Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-04-2013, 04:19 AM   #1
Loyal Site Supporter
Fat Albert's Avatar

Join Date: Jul 2013
Posts: 960
Show me your bad DA 15mm Limited Photos

...because I'm about to buy a copy and I really shouldn't!

Seriously, though...I'm shopping for one and the potential sellers have all shown me sample pics that are really soft and mushy in the corners. I know that some copies tend to run soft, but how much is too much?

09-04-2013, 04:43 AM   #2
Veteran Member




Join Date: Oct 2010
Location: Hong Kong
Posts: 327
What f stop are the samples? At f8 i am fine with sharpness across the frame

09-04-2013, 05:20 AM   #3
Pentaxian
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,863
And its ultra wide, I dont think it will show you as much detail and sharpness as a normal prime lens (35mm - 70mm). Also, there is a sample photo search function on this forum, so you can search for photos taken with the 15mm. Of course, they will be processed, so the sharpness there will be better than in the raw data.
09-04-2013, 05:38 AM   #4
Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 5,719
Wider than f/8.0, my DA15 is pretty soft around the edges. The centre is (very) sharp from f/4.0. Beyond f/8.0 the lens is an edge to edge bliss bomb. Don't be put off, just be realistic with your expectations.

09-04-2013, 06:05 AM   #5
Veteran Member
jeztastic's Avatar

Join Date: Nov 2010
Location: Canterbury
Photos: Gallery | Albums
Posts: 596
Depends what you will use if for. If you are going to print big on top quality paper then maybe go for a pro-grade zoom. Otherwise (and looking at the other gear you have, I guess that's not the case), enjoy the small size, great colours and flare resistance.
09-04-2013, 06:17 AM   #6
Veteran Member
demp10's Avatar

Join Date: Jun 2011
Location: Atlanta
Photos: Albums
Posts: 602
If you don't mind manual focus (and for landscapes you set it once and forget it), have you considered the Samyang 14mm F2.8?

If sharpness is your main concern, this is a very sharp lens edge to edge even wide open at F2.8. It is superb at 5.6 and 8.

It does have its issues, heavy and bulky, no filter threads and miss-calibrated distance scale on many samples, but in terms or image quality and price is unbeatable.
09-04-2013, 09:31 AM   #7
Site Supporter
jimr-pdx's Avatar

Join Date: May 2010
Location: 1hr north of PDX
Photos: Gallery | Albums
Posts: 3,550
Five replies and no samples? The mind-control won't allow owners to post 'bad' images
If your budget is tight like mine, maybe give up a mm and grab the DA16-45, also f/4. The question may be valid with it as well though; I don't examine edges closely, and I crop often enough to make it less vital.
09-04-2013, 10:25 AM   #8
Pentaxian
reeftool's Avatar

Join Date: Dec 2007
Location: Upstate New York
Photos: Gallery | Albums
Posts: 8,155
I don't know if I have any "bad" shots that can be blamed on the lens rather than my own mistakes. The statements that the DA15 is "soft" in the edges is a little extreme. It's sharper in the middle but still produces a good overall image. I tried to find some shots of mine that would be a good example but that's really not too easy. First, in most of my shots, the edges are at a different focus distance. Second, since I use my DA 15 mostly for car shows and other events where I need to be close and they are mostly outside in bright sun, I'm stopped down quite a bit to get those famous starbursts in the bright reflections. Stopping down also brings up the diffraction factor. This shot has pretty much the whole car and trailer in the same focus place. If you pixel peep the grass, you can see that the edges aren't as sharp. I really think it isn't too noticeable. Not to me anyhow.


09-04-2013, 10:31 AM   #9
Pentaxian
Cambo's Avatar

Join Date: Dec 2007
Location: Vancouver, BC
Photos: Gallery | Albums
Posts: 864
The bad part about that photo is the copyright notice...

QuoteOriginally posted by reeftool Quote
I don't know if I have any "bad" shots that can be blamed on the lens rather than my own mistakes. The statements that the DA15 is "soft" in the edges is a little extreme. It's sharper in the middle but still produces a good overall image. I tried to find some shots of mine that would be a good example but that's really not too easy. First, in most of my shots, the edges are at a different focus distance. Second, since I use my DA 15 mostly for car shows and other events where I need to be close and they are mostly outside in bright sun, I'm stopped down quite a bit to get those famous starbursts in the bright reflections. Stopping down also brings up the diffraction factor. This shot has pretty much the whole car and trailer in the same focus place. If you pixel peep the grass, you can see that the edges aren't as sharp. I really think it isn't too noticeable. Not to me anyhow.
couldn't you be a little more subtle with it? Wow, is that ever distracting. And how many copyright breaches have you prosecuted? They do virtually NOTHING, except to make the photo incredibly ugly. I make mine small, fade it to 30%, and mount it sideways and out of the way...



Still there, still effective (I guess), but I feel it doesn't destroy the image.

IMHO.

Cheers,
Cameron
09-04-2013, 10:50 AM   #10
Pentaxian
Driline's Avatar

Join Date: Dec 2012
Location: IOWA Where the Tall Corn Grows
Photos: Gallery
Posts: 2,973
QuoteOriginally posted by Cambo Quote
couldn't you be a little more subtle with it? Wow, is that ever distracting. And how many copyright breaches have you prosecuted? They do virtually NOTHING, except to make the photo incredibly ugly. I make mine small, fade it to 30%, and mount it sideways and out of the way...



Still there, still effective (I guess), but I feel it doesn't destroy the image.

IMHO.

Cheers,
Cameron
Nice pic cambo. And your copyright does look good on the side and small like that. Thanks for the pointers.
09-04-2013, 11:38 AM   #11
Pentaxian




Join Date: Nov 2011
Photos: Gallery | Albums
Posts: 3,735
QuoteOriginally posted by Cambo Quote
couldn't you be a little more subtle with it? I make mine small, fade it to 30%, and mount it sideways and out of the way.
Do butterfly fanciers tend to be less larcenous than hot-rodders?
09-04-2013, 11:48 AM   #12
Veteran Member
crewl1's Avatar

Join Date: Jul 2010
Location: Los Angeles, CA
Photos: Gallery | Albums
Posts: 9,797
QuoteOriginally posted by Cambo Quote
Cheers, Cameron
Is this shot with the DA15? If yes, that is cool. I have not seen it used as a macro.
What is the issue with the right wing tip, is it motion blur or out of the focus plane?
09-04-2013, 12:01 PM   #13
Loyal Site Supporter
Fat Albert's Avatar

Join Date: Jul 2013
Posts: 960
Original Poster
QuoteOriginally posted by crewl1 Quote
Is this shot with the DA15? If yes, that is cool. I have not seen it used as a macro.
What is the issue with the right wing tip, is it motion blur or out of the focus plane?
If that pic is shot with a DA 15, it has no business being in this thread
09-04-2013, 08:23 PM   #14
Pentaxian
Kozlok's Avatar

Join Date: Jun 2012
Location: Albuquerque
Photos: Gallery
Posts: 1,792
I don't really understand "soft in the corners" at larger apertures. How often do you photograph flat things at f4? If it's flat, stop it down and use a tripod. If you want larger aperture for DOF control, it's highly unlikely anything will be in the corner and in the focal plane. Like here for example,




The focal plane is on the front of the bridge. The front of the boat is noticeably softer, but still sharp-ish. The extreme corner is pretty soft. It's at f5.6, so it's reasonable to assume that a significant amount of "softness" is just bokeh.

Here I'm stopped down to f8, and I get the magic sunburst, no flare, and still get detail in the shadows, even with the sun in the frame. This is the kind of shot you buy the 15 for, in my humble opinion.




Drop it down to f22 at night on a tripod, and it's still very sharp. Diffraction seems to be kinder to the 15 than some other lenses.


09-05-2013, 02:11 AM   #15
Pentaxian
kh1234567890's Avatar

Join Date: Sep 2010
Location: Manchester, UK
Photos: Gallery
Posts: 2,406
QuoteOriginally posted by Fat Albert Quote
...because I'm about to buy a copy and I really shouldn't!

Seriously, though...I'm shopping for one and the potential sellers have all shown me sample pics that are really soft and mushy in the corners. I know that some copies tend to run soft, but how much is too much?
I don't think that you'll get any help from here. I've been through the same process and after pixel peeping many DA15 full size shots on Flickr I have decided that the corner mushiness and CA, even when stopped down, were just too much to put up with. Obviously all those people posting on Flickr have 'bad' copies.
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!
da 15mm, k-mount, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bad copy of a DA 15mm Limited? sinjin Pentax SLR Lens Discussion 16 09-05-2012 02:20 PM
Photo Story Time documents: Show me your genre study, your reportage, your photo story... etc. christophleipzig Mini-Challenges, Games, and Photo Stories 11 10-15-2011 06:26 AM
Do I have a bad DA* 16-15mm Lens? Please help me determine walay Pentax SLR Lens Discussion 15 05-13-2010 10:41 AM
Show me your DA*300 + 2x teleconverter images netuser Pentax SLR Lens Discussion 8 07-20-2009 01:08 PM
43mm limited - show me your people shots ll_coffee_lP Pentax SLR Lens Discussion 8 07-01-2009 05:35 AM



All times are GMT -7. The time now is 08:31 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