Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-04-2008, 11:13 AM   #1
Veteran Member
OrenMc's Avatar

Join Date: Apr 2008
Location: USA
Photos: Gallery
Posts: 1,902
Focusing issue?

I am new to the d-slr thing and have had my K10d only since Feburary but I have been struggling from the beginning to get a good sharp photo. There were two things I have been looking at which are user error and the known fact that the K10d needs PP or custom setting +2 sharpness 1+ contrast. But I still don't get the truely sharp pictures I know this camera is capable of.
I do a lot of manual focus ( one of the reason I thought it was user error ) macro/closefocus but the Tamron 90 2.5 doesn't put out the photos I know it can. I know it takes a lot of practice which I do but still..... I have tried tripod, self timer and other lenses with autofocus and let the camera do all the work.
Some of the pictures look fine when I first download but as soon as I try to zoom I loose detail fast. Even after PP I have very little detail. I have been thinking all along it was that the pictures were just soft but I am beginning to think it is a focusing issue.
What is a really good way to test the focus and how to tell the difference between soft and out of focus?

Thank all, Oren

05-04-2008, 11:15 AM   #2
Veteran Member
MJB DIGITAL's Avatar

Join Date: Jul 2007
Location: st. louis
Posts: 1,173
is it possible to post a couple?

when you zoom it to check the detail, how much are you zooming?

i dont really run camera tests but im sure someone here will tell you about some chart tests or newspaper tests.....

good luck
05-04-2008, 11:31 AM   #3
Veteran Member




Join Date: Aug 2007
Photos: Gallery
Posts: 1,563
QuoteOriginally posted by MJB DIGITAL Quote
is it possible to post a couple?

when you zoom it to check the detail, how much are you zooming?

i dont really run camera tests but im sure someone here will tell you about some chart tests or newspaper tests.....

good luck
If you do post photos, please add exif info (shutter speed, ISO, aperture, etc) and the type of lens you are shooting?

- Bert
05-04-2008, 11:34 AM   #4
Veteran Member
OrenMc's Avatar

Join Date: Apr 2008
Location: USA
Photos: Gallery
Posts: 1,902
Original Poster
http://http://www.flickr.com/photos/33427578@N00/
I did a lens test a little will back but these are a few of the better ones.

05-04-2008, 11:38 AM   #5
Veteran Member




Join Date: Aug 2007
Photos: Gallery
Posts: 1,563
QuoteOriginally posted by OrenMc Quote
http://http://www.flickr.com/photos/33427578@N00/
I did a lens test a little will back but these are a few of the better ones.
Unfortnatly the maximum resolution on your flickr site is only 800x558 pixels.
Judging from this I don't see what is wrong.
Nice Seattle photos by night though.

- Bert
05-04-2008, 01:17 PM   #6
Veteran Member
OrenMc's Avatar

Join Date: Apr 2008
Location: USA
Photos: Gallery
Posts: 1,902
Original Poster
Here is a shot today. I had it on a tripod. Quanatary 70-300 ( not the best lens I know but ) Green mode @ F 4.5 1/4 sec ISO 100 I also kow I probably should have raised my ISO to increase shutter speed but I did have it on a tripod.

Last edited by OrenMc; 06-06-2008 at 05:10 AM.
05-04-2008, 01:25 PM   #7
Veteran Member




Join Date: Sep 2006
Location: Virginia Beach VA USA
Photos: Gallery
Posts: 1,364
Do you shoot in AV mode?

Watch your shutter speed. You shot this at 1/4 sec @ 180mm. SR is good, but not THAT good. . The rule of thumb for shutter speed with out stabilization is 1/ the focal length x crop factor, or in your case 1/(180x1.5) , or 1/270 sec. If you are really steady and have a subject that is standing still, you can get 2-3 additional stops, or about 1/60 sec. If you have a subject in motion, you need a higher shutter speed.

Learn to balance your shutter speed to aperture to ISO speed, and you will find yourself doing much better.
05-04-2008, 05:25 PM   #8
Veteran Member
MJB DIGITAL's Avatar

Join Date: Jul 2007
Location: st. louis
Posts: 1,173
i would guess that you have some camera shake going on, but of course, that is just a guess.

another possibility could be that your blur is an effect of having SR activated while on a tripod, but I dont know if you had it on or not.

and yes, get your shutter speed up. a quarter of a second wont do for anything really unless everything in the frame is stationary or you are doing something (art) that wants to be shot at that speed.

mitch

05-04-2008, 06:29 PM   #9
Ole
Administrator
Ole's Avatar

Join Date: Sep 2006
Location: Copenhagen, Denmark
Photos: Gallery | Albums
Posts: 3,917
Use a smaller aperture. If f/4.5 is near or at the max for the lens it won't be at its best.

Use the 3 seconds selftimer when you're on a tripod. That does two things: Turns off SR if you should have forgotten to(you don't need SR on a tripod) and flips the mirror up 3 seconds before exposure thus eliminating unsharpness from the mirror slap.

Try another lens.
05-04-2008, 06:48 PM   #10
Veteran Member




Join Date: Sep 2006
Photos: Gallery
Posts: 5,713
QuoteOriginally posted by OrenMc Quote
Here is a shot today. I had it on a tripod. Quanatary 70-300 ( not the best lens I know but ) Green mode @ F 4.5 1/4 sec ISO 100 I also kow I probably should have raised my ISO to increase shutter speed but I did have it on a tripod.
The bird would have moved during a 1/4 second shutter speed, so this isn't a fair test
05-04-2008, 06:56 PM   #11
New Member




Join Date: Apr 2008
Location: texas hill country
Posts: 16
QuoteOriginally posted by little laker Quote
The bird would have moved during a 1/4 second shutter speed, so this isn't a fair test
but then the post the bird was perched on would have been in focus if the bird had moved
05-04-2008, 07:01 PM   #12
Veteran Member




Join Date: Sep 2006
Photos: Gallery
Posts: 5,713
If he focused on the post
05-05-2008, 05:42 AM   #13
Veteran Member
OrenMc's Avatar

Join Date: Apr 2008
Location: USA
Photos: Gallery
Posts: 1,902
Original Poster
No this isn't a good example of what I am having issuses with. This one is SR, but thanks for the help. I'll try another one this evening.
05-05-2008, 07:14 AM   #14
Veteran Member




Join Date: Sep 2006
Photos: Gallery
Posts: 5,713
OrenMc, I've seen several people using plastic toys as models. And they're almost the perfect subject.
They don't move, and have nice sharp edges to start with.

Stuffed animals just have too much fir for an accurate assessment.
05-06-2008, 05:24 AM   #15
Veteran Member
OrenMc's Avatar

Join Date: Apr 2008
Location: USA
Photos: Gallery
Posts: 1,902
Original Poster
Good idea little laker, I'll give it a whurl.
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!
camera, detail, error, focus, k10d, lot, photography, pictures, pp, user
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vivitar MC Tele Converter 2X PK-A/R-PK issue...or no issue? WiseOx Pentax SLR Lens Discussion 5 06-11-2014 01:14 PM
An expensive way to find that your camera has a focusing issue sterretje Photographic Technique 0 01-06-2010 10:01 AM
Back focusing AF lens an issue on MF film bodies? RichyX Pentax Film SLR Discussion 6 11-11-2009 01:38 PM
Front-back focusing issue Mystic Pentax DSLR Discussion 10 08-26-2009 08:15 PM
Tamron 28-75mm f/2.8 Focusing Issue Scout Pro Pentax SLR Lens Discussion 3 04-15-2008 07:46 PM



All times are GMT -7. The time now is 05:20 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