micro4/3 40-150 or MMF2 with 4/3 40-150?

Discussion in 'Adapted Lenses' started by QualityBuiltIn, Jan 1, 2011.

  1. QualityBuiltIn

    QualityBuiltIn Mu-43 Veteran

    Jan 1, 2011
    Edinburgh, Scotland
    I'd like to buy a 40-150mm lens to supplement the kit lens on my E-P1.

    Olympus make a 40-150mm on a micro four thirds mount at almost £300 and they make a 40-150mm for the other E-series cameras readily available for around the £100 mark but that needs an adapter, MMF 2 also about £100.

    What is the practical difference? Obviously I save about £100 buying the 2-part solution and it also opens up options for other four thirds lenses but are there limitations, quality consequences or crop factor issues?


  2. Mikmos

    Mikmos New to Mu-43

    Dec 8, 2010
    Would like to know that too. Im also looking at the Panasonic 45-200.
  3. Luckypenguin

    Luckypenguin .

    Oct 9, 2010
    Brisbane, Australia
    Real Name:
    There are no 'crop factor' issues. Both 4/3 and m4/3 lenses are designed for the same size sensor. The 4/3 40-150mm is a nice lens with no particular vices. Your decision will come down to smaller size and weight (m4/3) vs price and how useful a MMF-2 adapter is to you.
  4. QualityBuiltIn

    QualityBuiltIn Mu-43 Veteran

    Jan 1, 2011
    Edinburgh, Scotland
    Thanks very much for the advice. Looks like the 2-part option is the one for me: Less cost and more future with other 4/3 lenses.


  5. pdh

    pdh Mu-43 Top Veteran

    May 6, 2010
    but note also that with many 4/3 adapted lenses you will experience much much slower AF speeds ... unless the 40-150 is an exception
  6. Luckypenguin

    Luckypenguin .

    Oct 9, 2010
    Brisbane, Australia
    Real Name:
    Oh yeah, should have mentioned that. AF speed is...okay. As in compact camera okay. Certainly better than on earlier 4/3 lenses. Olympus obviously has faith in it though, as the 4/3 40-150mm + MMF-2 was the kit telephoto lens for the E-PL1 for a while.
  7. GaryAyala

    GaryAyala Mu-43 Legend

    Jan 2, 2011
    Welcome to Photozone!

    Is a site which performs laboratory tests on lenses and Klaus has tested a few 4/3rds lenses. I always see what Klaus has to say before I purchase a lens.

  8. Andrew Riddell

    Andrew Riddell Mu-43 Regular

    Aug 21, 2010
    When I bought my EP-2, it came with a free MMF-1 adaptor and I bought a used FT 40-150 for £50. For me, a 'no brainer'! Mind you, I don't go for action shots, so I'm not particularly concerned about AF speed.

  9. robertro

    robertro Mu-43 Veteran

    Apr 22, 2010
    Photozone does have a review of the 4/3 40-150, but does not address AF speed on 4/3 or on M4/3. It also doesn't review the m4/3 40-150 yet.

    I have the 4/3 40-150 and MMF2 and use them on an E-PL1. I'd say that the image quality is quite good; probably better than the 14-42 m4/3 lens. The AF performance is fine in decent conditions, and very slow in low-light conditions - nothing unusual there.

    Out of curiosity, I compared AF speed at 40mm between the m4/3 14-42 and the 4/3 40-150 under difficult conditions. I set the camera to center focus, aperture priority at f5.6 and tried it on a variety of subjects in a moderately-lit room this evening.

    The higher-contrast subjects (table leg; eyes) seemed to focus almost equally quickly; the lower-contrast subjects (woodgrain; my wife's hair) failed to focus most of the time with the 14-42, and focused most of the time with the 40-150. The speed was not significantly different; if anything the 40-150 was slightly slower, but I couldn't be sure. The 14-42 seemed to go through a larger focus range to achieve focus. When I tested the 40-150 on the same subjects at 150mm, it behaved similarly to the 14-42 at 40mm, failing to achieve focus on lower-contrast subjects. This suggests that f5.6 behaves the same on both lenses, and the benefit of the 40-150 is the f4 aperture at 40mm.

    For me, the 4/3 40-150 with adapter seems to be one of the great bargains of the m4/3 world and having read some of the commentary from 40-150 m4/3 users, I'm not convinced that it is any faster or more reliable to focus (it is smaller though). The extra bonus for me is that I can use the m4/3-4/3 adapter with less bulky legacy lens to 4/3 adapters to use manual focus glass.