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Oly 25 feels soft. Need suggestion

Discussion in 'Open Discussion' started by omzworld, Jan 11, 2015.

  1. omzworld

    omzworld New to Mu-43

    Jan 10, 2015
    Hi All,

    I am newbie to the forum and recently acquired EM10 along with Oly 25. I have been feeling the lens is having some issues and need feedback from more experienced members regarding the same. Following are some full size pictures along with exif data.

    <a href="https://www.flickr.com/photos/129844757@N02/16233819586" title="P1100028 by Omkar Guru, on Flickr">
    Subscribe to see EXIF info for this image (if available)
    "500" height="375" alt="P1100028"></a>

    <a href="https://www.flickr.com/photos/129844757@N02/16259653785" title="P1110095 by Omkar Guru, on Flickr">
    Subscribe to see EXIF info for this image (if available)
    "500" height="375" alt="P1110095"></a>

    <a href="https://www.flickr.com/photos/129844757@N02/16258828562" title="P1110089 by Omkar Guru, on Flickr">
    Subscribe to see EXIF info for this image (if available)
    "500" height="375" alt="P1110089"></a>

    <a href="https://www.flickr.com/photos/129844757@N02/16072291850" title="P1110101 by Omkar Guru, on Flickr">
    Subscribe to see EXIF info for this image (if available)
    "500" height="375" alt="P1110101"></a>

    I deliberately took few pics at F8 so that everything should be sharp.

    I took a few pics with Oly 40-150 which looked much better. One sample:

    <a href="https://www.flickr.com/photos/129844757@N02/16073517079" title="P1110105 by Omkar Guru, on Flickr">
    Subscribe to see EXIF info for this image (if available)
    "500" height="375" alt="P1110105"></a>

    Is it that I am not using the lens properly or the lens is having some issue. Full size phots and exif available in Flickr (by clicking on the photos).
  2. budeny

    budeny Mu-43 All-Pro

    Mar 4, 2014
    Boulder, CO
    Try to:
    - use aperture values of 4.0-5.6
    - set Noise Filter to off
    - set shutter shock option to 1/8 or 1/4 second
    - disable IBIS when it's not needed.
  3. eteless

    eteless Mu-43 All-Pro

    Jun 20, 2014
    It's hard to tell, on some of them it looks soft/weird however they also appear to be out of camera jpegs with the "sharpness" set to the highest value which can cause edge artifacts(many of the images appear to have halo because of it) also I think really heavy noise reduction crushing any fine detail(no fine detail... no critical sharpness).

    All of them have some area in focus:
    The first picture the focus appears fine, however it has chromatic aberration due to the high contrast and fstop.
    The second the focus seems fine to me however I think there may be moire issues on the fabric on the blueish parts as the bench/her legs appear sharp, I'm unsure... so it's hard to tell. (sharpness set to maximum has caused a few halos on branches in background, some CA in the corners).
    The third I'm unsure, that jacket seems to have weird behavior (to my eye it anyway, may just be me...)
    The fourth is sharp, you're focused on the tree behind him. (Edge artifacts due to sharpening on the trees are present as well however.)
    The fifth is a different lens however it shows the same behavior with that jacket...

    The jacket behaviour may just be the noise reduction, I can't tell what the noise reduction is set to as I can't find any mention in the exif, I also might be COMPLETELY wrong - I have no idea.
  4. Your first image does seem a bit soft but I don't know how sharp this lens should be at f/1.8. In the fourth image the camera appears to have focused somewhere behind the subject. Your second and third images look to be sharper than the one that you took with the 40-150mm but the subject doesn't stand out as well against the background. The blurred out background in the image from the 40-150mm gives the illusion of the subject being sharper in this image compared to the others.
  5. agentlossing

    agentlossing Mu-43 Hall of Famer Subscribing Member

    Jun 26, 2013
    Andrew Lossing
    I think the comparative sharpness of the 40-150mm is due more than anything to better subject isolation, but I could be wrong.

  6. Replytoken

    Replytoken Mu-43 Hall of Famer

    May 7, 2012
    Puget Sound
    If you cannot solve this, you could send the lens to Olympus if it is still under warranty. But, I would first try to make a few test shots under more controlled conditions. And, you should really evaluate raw files when doing so.

    Good luck,

  7. pellicle

    pellicle Mu-43 Hall of Famer Subscribing Member

    Feb 10, 2010
    Killarney, OzTrailEYa
    look OK to me ... perhaps some may have focused on background rather than subject ... and as others have said it may be JPG artifacts.

    The lens is rated to 10Perceptual Megapixels (9 on your camera) with peak sharpness in the center (have a look at the DxO rating). So that would mean your camera will produce more pixels but they will not hold more than 9 or 10 Mpix of actual details.


    If the Perceptual Megapixel rating is confusing for you, perhaps my alternative explanation here will help


    perhaps the issue is you're expecting it to be somehow superhot and in fact it will never be able to produce a pefect 16Megapixels (meaning don't pixel peep it)
  8. sdb123

    sdb123 Mu-43 Veteran

    Jul 25, 2014
    Northants, UK
    My experience of the Olympus 25mm is that it is anything but soft at f/1.8. Why not try shooting a subject close up at f/1.8, creating the maximum isolation possible and see what that looks like.
  9. Was this the one that caused the most grief?
    It's because the 2x digital teleconverter is on - EXIF shows "Digital Zoom Ratio - 2". That has halved the resolution. It also shows "Scene Mode - e-Portrait" which will also selectively blur the image to try and smooth skin.

    The others look more normal, but f/8 will have made them worse. Think of f/4 in m4/3 as f/8 in traditional DSLR land for depth of field. By f/8 diffraction will start blurring the image.

    Other general potential problems that I see:
    • Image 4 is clearly misfocused on the background rather than the person.
    • High JPEG compression - "Compression Factor - 8" sounds like Large Normal. Try Large Super Fine.
    • Too much noise reduction and sharpening for me with "Noise Reduction - Standard" and "Sharpening - Hard".
    • Like Like x 9
  10. pellicle

    pellicle Mu-43 Hall of Famer Subscribing Member

    Feb 10, 2010
    Killarney, OzTrailEYa
    Well spotted wjiang!
  11. Ulfric M Douglas

    Ulfric M Douglas Mu-43 Hall of Famer

    Mar 6, 2010
    Comparing your two similar frames ;
    at "original" size on Flickr they look very similar in sharpness on the person, in other words they both look fine to me.

    Do you have more specific questions or problems?
  12. omzworld

    omzworld New to Mu-43

    Jan 10, 2015
    Lot of helpful advice specially from you. I am going to experiment more today and post some more pics under controlled environment. Thanks a lot everyone!
  13. DigitalD

    DigitalD Mu-43 Top Veteran

    Jan 10, 2014
    Yea using the digital zoom in the camera is not great. Ive done some test shots with the digital zoom and just cropping a regular shot. Cropping is a much better option as you have more control over the details and quality of the shot.

    CPTKILLER Mu-43 Regular

    Dec 8, 2014
    Austin, Texas USA
    Jim Phipps
    I'd be happy with them. Not every shot is a keeper in any case.
  15. Ulfric M Douglas

    Ulfric M Douglas Mu-43 Hall of Famer

    Mar 6, 2010
    OP has disappeared?
  16. Sammyboy

    Sammyboy m43 Pro

    Oct 26, 2010
    Steeler Country
    .... maybe you should re-test ..... the digital zoom maintains pixel pitch ..... cropping does not ......
  17. DigitalD

    DigitalD Mu-43 Top Veteran

    Jan 10, 2014
    Ive seen evidence online that its better to crop rather then to use the electronic zoom. Google it, you will find the examples. Its pretty clear which produces better results imo.
  18. Geemone

    Geemone Mu-43 Regular

    Aug 9, 2014
    My piece of advice: sell it and get the Panasonic 25 1.4 and your problems will be gone... :2thumbs:
  19. MadMarco

    MadMarco Mu-43 Veteran

    Oct 30, 2014
    Guildford, England
    My advice is to reset the camera to factory defaults, set it to program mode and don't make any changes to the settings until you are sure what you are doing with it. Play with the settings one or two at a time until you figure what works best.

    I don't mean to sound like a dick, but making a ton of changes to the settings without really understanding them is a recipe for disaster. If the OP returns a post then I can post my current go-to settings if it will be helpful.
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