Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-16-2011, 07:33 AM   #1
Banned




Join Date: May 2011
Location: Pittsburgh,PA
Posts: 321
Upgrade to K5, Change my Lens or Switch to CANON/NIKON

Hello Pentaxian,

I have a Pentax K7 with sigma 17-70mm lens. I don't think I'm getting very sharp images. I haven't tried DA or DA* at all. do you guys think it's b/c of the lens and I should try Pentax ones ( I was actually thinking of getting 50-135mm DA*) / should I step up to K5 or should I switch to Nikon and Canon since I don't have a collection of Pentax Lenses to get stuck to one brand? thanks.


Dr_romix


05-16-2011, 07:36 AM - 1 Like   #2
Forum Member
Edmund's Avatar

Join Date: May 2010
Location: Kentucky
Posts: 57
My Sigma 17-70mm produces very sharp images. Did you adjust the AF for the lens?
05-16-2011, 07:51 AM   #3
Veteran Member




Join Date: Mar 2009
Location: Ohio, USA/ India
Photos: Gallery
Posts: 474
Please post sample images with EXIF so we can see what problem you are facing. As edmund wrote some things can be fixed with lens adjustments.
05-16-2011, 07:57 AM   #4
Veteran Member
liukaitc's Avatar

Join Date: Jul 2010
Location: New York
Photos: Albums
Posts: 1,008
Funny. I just saw this exact post on Amazon.

I think you should post some unsharp photo here.
Besides do not think this way that your photo can improve signficately just by upgrade camera or change brand.

05-16-2011, 08:42 AM - 1 Like   #5
Pentaxian
RonHendriks1966's Avatar

Join Date: Jan 2009
Photos: Gallery
Posts: 8,714
I think you should go to a course to learn how to make photo's.
05-16-2011, 09:03 AM   #6
Veteran Member




Join Date: Feb 2010
Photos: Gallery | Albums
Posts: 971
you shouldn't give up on pentax yet, and i don't think you should just jump into a k5. the k7 is a very capable camera body. Perhaps the focus is off and you should do a micro adjustment of the focal distance.

And you have to at least try out one DA or DA* lens. The beautifully made primes are one of the biggest reasons to stick with Pentax.
05-16-2011, 09:09 AM   #7
Banned




Join Date: May 2011
Location: Pittsburgh,PA
Posts: 321
Original Poster
QuoteOriginally posted by Edmund Quote
My Sigma 17-70mm produces very sharp images. Did you adjust the AF for the lens?
WHat do you mean by adjusting AF for the lens? it's on AF with OS off..
05-16-2011, 09:15 AM   #8
Senior Member
Mr. B's Avatar

Join Date: Jan 2009
Location: Varaždin, Croatia, Europe
Photos: Gallery
Posts: 272
It would really help if you posted some photos you're not satisfied with
K-7 and the Sigma 17-70 are a very good combination capable of making fine photos.

05-16-2011, 09:17 AM   #9
Banned




Join Date: May 2011
Location: Pittsburgh,PA
Posts: 321
Original Poster
QuoteOriginally posted by Eagle_Friends Quote
you shouldn't give up on pentax yet, and i don't think you should just jump into a k5. the k7 is a very capable camera body. Perhaps the focus is off and you should do a micro adjustment of the focal distance.

And you have to at least try out one DA or DA* lens. The beautifully made primes are one of the biggest reasons to stick with Pentax.
Thanks buddy for the feedback.. I'll try 50-135 DA*
05-16-2011, 09:19 AM   #10
Pentaxian
JohnBee's Avatar

Join Date: Sep 2008
Location: front of computer
Posts: 4,620
QuoteOriginally posted by dr_romix Quote
WHat do you mean by adjusting AF for the lens? it's on AF with OS off..
I think he means calibrating the AF for that particular lens.
There is an option in the menu that allows for micro-adjustments for auto focus lenses. And so a good start might be to establish if this is either on /off etc.

But perhaps the quickest way to help establish what's going on is to post some images(with EXIF) so people can look at the results and help figure this out.
05-16-2011, 09:21 AM   #11
Banned




Join Date: May 2011
Location: Pittsburgh,PA
Posts: 321
Original Poster
I will post some portrait I took with a friend of mine in studio. same lighting. she was using Canon 5D markII with Canon 24-105mm lens and mine was Pentax K7 with Sigma 17-70. Significant different comparing RAW files with 100% crop. I still don't think because hers was FF camera, the IQ should be substantially different.
05-16-2011, 09:37 AM   #12
Banned




Join Date: May 2011
Location: Pittsburgh,PA
Posts: 321
Original Poster
here is the link I posted some pics. will add more later. thanks for the feedback.Flickr: dr_romix's Photostream
05-16-2011, 09:43 AM   #13
Pentaxian




Join Date: Mar 2009
Location: Perth Australia
Photos: Albums
Posts: 1,511
if your looking at 100% crops then the full frame camera will always win.
you should buy a Pentax 645d because its sharper than any full frame camera.

If looking at 100% crops is how you judge a good photo that will be always be the case as to which photo you think is best.

Of course being sharpest at 100% does not make it a good photo and maybe your getting fixated on one variable for no good reason.
05-16-2011, 09:47 AM   #14
Veteran Member
liukaitc's Avatar

Join Date: Jul 2010
Location: New York
Photos: Albums
Posts: 1,008
QuoteOriginally posted by dr_romix Quote
here is the link I posted some pics. will add more later. thanks for the feedback.Flickr: dr_romix's Photostream
umm, just a quick glance can see some are not sharp (but not all of them) which should not be like this. I think they are not focused or perheps the shutter speed is too slow so you get blurry photo.
05-16-2011, 09:56 AM   #15
Veteran Member




Join Date: Mar 2009
Location: Midwest
Photos: Gallery
Posts: 1,407
QuoteOriginally posted by dr_romix Quote
here is the link I posted some pics. will add more later. thanks for the feedback.Flickr: dr_romix's Photostream
I looked at five or six of them. A couple are clearly back focused, a couple have motion blur. I didn't see any sharp ones.

Calibrating the AF on your lens might help. Switching brands might help if you get a body and lens that are calibrated together on the first try, but if you get this lens set up properly and control camera shake, you'll get sharp images.
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, da*, dslr, k-5, k-5 ii, k-5 iis, k5, lens, pentax, pentax k-5, switch
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is in-body SR worth the switch from Nikon to Pentax for low light? nsfx Pentax K-5 72 12-16-2010 07:31 AM
Struggling with the switch from canon ps to pentax kx junerainbow Troubleshooting and Beginner Help 7 10-08-2010 11:07 AM
Possible switch from Canon...recommendations str8talk83 Pentax DSLR Discussion 39 09-22-2010 03:15 PM
Pentax vs Nikon vs Canon - A Lens System Comparison cputeq Pentax SLR Lens Discussion 46 05-20-2010 06:09 PM
Thinking to change from Nikon to Pentax kwetiaw Pentax DSLR Discussion 22 10-20-2009 07:49 AM



All times are GMT -7. The time now is 02:58 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