My Photasy brand adapter, arrived very fast from rainbow imaging. ~$15
I chose it because it had a ribbed interior to cut reflections, as well as a
tab rather than a screw aperture detent.
The fit is snug for both the E mount and the OM mount,will have to see how it
wears.
Only downside so far, is the red line on the lenses does not line up exactly at
the top of the camera, it is off vertical axis a bit.
Seems to focus to infinity ok.
Now in use, I really like the A7 with OM lenses,it is almost like using an OM4
again. They have really done a lot, to greatly improve the experience of using
legacy glass on this camera. Interesting, how some of the changes, over and
above full frame compact body, have so greatly improved the experience over my
Canyon adapted body.
I did a trip to Peru earlier in the year and used my old canyon APS-C camera,
with some Canyon mount lenses and some adapted OM lenses.
At the time, I thought just how much I missed the fun of a great travel camera
like an OM2. Having to put up with a dim finder,lousy focus screens etc.stop
down focus issues etc, takes away half the fun. Most of the issues are dealt
with in some fashion in the A7. Not that the A7 does not have a few issues too
and it chows batteries.
Lens contrast with the A7 seems really quite good, compared to the same glass
on the Canyon. Not sure whether the sensor is less reflective, or whether it is
a dirty sensor on my old camera? At a quick look, lateral Color fringing looks
acceptable, even on wides.
Still learning to use all the cameras myriad options.
It accepts regular hot shoes ,and I took a few shots with a T32. Not sure what
specified sync speed is, but it seemed to work to ~1/300 th. The high sensor
sensitivity is a huge improvement over my very old Canyon.
So far I have tried the following mostly OM lenses with very pleasing results:
135/2.8, 21mm/3.5, 16mm/3.5 fish eye, 14mm/3.5 sigma (in OM mount,is low
contrast lens even on OM),135mm F1.8 Sigmatel (monster cult lens in OM
mount,difficult to focus even on Om, but works well on A7 with focus aid) and
favorite Novoflex follow focus 240mm (also with OM 1.4X adapter),
Still to try : My stereo microscope (not Oly!) with its OM adapter,50mm/1.8,
28mm (seldom used), 35mm/3.5 shift (seldom used), Novoflex 400mm, 50mm/3.5
macro and my favourite and most used Zuiko of all time 24mm/F2. Novoflex
bellows with various flat field lenses (Canon 20mm micro in RMS-OM,Minolta
,Zeiss)
Lots to play with still and maybe then do some actual photography!
Tim Hughes
________________________________
From: Hughes <timhughes@xxxxxxxx>
To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
Sent: Thursday, September 18, 2014 2:18 AM
Subject: Re: [OM] Best OM to A7 adapter?
<no chipped adapters for mirrorless cameras.>
There are a few very smart adapters for FE mount though:
Sony themselves makes a very smart adapter for the original A mount ( Minolta
AF mount lenses, and later Sony/minolta fully electronic elaboration). This
includes the older mechanical diaphragm stop down mechanism and the auto focus
mechanical screw drive of the original early A mount, as well as all electronic
newer versions.
This unit incorporates a partial silvered mirror with phase detector (losing
1/3 stop of light) but this allows the same fast focus speed with the old
lenses, of a modern camera and allows focusing even while videoing or during
shutter release blackout. This is probably very good for Sony's high resolution
video camera that uses EF mount lenses.
For many of the old lenses, this device includes Exif info and other
features,depending on lens vintage.
There are actually two current Sony smart adapters with less and more backward
compatibility. The most full featured one is pricey ~$350, the other one does
not include phase detect focus but also does not lose 1/3stop.
Metabones makes a somewhat similar Canon EF to Sony FE mount adapter, for using
Canon AF lenses on these bodies, although auto focus speed is not as fast.
That also includes full diaphragm automation and exif data. Cost is ~ similar
or a little more.
There is at least one other vendor making a Canon adapter similar to metabones,
but seems of lessor quality/ cheaper. But likely will improve over time.
So an A7 can be used with most Minolta/Sony (alpha mount) A mount lenses going
back to 1985. Third party lenses in those mounts have worse compatibility and
may not all work. In addition most electronic Canon EF lenses (late 80's to
today) will work with AF, diaphragm control,program mode etc. at a cost.
The Minolta Maxxum lenses from the mid 80's to early 2000's included a few very
good lenses and prices are often very reasonable used,unlike new Sony and Sony
Zeiss lenses which tend to be expensive.
There are a few compact Aps C Sony lenses in E mount, like the 16-50mm pancake
zoom,with anti-shake, which turns a full frame A7 into a pretty compact travel
camera, when you want to leave your larger lenses at the hotel. The body can
autodetect APS format lenses and crop accordingly, if you choose that setting.
So that lens is 24mm-75mm equivalent and produces 12M pixel pictures, a nice
bonus option for walkabout.
The focus aid magnification in an A7 ,can help make the fact that no simple
chipped adapters are available, a bit less important.
Tim Hughes
________________________________
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, September 17, 2014 9:27 AM
Subject: Re: [OM] Best OM to A7 adapter?
AFAIK, there are no chipped adapters for mirrorless cameras.
Chuck Norcutt
On 9/17/2014 11:41 AM, Ken Norton wrote:
> Another factor, is having to turn the camera off when changing lenses.
> If you use just the one adaptor, you can swap lenses without the
> camera needing to be turned off. This, however, is worthless if you
> use chipped adaptors that identify the focal length used.
>
>
So, whatever...
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