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04-10-2012, 06:28 AM   #1
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Blurry images with old manual focus lenses and k-01

Ola!

I'm new to the dslr/mirrorless world. I've used a Sigma DP1 a lot and I have an old Pentax ME with 4 excellent primes. The manual lenses drove me to purchase K-01 with the 40mm lens.

I'm very happy with the camera and the default 40mm XS lens. It creates great portrait and detail pictures, even though it's not so good for street photography, cause it's not that wide. Here's a shoot of a country fair I attended this weekend: eenk.com - Bulgarian country fair

The problem occurs when trying to focus with the manual lenses. I've tested all my lenses - Pentax M 24mm/2.8, Tokina 28/2.8, Pentax M 50/1.8, Pentax M 100/2.8, Prinzflex 135/2.8 and all of them can't seem to give much detail when focused to infinity. If I shoot with my 24mm the objects in the horizon look more blurry than a photo from an iPhone 2G. Even if I focus at close range, the area in focus doesn't have the detail I expect from that sensor and lens. Focus peaking doesn't help either.

Do you think I'm not doing something right in setting up the manual lens or my camera might be buggy? I assume all my 5 lenses cannot be faulty.

Anyone experienced the same problem?

Thank you!

P.s. I'm attaching some photos with the camera focused to infinity and some close ones.

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04-10-2012, 07:42 AM   #2
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My first thought was that these look like they were taken wide open on a lens that isn't great wide open. Looks like a lot of CA and lack of contrast. Have you tried stopping down to f/5.6 or f/8?
04-10-2012, 07:44 AM   #3
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Agreed with enoeske...looks wide open in all cases. If these are "M" lenses, make sure you're not set on "A" mode.
04-10-2012, 07:59 AM   #4
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Yes, I've tried 4 and 5,6. Still the same.

Will try closed apertures and re-post other images.

04-10-2012, 08:01 AM   #5
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I would stop down and possibly bump up the ISO. By stopping down to something like f8 (but I would not go over f11), you are going to increase your depth of field and take advantage of hyperfocusing, thus you will have more in focus even if your manual focusing is a bit off. Also, you can try the focus peaking capability of the K-01.

04-10-2012, 08:06 AM   #6
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Even with focus peaking, can you try shooting with the zoomed in magnification, on a tripod?

Zoom into something in the distance, make sure that the image is clear in the LCD screen, then take the picture at F8 in manual settings. Your exifs are all showing Av mode - which is weird because Av mode would be setting the aperture as wide open (F2.8).

Shoot in manual mode, turn the aperture ring to F8, focus on an object in the distance on a tripod, and shoot. Let me know what happens.
04-10-2012, 08:09 AM   #7
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Yes, Av mode does not stop down the lens. It will shoot wide open. You need to be in M mode.
04-10-2012, 08:19 AM   #8
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I did a lot of tests in M Mode, but the images are at home. Will post them here tomorrow. Thanks guys!

04-10-2012, 08:22 AM   #9
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Remember, use the magnification feature to check focus - don't just depend on the focus peaking. In your pictures, the focus appears to be set as "distant", which I believe means "far to infinity". Checking the image in high magnification will tell you if your settings are weird, or if anything is wrong with the camera.

For example, your third picture shows "distant" and the shops look relatively sharp, but the foreground is blurry. So that looks specifically to me like large aperture focused in the distance.
04-11-2012, 07:52 AM   #10
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I'm stupid

Ola!

It was entirely my fault not considering that the aperture doesn't change when I use AV mode.

Here are 3 similar pictures with 40mm (kit lens), 24mm/2.8 and 50mm/1:7 (Pentax M) lenses that show much detail on aperture 8, 1/320 speed and 100 iso on a cloudy day from my office window.

Thanks for the help. I really enjoy the Pentax community and support.
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04-11-2012, 07:53 AM   #11
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Happy that it worked out for you!
04-13-2012, 12:25 AM   #12
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For a moment you gave me a chill, as I intend to get my K-01 soon, and I shall be using my old manual lenses a lot!
04-13-2012, 12:42 AM   #13
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I did shot with the 135 f2.8 few weeks ago, will try to check if I'm getting any sharp pictures...
10-06-2012, 11:14 AM   #14
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thanks guys!

today i used for a first time my "new" revueonon 1.4 50mm. I did some shooting, wonderful images, but it somehow not so sharp as i thought could have. Well, when i switched to manual on my Kr and found finally for what i have AV button, everything seems just fine! tomorrow i will do some outdoor shooting, but i am sure i will be pleased

thanks again
10-08-2012, 09:51 PM   #15
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remember that m lens only works under m mode if there is no a aparture option.
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