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04-21-2013, 09:37 AM   #1
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K-01 sharper than k-5?

This is just my first subjective impression as I haven't done a controlled test yet, but it seems like so far with my da*16-50 and 55-300 the k-01 pictures came out noticeably sharper than those with the k-5. Both shooting in raw and jpeg. The 16-50 especially is razor sharp on the k-01, not so much on the k-5.
Has anyone else noticed this? Could there be a reason other than user error?

04-21-2013, 09:40 AM   #2
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It could be that the K-01 using contrast detect AF is more accurate than your k-5.
04-21-2013, 09:41 AM   #3
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CDAF vs PDAF?
04-21-2013, 10:00 AM   #4
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I noticed the same thing right away when I got my K-01 last year, and having a k5 as well at the same time. I think the most likely explanation is a lighter anti-aliasing filter in the K-01. Just pure speculation on my part.

04-21-2013, 10:38 AM   #5
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There was a thread on this some time ago. The conclusion is that the K-01 has a lighter (or missing?) filter. Highpass, AA, some sort of filter on the sensor that normally prevents moire but also reduces sharpness.
They probably did that so that CD AF would work better, since higher sharpness also means higher contrast and therefore better focus detection. And I assume that this has led to the K-5IIs, because the 'test' with the K-01 was successful. It would be interesting to see a controlled comparison between K-5, K-01, K-30, and K-5IIs. All with the same lens/aperture.
04-21-2013, 12:39 PM   #6
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QuoteOriginally posted by ChatMechant Quote
This is just my first subjective impression as I haven't done a controlled test
When you do the test, use live view on the k-5 -- that'll put you on the level playing field as then you'll be using CDAF on both. I suspect you'll find very little, if any, difference in apparent sharpness.
04-21-2013, 01:40 PM   #7
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I didn't know that about the k-01 missing the filter. At first I thought maybe it was because there's no mirror in the k01. hopefully I'll get a minute later to do a quick test
04-26-2013, 09:44 PM   #8
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Finally got that minute. Did some other testing too since I had my tripod setup- the da 55-300 vs da* 50-135 with very interesting results. Anyway here is the k-01 and k-5 with the da40xs @ f5.6 I did shots with the k-5 with PDAF and CDAF, but the CDAF ones didn't come out at all and I didn't feel like redoing everything. Sorry for the subject not being a test chart. It's what I had handy.

K-5:



and K-01:



2sec timer, RAW, used the snip tool while viewing at %100 in LR. So these are %100 crops.






04-27-2013, 11:45 AM   #9
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QuoteOriginally posted by ChatMechant Quote
At first I thought maybe it was because there's no mirror in the k01.
The mirror wouldn't affect IQ because it moves out of the way. It could cause vibrations, but they should be negligible.
And I think your test shows the K-01 as being a little sharper, no? If the focus and settings were equal in both of the test photos
04-29-2013, 05:42 AM   #10
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QuoteOriginally posted by JinDesu Quote
It could be that the K-01 using contrast detect AF is more accurate than your k-5
I have the following items for comparison; having presently - a Pentax K-01, (the original) K-5, and also a K-5lls.

And whether using auto focusing or even complete manual settings... The K-01 does in fact produce better images than the original model K-5, better stills and also far better video; especially considering that the original K-5 was "gravely" impacted by video sensor burn issues. But then again, the newer K-5 models (including the K-5lls) both do produce better than the other two models mentioned; the K-01 and also the original K-5.
05-06-2013, 06:09 AM   #11
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You "might" need to adjust the focus settings on the K-5 ... but it's hard to tell from what you've posted. I know that my K-7 had to have the focus fine-tuned when using the DA* 55 and FA77. The K-01 with it's CDAF didn't need any adjustment and just captured razor-sharp images with both lenses.

Of course, there is CONSIDERABLE difference in the image quality (at least in terms of fine details at high ISO) between the K-7 and the K-01.

In any case, Pentax engineers are always working to get better image quality out of every new camera ... but there is the possibility that you'll need to fine-tune the AF system with cameras that use PDAF.
05-06-2013, 06:49 AM   #12
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I own K5, K-01, and K30 and the image from the K-01 alway comes out looking crisper.
05-06-2013, 07:05 AM   #13
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QuoteOriginally posted by pdo Quote
I own K5, K-01, and K30 and the image from the K-01 alway comes out looking crisper.
Hmmm... Three cameras, all the same sensor. But the one without the hammering mirror is sharper. Mirror-slap maybe? (Clavius ducks in the corner.)
05-06-2013, 07:25 AM   #14
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Maybe a weaker AA filter in the K-01 has something to do with it. I am going to sell my K5 and maybe buy a K5 IIS after comparing images from K-01 and K5.
05-11-2013, 08:17 PM   #15
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I can't get my K-01 to give me as sharp of pictures as my K5 does.
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