David,
It's a great article teaching me to understand the complex distortion. I
have never thought that the distortion is so serious for MFT lens. I think
most of lens producers, such as Nikon, Canon also go to the way of
distortion correction by software.
Cheers,
Michael
On Tuesday, June 23, 2015, David Young <dsy@xxxxxxxxxxxxxxx> wrote:
> Good Morning, Wayne.
>
> Much of which lens you use will depend on how you "see". I see long...
> probably a result of only owning two lenses for the first 20 years of my
> photogahic life - an 85/1.8 Nikkor and the 200/4 Nikkor - both on a Nikon
> "F".
>
> No matter what the reason, I found the 12~60 Zuiko an excellent lens on my
> E3. I sold it, replacing it with the new 12~40/2.8 PRO. That was a
> decision I regret.
>
> I find the moustache distortion in the 12~40 very distressing. Yes, it
> can be corrected in various RAW developers (on in the camera, if shooting
> JPEGs) but as has been noted earlier in this list, it results in cropping,
> thus reducing the actual field of view.
>
> Personally, I develop in RawTherapee, which does not do the correction.
> However, I worked with Tom Nieman, of PTLens, to develop the correction
> profiles for the 12~40, which seem to work better than some of the other
> software corrections.
>
> The 12~60 is, of course, larger and heavier than the 12~40, so the balance
> is a wee bit off, but I did not find it bothersome. Your mileage may vary.
>
> Some people have disparaged the new MMF-3 FT>mFT adapter, for it's plastic
> body. I however, find it lighter yet certainly strong enough to hold both
> the 50~200/2.8-3.5 SWD and my 400/6.8 Telyt. When using heavy lenses, I
> see no need to add the addition weight of a metal adapter, if you don't
> need to.
>
> I'm sure the new 40~150 mFT lens is great. But it has insufficient reach
> for me, even with the new 1.4. For rodeos and other distant subjects, the
> 50~200 SWD is still my "go-to" lens, with the E-M1. (All the rodeo images
> I've posted here, were made with that lens.)
>
> I admit I like the 12~40/2.8 for it's size and weight (good as a travel
> lens), but I sure miss the reach of the 12~60. And, being "old school", no
> matter how easily I can fix the moustache distortion, it rankles me that it
> even exists. To my feeble mind, very poor design.
>
> Focusing speed, with the new 3.0 firmware, is very good, and very
> accurate. I'm hoping that one more update for PD focusing will come along,
> as has been implied by recent interviews with Oly. staff. If there is a
> problem with the PD focusing it is that the on-sensor phase detectors are
> not "cross-type", so it has a harder time on subjects with predominantly
> horizontal lines. Still, I find it works very well.
>
> If you have, or can borrow, the 12~60, give it a try. I think you'll like
> it!
>
> Sorry, but I cannot comment on the 14~54, as I've never even seen one!
>
> You might want to check out my review on the moustache distortion ...
> found here:
>
> http://www.furnfeather.net/Reviews/Moustache.html
>
> I'll be curious to to hear you you make out with the older lenses.
>
> Good luck!
>
> David.
>
>
>
>
>
> > Does anyone have any recommendations for the 4/3 12-60mm f2.8 or 14-54mm
> > f2.8 on the OM-D EM-1 ?
> > I'd like to have the m4/3 12-40mm however I do have the other 2 4/3
> lenses
> > and would like to make use of them on m4/3 if they are half reasonable on
> > the E-M1.
> > How is the focussing speed/accuracy ?
> > What about image quality, resolution, contrast, etc. ?
> > Balance on the body ?
> >
> > I'm more interested in practical experience rather than theoretical
> > speculations.
> >
> > ...Wayne
>
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--
Cheers,
Michael
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