Nov 2006
Location: Belgrade
Posts: 656
Original Poster
QuoteOriginally posted by creampuff Quote
Your suggestion is unfounded and frankly ridiculous. Pentax is not a mom-and-pop company to come out with a pre-production prototype that is a repainted DA 16-45. Just because it may look similar doesn't mean that it is. To me the 17-70 looks different.
First, my suggestion is founded and that is for the reasons I listed. I believe that all of them make sense. You must agree it is not entirely impossible that if they wanted to relabel DA16-45 they could have done it technically. It indeed looked a bit "fatter" than DA16-45 at first, but then I have tried to compare several DA16-45 images from various sources and it is almost impossible to resize for both diameter and length to match. I think size comparison can not be conclusive at this point.

Second, about the "mom-and-pop" approach: if you remember well 645D was also changing shape several times, and it was most likely an empty piece of plastic each time. On one show (Photokina?) they even painted top LCD to simulate working camera, while it was not. It is not unusual for big and serious manufacturers to display relabeled existing products or unfinalized mockups as placeholders for future products, just to generate interest. Nothing really bad about it.

And finally, if you are right and displayed DA17-70 SDM was really a final DA17-70 SDM design, where is the AF/MF switch? I believe it should be there, but I can't see it.

02-24-2008, 07:54 PM   #5
Senior Member
kyrios's Avatar

Join Date: Apr 2007
Location: Indonesia
Posts: 123
QuoteOriginally posted by wlachan Quote
The DA17-70/4 looks slightly fatter and will probably use bigger filter (72 or 77mm I think). The phyical dimension is also shortest at 17mm now.
DA 17-70/4 has 67mm filter thread.

kyrios
02-24-2008, 08:37 PM   #6
Veteran Member
Finn's Avatar

Join Date: Feb 2007
Location: Phoenix
Photos: Gallery
Posts: 1,056
I'm sure it was just a hollow plastic mock-up. How long ago did we first see the DA* 200 and 300? And they are just now hitting the market? I figure we might see the 17-70 in 2010 or so...
02-25-2008, 07:14 AM   #7
Inactive Account




Join Date: Feb 2007
Location: Gloucester UK
Posts: 441
QuoteOriginally posted by Finn Quote
I'm sure it was just a hollow plastic mock-up. How long ago did we first see the DA* 200 and 300? And they are just now hitting the market? I figure we might see the 17-70 in 2010 or so...
It's due to be released this summer, probably around July/August time. Pentax now seem to have the ability to deliver in the anticipated time frames, in fact they seem to be slightly ahead of their release dates at the moment.

Times are indeed changing!
02-25-2008, 07:23 AM   #8
Inactive Account




Join Date: Feb 2007
Location: Gloucester UK
Posts: 441
QuoteOriginally posted by Ivan Glisin Quote
I was just reviewing the (old) news about the upcoming DA 17-70mm F4 and looking at some pictures and I have noticed something I missed initially (#1 and #2):

1) If DA 17-70 is going to be a SDM lens, should it have an AF/MF switch? And if so, I can not see AF/MF switch on the exhibited "mockup" version. Where is it?

Makes sense?
Not neccesarily so, it's not a DA* lens, so I expect that it will "look and feel" very similar to the normal DA lenses. The selection of AF/MF will be done on the body as usual.

The SDM AF will be automatically detected on bodies that support SDM (with the appropriate firmware). Non SDM equipped bodies will just use the usual screw drive AF.

02-25-2008, 10:53 AM   #9
Veteran Member
Ivan Glisin's Avatar

Join Date: Nov 2006
Location: Belgrade
Posts: 656
Original Poster
QuoteOriginally posted by Richard Day Quote
Not neccesarily so, it's not a DA* lens, so I expect that it will "look and feel" very similar to the normal DA lenses. The selection of AF/MF will be done on the body as usual.
Since I don't have a SDM-compatible body and lenses I have a question: is it possible to use AF/MF switch on the body to change focusing mode of a SDM lens? (K10D and DA* owners?) If so what is the purpose of AF/MF switch on DA* lenses, and why DA* SDM lens needs a switch but DA SDM lens does not need one?
02-25-2008, 01:02 PM   #10
Senior Member




Join Date: Sep 2006
Posts: 181
Yes, the switch on the body still controlls AF/MF mode. With the body set to MF, it does not matter what the switch on the lens is set to. The switch on the lens is more of a convience feature. It allows to switch to MF when the body is set to AF without having to remove my hand from the lens, which is a very nice feature.
02-25-2008, 04:15 PM   #11
Veteran Member
Ivan Glisin's Avatar

Join Date: Nov 2006
Location: Belgrade
Posts: 656
Original Poster
QuoteOriginally posted by kbrabble Quote
Yes, the switch on the body still controlls AF/MF mode. With the body set to MF, it does not matter what the switch on the lens is set to. The switch on the lens is more of a convience feature. It allows to switch to MF when the body is set to AF without having to remove my hand from the lens, which is a very nice feature.
Thanks for the clarification. In that case DA17-70 does not need to have an AF/MF switch if I understand well? If so I may be wrong and the lens shown may have been a real DA17-70, although striking similarity to DA16-45 remains intriguing.

We will see this summer I hope.
02-25-2008, 06:25 PM   #12
Veteran Member
clawhammer's Avatar

Join Date: Sep 2007
Location: Logan, Utah
Photos: Gallery
Posts: 976
To me it doesn't make sense having an AF/MF switch on both body and lens, som if pentax leaves it off the 17-70, so much the better.
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!
af/mf, da, da16-45, da17-70, hood, k-mount, lens, logo, mockup, pentax, pentax lens, slr lens, switch
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wedding zoom? Da16-50/Da16-45/Da17-70/Fa28-70/Sigma17-70??? JayR Pentax SLR Lens Discussion 20 03-18-2010 10:30 AM
Send DA17-70 for repair? le_roi_ponpon Pentax SLR Lens Discussion 5 03-07-2010 08:45 AM
DA17-70 - some samples have bayonet sealing, some - not ogl Pentax SLR Lens Discussion 1 12-07-2009 02:48 AM
DA17-70 or Tamron 28-75 for K-7? raider Pentax SLR Lens Discussion 15 08-02-2009 06:04 PM
DA17-70/4 SDM at china take-that Pentax News and Rumors 135 05-26-2008 01:51 AM



All times are GMT -7. The time now is 02:07 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