A Series E question...

Discussion in 'Open Discussion' started by AlwaysOnAuto, Aug 12, 2017.

  1. AlwaysOnAuto

    AlwaysOnAuto TalkEmount All-Pro

    Feb 17, 2015
    Other than the minimum aperture, would a Series E 50mm 1.8 with a Nikon 2x extender be the equivalent of a Series E 100 2.8?
    What kind of tests would you suggest to determine the 'winner'?


    (Hey, it's Saturday morning and I've got nothing better to do than think up dumb stuff like this, what can I say? And yes I know it's a Nikon question but I'd be using my A7ii or Nex-7 to run the experiment on.)
     
    Last edited: Aug 12, 2017
  2. fractal

    fractal TalkEmount Hall of Famer Subscribing Member

    Jun 17, 2014
    Southeastern PA
    Chris
    anytime you put an extender/converter on you will lose some image quality; but I think the stop of light loss is correct.
     
    • Agree Agree x 1
  3. WNG

    WNG TalkEmount Hall of Famer

    Aug 12, 2014
    Arrid Zone-A, USA
    Will
    Use the A7ii to do your test for a more revealing result. You'll see if the extender will affect the edge sharpness.
    You will lose 2 stops with a 2x extender. More like a 100 f/3.5, the extender may reduce the T-stop more so than the 100 f/2.8.
     
    • Like Like x 1