K5 2S moire-Just for the record


Daronl

Link Posted 07/08/2013 - 13:58
Received a Pentax K5 2S yesterday:

Planned a two-day session to test for the potential Moire (yesterday and today),

Checked all apertures on 4 DA* lenses at all speeds and iso 80 - 4000 mixed lighting including back lighting

Subjects

chickens (plumage) - None
weaving - None
Bsket furniture - None
Venetian Blinds - None
Linen - None
Hemp - None
Texture surfaces (Cameras and cmputers) - None
Squirrels (Body fur) - None
Tweed jacket in dull sunlight - None
wire mesh and fences - None

TV screen / and silk - yes (what's new?)

*But surprisingly unobtrusive on the silk and only when the material was incresingly moved more or less from a perpendicular angle to a more acute angle, to the lens centreline - if you know what I mean

apart from the tow notorious subjects " No other Moire" - could be there is a fatal combination tha can work and I will see some, but now I have no hesitation to compliment pentax on a wonderful camera.

Using the K5 2S with DA* 200m- Sharpness would more than challenge a 50mm standard.

Will buy a second body soon

Hope this is a usefull commentary
Quote:


Daronl

johnriley

Link Posted 07/08/2013 - 14:26
Many thanks, I'm sure that moire can be found, but in normal situations it's very unlikely to be a problem.
Best regards, John

pentaxian450

Link Posted 07/08/2013 - 15:10
Moire is very dependent on angle. Something photographed with the camera held level might show moire, but tilting the camera a few degrees will eliminate it.
Yves (another one of those crazy Canucks)

johnriley

Link Posted 07/08/2013 - 15:16
Incidentally, using the GR, which has the same size sensor and also no AA filter, there has been no sign at all of moire.
Best regards, John

froeschle

Link Posted 07/08/2013 - 15:46
Quote:
Incidentally, using the GR, which has the same size sensor and also no AA filter, there has been no sign at all of moire.

I am a bit astonished to read this.

See e.g. http://www.dpreview.com/previews/ricoh-gr/9 - "Ricoh GR - F2.8, 100% center crop"
(http://4.static.img-dpreview.com/previews/ricoh-gr/samples/testscene/RicohGR-F28-003.jpg?v=2389)

Quote:
both cameras are exhibiting extensive moiré as a result of their sharp lenses and lack of anti-aliasing filters

johnriley

Link Posted 07/08/2013 - 16:01
In what way are you astonished?

If you seek moire you will find it, if you just go out and shoot normal images you are highly unlikely to find it's a problem.
Best regards, John

froeschle

Link Posted 07/08/2013 - 16:18
Quote:
In what way are you astonished?

It might be questionable whether or not color moiré is a problem for most pictures. However, it also might be disputable whether the absence of an AA filter really is desirable (an advantage). But this is not my point.

Knowing you as an expert and experienced "tester", I was just surprised by the absoluteness of this statement
Quote:
using the GR, which has the same size sensor and also no AA filter, there has been no sign at all of moire

especially as e.g. dpreview finds "extensive" moiré.

johnriley

Link Posted 07/08/2013 - 16:35
I was reporting what I found in normal use, and I'm happy to confirm that is what I found in normal use.

If and when I do observe some moire, I'll let you know!
Best regards, John

Algernon

Link Posted 07/08/2013 - 18:52
The rigging on yachts in a boatyard should be a good test.

As usual RH always has it covered .....

http://ricehigh.blogspot.com/2013/04/dc-watch-k-5iis-vs-k-5-shootout-test.html

Go to the DC Watch link and DL say the two f/8 files of the
building (file no.s 23 and 30). There's a vertical feature on
the building running full height about 1/3rd in from the left,
that looks completely different due moire. For that reason
I wouldn't use the K-5iiS for architectural work. It looks
excellent on the trees and grass and should be excellent for
landscapes.

Might be OTT but of you enlarge the two files to 400% the moire
is clearly visible on the window cills of the K-5iiS.

I did resize these two to 1280w using Resize Magic and apart from
the better colour of the trees and grass there isn't much in it
between the two cameras apart from the vertical feature
being obviously different.

The 40mm lens isn't very impressive.

'
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 07/08/2013 - 18:57

Tyr

Link Posted 19/08/2013 - 17:56
If you use Lightroom 4 or 5 they have a moire removal brush. never had a chance to test it though. should dig out the K10D and test it.
Regards,
Dan

https://www.flickr.com/photos/honourabletyr/

Daronl

Link Posted 16/09/2013 - 15:05
Three weeks in Asia ( Borneo) with a K5 IIs - no moire, zero, zilch
Daronl

davidstorm

Link Posted 16/09/2013 - 21:02
Daronl wrote:
Three weeks in Asia ( Borneo) with a K5 IIs - no moire, zero, zilch

I hope Algi and Smeggy don't see this update they will be suicidal

Cheers
David
Flickr

Nicola's Apartments, Kassiopi, Corfu

Some cameras, some lenses, some bits 'n' bobs

Smeggypants

Link Posted 16/09/2013 - 23:01
I never saw moire as being a problem worth worrying about in an AA Filterless camera. Easily removable in Lightroom if on teh odd occasion it does appear
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283

johnriley

Link Posted 16/09/2013 - 23:34
MrS, I appreciate your comment and it's saved me from feeling like that bowl of petunias....
Best regards, John

andrewk

Link Posted 17/09/2013 - 00:43
I suspect that you can find moire in images from many digital cameras even if they do have an AA filter - if you look hard enough.

This is a small crop from an image taken by a K200D with a 18-55mm kit lens.




Andrew
Flickr photostream
Last Edited by andrewk on 17/09/2013 - 00:44
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