Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-15-2020, 11:49 AM   #1
New Member




Join Date: Apr 2018
Location: Orlando, Florida
Posts: 15
Gritty results-K1mk2 pictures with 560mm

Ok so this is driving me nuts but am I missing something? My wildlife photos from my k1mk2 when using the 560mm don't seem as sharp as they should be (perfect lock on in auto, dead on in manual). While I'm no Morten Hilmer (watch him on youtube) it seems as though I should be getting at least as clear results as him. Maybe I am being dumb and missing something however the photos from my 560 especially- seem so gritty. Photos from my other lenses (55-300, manual 50mm, 18-55 etc ) still seem gritty but not nearly as bad.

Attached Images
View Picture EXIF
K-1 Mark II  Photo 
10-15-2020, 12:00 PM   #2
Site Supporter
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Washington Cascades
Photos: Gallery | Albums
Posts: 12,337
I am certainly no long lens expert but here are a few thoughts:
- are you using a tripod? If so is image stabilization off?
- if not on a tripod 1/320 of a second is much too slow for me to be able to get solid images
- have you fine tuned the focus on the lens?
- a 'perfect' lock in auto is still going to be a large area at that range. Possibly enough to catch the nose or ear rather than the eye.
- dead on in manual is reliant on the diopter being correctly adjusted for your eye

The image is too low a resolution as uploaded for me to really tell much. It is of course also quite dark which might be part of the problem. I suggest you do some tests using live view to focus on a well light target and compare that image to ones taken using manual and auto focus through the viewfinder. All on a tripod and all without moving anything. It might give you some information on what is going on.
10-15-2020, 12:02 PM   #3
Loyal Site Supporter
Loyal Site Supporter
KiloHotelphoto's Avatar

Join Date: Jan 2015
Location: Glen Mills, PA
Photos: Albums
Posts: 770
From my experience it’s just not that good of a lens. I owned it for a couple years before moving on to Canon for my wildlife shooting with a 600 F4 IS II. You can’t compare the two and I’m sure it’s similar to Mortens Nikon 600/4. They are just in another league.
10-15-2020, 12:14 PM   #4
Loyal Site Supporter
Loyal Site Supporter
BigMackCam's Avatar

Join Date: Mar 2010
Location: North-East of England
Posts: 15,240
Hi Tim - looking at the photo provided, I can't see what you mean by "gritty". I interpret "gritty" as noisy, and nothing to do with sharpness...

The deer, plus the grass and overhead twigs in the focal plane, look sharp as a razor to me at this size of image, and I don't see much in the way of noise.

Could you provide a link to the full size image, or a 1:1 crop of an area you feel shows this gritty effect?

I note the photo was shot at f/5.6 (i.e. wide open). You'll improve resolution by stopping down to f/8. I realise this isn't ideal if you want to keep your ISO and/or shutter speed up, but it's the way with almost every lens that you need to stop down somewhat for best resolution.

Have you carried out AF fine tuning to ensure AF is absolutely spot-on for the lens? At this sort of focal length, depth of field at f/5.6 is very shallow...

10-15-2020, 12:15 PM   #5
Site Supporter
Site Supporter
MossyRocks's Avatar

Join Date: Nov 2017
Location: Minnesota
Photos: Gallery | Albums
Posts: 1,607
From looking as closely as I can at the supplied image it looks like it is back focusing a little bit. the blades of grass a bit behind the deer look sharper to me. Were you shooting off of a tripod? If not I would start there and manually focus in magnified live view for the best results since the viewfinder doesn't' have any focusing aids.

I would suggest going to park that has a baseball diamond and go stand out in the outfield on a sunny day with the lens on a big tripod. The do the fine focus adjustment for the lens on the fence behind home plate. That makes a great target and you will be fairly far back. Also keep in mind that wide open 560mm even at a bit of distance it has a fairly narrow depth of field. Stopping it down some will help and the farther away and more stopped down you are the better chance of getting that perfect focus but you will need a lot of light, sitll target or a quality eating high ISO.

If I use 500mm f/5.6 and a distance to subject of 100 feet the DoF is under 3 feet so being at 560mm it would be slightly narrower. So it would be easy to miss the focus by a bit.
10-15-2020, 12:24 PM   #6
New Member




Join Date: Apr 2018
Location: Orlando, Florida
Posts: 15
Original Poster
Yes shot on tripod, however everything else all have said leans to practice makes perfect. Aka get better lol...thanks to you all. I'll take all the above suggestions and run with them.
10-15-2020, 12:45 PM   #7
Pentaxian




Join Date: May 2016
Photos: Gallery | Albums
Posts: 2,536
I'd imagine dof is pretty thin with such long lenses. I would suggest maybe trying to test it with a still subject at the same distance, a solid tripod, live view to ensure perfect focus, and a rather high shutter speed to beat any vibrations. If the lens shows better results in that scenario, then it might need some af calibration and maybe more shutter speed.
10-15-2020, 12:47 PM   #8
Pentaxian
swanlefitte's Avatar

Join Date: May 2015
Location: New Orleans
Photos: Gallery
Posts: 3,278
It looks like the dear was about 100 meters judging by the size if the width isn't cropped. DOF should be a good 11 meters. is shake reduction turned off for tripod shooting?

10-15-2020, 12:58 PM   #9
Loyal Site Supporter
Loyal Site Supporter
BigMackCam's Avatar

Join Date: Mar 2010
Location: North-East of England
Posts: 15,240
QuoteOriginally posted by swanlefitte Quote
It looks like the dear was about 100 meters judging by the size if the width isn't cropped. DOF should be a good 11 meters. is shake reduction turned off for tripod shooting?
At 100 metres, depth of field for this setup - K-1 MkII in APS-C mode (which I assume is the default?) with DA560 @ f/5.6 - is 7.18m... and remember, that's just talking about how much of the image is in acceptable focus, not precise focus...
10-15-2020, 02:40 PM   #10
Pentaxian
swanlefitte's Avatar

Join Date: May 2015
Location: New Orleans
Photos: Gallery
Posts: 3,278
QuoteOriginally posted by BigMackCam Quote
At 100 metres, depth of field for this setup - K-1 MkII in APS-C mode (which I assume is the default?) with DA560 @ f/5.6 - is 7.18m... and remember, that's just talking about how much of the image is in acceptable focus, not precise focus...
If its in crop mode then it is about 67 meters which is DOF of only 3 meters. still a deer is only about a half meter wide.
there are several deer around here. I am judging by a few weeks ago I took a picture of a deer from about 30-40 meters away at 322mm in crop mode and how much frame it filled.

opps that is about 150meters on full frame if a deer is 2 meters across then the field of view is about 10 meters. in crop more like 225 meters. https://www.pointsinfocus.com/tools/depth-of-field-and-equivalent-lens-calcu...2}],%22m%22:1}

Last edited by swanlefitte; 10-15-2020 at 08:32 PM.
10-15-2020, 02:57 PM   #11
Pentaxian




Join Date: Jan 2016
Posts: 380
When I use Sigma 150-500@500, I would consider 1/320s to be rather long exposure, even with Sigma's image stabilizer. Moreover, deer's hind leg looks blurred to me, what suggest a movement. Last, but not least, grass and branches at the top look sharp, what is quite strange, as usually sharpness decreases to edges of a picture. If it were my lens, I would test it on a tripod with static subjects to eliminate hand shake, movement blur, and to verify for possible back/front focus.
10-15-2020, 03:05 PM - 1 Like   #12
Site Supporter
Site Supporter




Join Date: Dec 2015
Photos: Gallery | Albums
Posts: 892
At the distances which swanlefitte calculated, movement in the air may have contributed some blur at 1/320 s.
10-15-2020, 08:35 PM   #13
Pentaxian
swanlefitte's Avatar

Join Date: May 2015
Location: New Orleans
Photos: Gallery
Posts: 3,278
QuoteOriginally posted by JensE Quote
At the distances which swanlefitte calculated, movement in the air may have contributed some blur at 1/320 s.
At that distance a tripod needs to be excellent and air can diffract.
10-16-2020, 08:16 AM - 1 Like   #14
Pentaxian
Wheatfield's Avatar

Join Date: Apr 2008
Location: The wheatfields of Canada
Posts: 12,360
QuoteOriginally posted by Tim_RichertImages Quote
Yes shot on tripod, however everything else all have said leans to practice makes perfect. Aka get better lol...thanks to you all. I'll take all the above suggestions and run with them.
Are you using a "protective filter"?
10-16-2020, 08:58 AM   #15
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 35,978
We need a 1:1 crop of the deer and a list of settings. Since pretty isn't photographic terminology, we're kind o guessing what it means.

Particularly I'd be interested in the EV setting. What I'm seeing is a slightly backlight situation that probably needed a plus .3 EV setting at least maybe more. The EV setting is more critical at 800 ISO as you've already clipped 3 stops off the bottom of the captured image. When your subject is in shadow and you've gone minus EV, expect noise. But I'm just guessing.. Your image doesn't define the issue.
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!
24x36mm, 560mm, full-frame, pentax, photos
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: HD Pentax-DA 560mm ED AW Joshua A Sold Items 5 04-21-2020 05:57 PM
Astro i make a videro for pentax k1mk2 astrotraer pzman3d Photographic Technique 4 12-27-2019 12:33 PM
DA*11-18mm/F2.8 on PENTAX K1mk2 (FF MODE Vignetting TEST) pzman3d Pentax SLR Lens Discussion 9 03-05-2019 05:43 AM
People Light Tree & Gril ( Pentax K1mk2 + D.FA* 50mm/F1.4) pzman3d Post Your Photos! 0 12-27-2018 06:10 AM
How long K1 to K1mk2 takes i83N Pentax K-1 4 07-15-2018 07:57 PM



All times are GMT -7. The time now is 04:34 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