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Review Telephoto Zoom comparison

Discussion in 'Reviews, Tests, & Shootouts' started by ralf-11, Apr 14, 2019.

  1. ralf-11

    ralf-11 Mu-43 All-Pro

    Jan 16, 2017
    I am posting 2 images, both are out of the camera .jpg files, both taken with a tele zoom lens. Both were taken with the camera on a flat rest (no tripod) and while I couldn't get the exact same zoom, both at approximately 700 mm.

    D:
    D.JPG
    Subscribe to see EXIF info for this image (if available)


    M:
    M.JPG
    Subscribe to see EXIF info for this image (if available)


    I'd like people to tell me which one has higher image quality (except for color tones).

    I'll reveal which is what after we get some feedback (i.e it is a blind test). 1st pic is D; 2nd is M

    Thx
     
  2. Jeffcs

    Jeffcs Mu-43 Top Veteran

    692
    Jan 20, 2017
    Toms River NJ
    Jeffrey Swank
    No idea what lens was used for what image but the bottom image “M” is a bit soft
     
    • Agree Agree x 5
  3. I'd consider it to be very soft, particularly at the rt edge
     
  4. Jeffcs

    Jeffcs Mu-43 Top Veteran

    692
    Jan 20, 2017
    Toms River NJ
    Jeffrey Swank
    I was being kind and I was looking at the Center branch with the flowers you sir are correct right side is soft
     
    • Like Like x 1
  5. Brownie

    Brownie Mu-43 Veteran

    419
    Sep 3, 2018
    SE Michigan
    Top is better.
     
    • Agree Agree x 1
  6. Thai-Mike

    Thai-Mike Mu-43 Hall of Famer

    Aug 2, 2016
    Thailand
    Michael
    First is sharper
     
    • Agree Agree x 2
  7. Lupin 3rd

    Lupin 3rd Mu-43 Veteran Subscribing Member

    313
    Aug 13, 2018
    MoCo, MD
    Top image is sharper. Also has a nicer separation between in-focus and out of focus areas, EG: central cluster of flowers and the one at 7 o'clock. Whereas the lower image just blurrs everything.
     
    • Agree Agree x 1
  8. snaimpally

    snaimpally Mu-43 Top Veteran Subscribing Member

    972
    Dec 31, 2012
    Top image has better bokeh - I prefer the top image
     
  9. Is this a review or a shootout?
     
    • Agree Agree x 2
  10. panamike

    panamike Mu-43 Hall of Famer Subscribing Member

    Jul 5, 2016
    Lincolnshire UK
    Not too keen on these blind tests as they are often an attempt to prove a cheap lens is better than a more expensive lens.

    The first image has the edge on sharpness over the second,the second fails to achieve sharpness completely,looking at the oof background the first is best but this could be due to the focus point actualy being further back on the second image.
     
  11. D. I agree M is soft, but I think it may be a tiny focus issue, or different aperture. It also appears to be a different focal length. Close, but clearly D, I agree.
     
    • Agree Agree x 3
  12. oldracer

    oldracer Mu-43 Hall of Famer Subscribing Member

    Oct 1, 2010
    USA
    No way to tell because focus errors are possible/unknown. This is why resolution test targets are not three dimensional.
     
  13. Ah! But there's more to a lens than resolution. How many times have I put the young lions in their place by reminding them "my lens is bokier than yours, eh?" or "micro-contrast", that new particle that was spotted taking a photo of the Higgs-Boson as it sped by on its way to uncertainty. Or "Frog Coating", where the designers smear frog slime on the front element to get that last bit of bokey resolution. Yup, lots to consider I reckon.
     
    • Funny Funny x 1
  14. oldracer

    oldracer Mu-43 Hall of Famer Subscribing Member

    Oct 1, 2010
    USA
    @ralf-11@ralf-11, there is quite a good test target available here: 1951 USAF resolution test chart - Wikipedia Something like this would be much more useful if you want to be comparing lenses, testing for shutter shock, etc.

    113px-USAF-1951.svg.png
    Subscribe to see EXIF info for this image (if available)

    A "Flat rest" is probably not enough for camera stability though. I suggest a really solid tripod like a Gitzo 3-series and some kind of remote release. I have a cabled release that I bought for a few bucks on eBay, but usually I just use the Panny Android app. It is glacially slow for actual photography but that doesn't matter for testing.
     
    • Like Like x 1
  15. StephenB

    StephenB Mu-43 Top Veteran Subscribing Member

    932
    Aug 29, 2018
    Somerset UK
    Steve
    The second is very soft, all over. I'm looking at it on a Dell IPS, image sized to 18" on the long side.
     
  16. TNcasual

    TNcasual Mu-43 Legend Subscribing Member

    Dec 2, 2014
    Knoxville, TN
    The second image just looks like missed focus to me.
     
  17. Pluttis

    Pluttis Mu-43 Veteran

    371
    Nov 14, 2016
    Sweden
    Peter
    First looks sharper and nice out of focus rendering.

    Guess we are comparing two different lenses on two diffrent cameras/sensor sizes as the framing and picture size is diffrent.
     
    • Agree Agree x 1
  18. ralf-11

    ralf-11 Mu-43 All-Pro

    Jan 16, 2017
    It is - I just checked the focus point with an add-in for LR. I will reshoot and post again. (I wish LR had a way to check the focus point w/out all the rigamarole).

    BTW, I used a rest as that also tests the IS in the different lenses, etc. and is the way I will mostly use this lens.
     
  19. ralf-11

    ralf-11 Mu-43 All-Pro

    Jan 16, 2017
    ok, here is M2, the second attempt with that lens. I checked the focus point and it is good.

    Let me know if there is something I can do to make comparison with the D image easier, and thanks much for your help!
    M2.JPG
    Subscribe to see EXIF info for this image (if available)
     
  20. panamike

    panamike Mu-43 Hall of Famer Subscribing Member

    Jul 5, 2016
    Lincolnshire UK
    To me D looks best but could with them in the same post
     
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