Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-04-2010, 03:46 PM   #1
Junior Member




Join Date: Apr 2010
Location: CT
Photos: Albums
Posts: 41
Image lack sharpness - Pentax K-x with 18-55mm lens

Dear All,

I own a Pentax K-x with 18-55 mm lens. I feel the images are not sharp when compared with Canon XSI. Please share your thoughts on this.

As I cannot upload the original image, I have uploaded the resized image for your reference.

Thanks in advance.

Regards,
Krishna

Attached Images
         

Last edited by krishna; 04-05-2010 at 11:23 PM.
04-04-2010, 05:13 PM   #2
Veteran Member




Join Date: Nov 2009
Location: Pittsburgh, PA
Posts: 479
The kit lens is pretty soft at lower apertures. Try stopping down to f/8-f/12.
04-04-2010, 05:51 PM   #3
Senior Member




Join Date: Feb 2010
Photos: Albums
Posts: 264
bad focus perhaps? the kit lens is pretty sharp even at wide open IMO
04-04-2010, 07:08 PM   #4
Veteran Member
rustynail925's Avatar

Join Date: Aug 2009
Location: Philippines
Photos: Gallery
Posts: 1,552
To me the pictures 1 & 3 are not in focus

#2 is ok.

04-04-2010, 07:38 PM   #5
Veteran Member




Join Date: Mar 2007
Location: Toronto (for now)
Posts: 1,749
QuoteOriginally posted by rustynail925 Quote
To me the pictures 1 & 3 are not in focus

#2 is ok.
Yes, correct. Not to mention the first screams low light and I would hazard a guess, camera shake.
04-04-2010, 07:38 PM   #6
Forum Member
nicholas621's Avatar

Join Date: Sep 2009
Location: New York
Posts: 51
#1 and #3 look like is not in focus . Did you use auto 5 or auto 11 af points?

#2 is just a tad out of focus .
04-04-2010, 11:03 PM   #7
Senior Member




Join Date: Mar 2010
Location: Botosani
Photos: Gallery | Albums
Posts: 271
I also have a K-x and used 18-55 (newbie, first DSLR) and i liked so far the pictures, this is my mother's evil cat (though you can't tell from picture how crazy is), don't think is soft (maybe other mistakes i'm not aware).
04-05-2010, 01:04 AM   #8
Pentaxian
Pablom's Avatar

Join Date: Feb 2010
Location: Jerusalem
Posts: 1,940
can you post some of the Canon shot you compare with? and exif

04-05-2010, 01:35 AM   #9
Veteran Member




Join Date: Dec 2009
Location: Forbes Central West NSW
Posts: 311
that is one evil looking pussy cat
cheers
Jan
04-05-2010, 07:01 AM   #10
Veteran Member




Join Date: Dec 2009
Location: Ontario
Posts: 550
In my honest opinion. None of those pictures are in focus. Even wide open the picture sharpness should be a lot better than the ones posted. I would guess that the images taken are not in focus. Even the 2nd one is only slightly focused even then it's not close to being right. Are you sure your allowing enough time for the camera to focus? You should see a hexagonal shape in the viewfinder when it is focused or an audible beep (if enabled).
04-05-2010, 09:31 AM   #11
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
I'd say *parts* of all those pictures are in focus - just not the parts you probably wanted to be in focus. Cameras don't read minds - if you are going to shoot with shallow depth of field (as you are doing when you shoot with a large aperture), you need to be careful to control exactly where the camera focuses - either by selecting a focus point yourself or by simply doing it manually.

The first shot actually isn't bad - part of the snake looks in focus to me. The DOF is just so shallow you can't really tell - plus it's overexposed, and you're losing detail as a result.
04-05-2010, 12:39 PM   #12
Junior Member




Join Date: Apr 2010
Location: CT
Photos: Albums
Posts: 41
Original Poster
Thank you all for your inputs.

I will get the Canon pictures uploaded.

- Whenever the subject is in focus, I could here the beep sound.

- The first image was taken through a glass window.
- The second image the flowers was at a distance. I mean not too close.
- The third image it was bright sunlight

Thanks for the uploaded image of the cat. This confirms I am doing something seriously wrong. I need to do more homework.
04-05-2010, 12:55 PM   #13
Ash
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,695
krishna,
You should review your focusing technique and understand how your camera locks focus.
If you don't understand why #1 shows the snake out of focus while the wall behind it is in focus, and #2 shows the small bridge area in the bottom foreground area of the image in focus and the rest not, then you should go back to the beginning and learn about camera focus points, aperture, focus distance and their relation to sharpness and depth of field.
04-05-2010, 01:32 PM   #14
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,484
QuoteOriginally posted by StepOne Quote
I also have a K-x and used 18-55 (newbie, first DSLR) and i liked so far the pictures, this is my mother's evil cat (though you can't tell from picture how crazy is), don't think is soft (maybe other mistakes i'm not aware).
[IMGtall]http://img243.imageshack.us/img243/7403/catyy.jpg[/IMGtall]

If that isn't a WTF are You looking at look, I don't know what is

04-05-2010, 07:16 PM   #15
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
QuoteOriginally posted by krishna Quote
- Whenever the subject is in focus, I could here the beep sound.
you mean, whenever *something* is in focus. No guarantee it's the specific part of the scene you cared about. Sounds like you are expecting the entire scene to always be in focus. You should Google the term "depth of field" to understand how little of a scene will actually be in focus at once, and how important it is that you control *exactly* which part of the scene is in focus, and also how to control how much of the scene is in focus.
Reply
« Raw | SDHC cards »

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!
camera, image, k-x, k-x with 18-55mm, lens, pentax, pentax help, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax lack of scene mode splurf Troubleshooting and Beginner Help 52 11-30-2009 06:03 PM
Fine Sharpness in Custom Image on K200D MoiVous Pentax DSLR Discussion 9 08-03-2009 11:21 AM
Does ISO affect Image Sharpness? philbaum Pentax DSLR Discussion 2 06-16-2009 07:08 PM
Differing level of sharpness in the same image matiki Photographic Technique 12 07-03-2008 02:31 PM
For Sale - Sold: FS: Kit Lens DA 18-55mm, 52mm B+W filters and Image Doctor Software (budled or azcavalier Sold Items 0 10-25-2007 07:24 AM



All times are GMT -7. The time now is 08:24 PM. | 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