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25mm 1.7 and 42.5mm 1.7

Discussion in 'Native Lenses' started by Psynema, Jan 9, 2016.

  1. Psynema

    Psynema Mu-43 Regular

    81
    May 14, 2011
    Philadelphia
    Gary Hanna
    Anyone get the new guys yet?





    The 25mm is still on back order for a lot of people - wow, waiting until March from BnH I hear.
     
  2. BigTam

    BigTam Mu-43 Top Veteran

    773
    Mar 19, 2012
    Dortmund, Germany
    Ron
    • Informative Informative x 1
  3. Taurahe

    Taurahe Mu-43 Regular

    53
    Nov 24, 2015
    Brandon
    I got my 25 1.7 in november before they disappeared. Overall I am very happy with. Af is fast, it is very sharp and contrast in good light, and it is affordable. It is not as good as the pan Leica lenses but it is no slouch. It is on my camera more often than not. I have made some really great portraits with it since I gotb
     
  4. tpitch14

    tpitch14 Mu-43 Regular

    156
    Mar 31, 2010
    PA
    I have the 25, and the 42.5 is arriving today... been pleased with the 25 after moving from the O25, and looking forward to the closer focus distance and stabilization of the 42.5 on my G7 as well over my O45. Nice reviews, and cheers from up the road in KoP!
     
  5. Turbofrog

    Turbofrog Mu-43 Hall of Famer

    Mar 21, 2014
    Any reason in particular you swapped over from the O25? Is it for better continuous autofocus with the G7, or just to recoup a few hundred $$$?
     
  6. Jonathan F/2

    Jonathan F/2 Mu-43 Hall of Famer

    Aug 10, 2011
    Los Angeles, CA
    I have the Pan 25mm 1.7 lens. It's nothing special, but for the price of $99, there's no reason not to have it in your kit!
     
    • Agree Agree x 2
  7. tpitch14

    tpitch14 Mu-43 Regular

    156
    Mar 31, 2010
    PA
    Being able to get it at a lower cost helps, but I guess I just wanted to convert over to an all P lens stable with a new P body. Autofocus improvement and perceived positive from the DFD technology are others. I can live with the slight increase in size- I am on a pretty substantial (by m43 standards) size body afterall
     
  8. Psynema

    Psynema Mu-43 Regular

    81
    May 14, 2011
    Philadelphia
    Gary Hanna
    Ah nice King of Prussia. You have a site? May have met you maybe at an event.

    I agree - it's actually very close to the 25mm 1.4, but I'm mainly using the 25mm as an interview, casual VLOG lens and the C-AF is holding up very well. Never used the 25mm 1.4 that much, but the full four thirds 25mm was the best, but HUGE.
     
  9. tpitch14

    tpitch14 Mu-43 Regular

    156
    Mar 31, 2010
    PA
    Nope, just a hobbyist here [emoji4]
     
  10. pellicle

    pellicle Mu-43 All-Pro

    Feb 10, 2010
    Southport, OzTrailEYa
    pellicle
    yeah, though I only got one of them. The 25mm Panasonic is nice. I'm not really using it much at the moment but at 99bucks wasn't even going to think about not getting it.

    It does exactly what I expected it to do and has better image quality wide open than the Canon 50mm f1.8 ever does on a full frame camera
     
    • Like Like x 1
  11. Pentaxis

    Pentaxis Mu-43 Regular

    26
    Mar 10, 2014
    Seems the Panasonic 25mm 1.7 has tripled in price now?
     
  12. pellicle

    pellicle Mu-43 All-Pro

    Feb 10, 2010
    Southport, OzTrailEYa
    pellicle
    you mean gone back to its normal price after the incredibly unbelievably low sale price of late last year (that curiously provoked anger)?
     
  13. stenlius

    stenlius Mu-43 Regular

    32
    May 9, 2013
    Bulgaria
    Anyone using the P25 with an E-M5 body - do you have slight underexposure when shooting wide open outside with bright light? I get around -1 EV underexposure in some cases shooting at 1.7, which is gone if I shoot the lens at 2.8 and wondering is it just my E-M5 or smth else. I shoot RAW, matrix metering, I know that E-M5 underexposes a bit, but never had such experience with O45@1.8.
     
  14. pellicle

    pellicle Mu-43 All-Pro

    Feb 10, 2010
    Southport, OzTrailEYa
    pellicle
    Hi

    if there are really bright things in the view (that are still over exposed) it could be just the camera trying to compensate for that. The wider the lens the more there is stuff in the viewfinder which is bright (when outside in bright light) and that could be the factor.

    HTH
     
    • Like Like x 1
  15. stenlius

    stenlius Mu-43 Regular

    32
    May 9, 2013
    Bulgaria
    Just trying to learn the conditions in which it underexposes, there was some snow or white clothing in some occasions, but there are other pictures, where there was nothing overbright in the frame. But I suppose you are right, the lens wide open means the camera it already at it's maximum speed of 1/4000 and ISO100 and trying to not overexpose and it goes under. Just two samples below, the second one had +0,7EV and it is still underexposed:

    2016-02-01 23-04-12 Screenshot. 2016-02-01 23-08-44 Screenshot.

    Otherwise, the Panasonic 25/1.7 is a very nice lens - sharp wide open, fast autofocus, decent contrast with the hood attached and reasonable price.
     
  16. pellicle

    pellicle Mu-43 All-Pro

    Feb 10, 2010
    Southport, OzTrailEYa
    pellicle
    hard to know without seeing ... I'm not sure what was the example being shown in the above photographs ... I didn't see any exposure compensation information in the data on the pictures, they both have 0EV. The last one in full sunlight with the cross and feathers looks under exposed but again not enough information (I don't know what 7/10 EV means). To me what I see there is the camera has chosen to pull the picture darker so as not to blow the white on the feathers. If the exposure was higher (for adequate background) then the feathers would be blown highlights.

    this point seems confused ... if the shutter is already at 4000th and you've selected f1.7 then the shot will be over exposed because the camera can not adjust exposure down further (of course P would usually solve this).
     
  17. stenlius

    stenlius Mu-43 Regular

    32
    May 9, 2013
    Bulgaria
    0EV and 7/10EV is the exp compensation applied during capturing the image, so the two images above are without any compensation /but notice the difference between F1.7 and F2.8 in exposure/, and the one with the feathers was shot with +0,7EV. What frustrates me is that wide open it underexposes, but when you close it a bit - the exposure goes as it should be.
     
  18. pellicle

    pellicle Mu-43 All-Pro

    Feb 10, 2010
    Southport, OzTrailEYa
    pellicle
    Hi
    yes. I see that on the left image the whites are preserved but on the 2.8 image they are blown

    I wasn't sure if both were "full image" (scaled) or 100% pixel crops.

    back in the day of 4/3rds there was a known issue with lenses of greater than 2.8 in aperture. It was as if the cameras were unable to cope.

    let me look at my Pana 1.7 on my GH-1 tomorrow. I'll be busy so it may not be till the day after.

    Mean time try a more rigorous test on A with the camera on a tripod (so composition doesn't change) and see if the problem persists.

    PS

    I found the reference

    of course this is different, but the above was a theory to explain the observed. I never felt right about the image circle / larger coverage theory.

    wrotniak.net: OM 1.8/50 Zuiko used on Olympus E-300 Digital Camera
     
    Last edited: Feb 2, 2016
  19. GFFPhoto

    GFFPhoto Mu-43 All-Pro

    Feb 24, 2013
    Seems to me that would be a camera issue. The body calculates exposure and chooses the setting for the parameter you have on auto in order to expose the shot correctly. The lens is just a dumb slave to the body.
     
  20. dweller

    dweller Mu-43 Veteran

    378
    Sep 14, 2012
    London, UK
    This rings a bell. I think I get that with my EM5.
    It was dimming the sky much more than other cameras and I could really see the vignetting on the LCD screen.
    A bit disconcerting. I haven't been using the lens that much but will try again to see if the exposure changes as I close the aperture.