On 5/31/2015 7:15 PM, Chris Trask wrote:
To get real WA for 4/3, about the only choices are Oly's triumvirate of
WA zooms, 7-14, 9-18 and 11-22 or the discontinued Sigma 10-20.
Now that I have the 9-18 I'm certainly using it but not a great deal.
The 12-50 is what's usually on the camera or the 14-150 if I don't know
what I'm likely to be facing.
...
I've had a number of instances while hiking in canyons and riparian areas
where a 28mm FL is insufficient, and stitching a few vertical format photos
horizontally simply does not do the scene justice. I tried 24mm zooms, but
they did not improve the situation much.
My point was, and is, that these are not actually wide angle lenses on your 4/3 camera bodies. 28 mm is insufficient
simply because the angle of view is the same as a 56 mm lens on a 35 mm film or FF digital body. Of course it isn't wide
enough, it's 'longer' than a standard focal length lens.
Reading a number of blogs (nature and cityscape photography) led me to
understand that 17mm or 18mm was the widest you could use without experiencing
noticeable corner distortion (proper term here?). This Samyang lens has 6%
distortion at 18mm and 2% distortion at 28mm, according to the specs I read.
You are still confabulating FF lenses on FF vs. 4/3 format bodies. The 17-18 mm they are talking about is on FULL FRAME
cameras. When you put them on 4/3 format cameras, you only see images from the center of the image circle. All edge and
corner problems, all the problems they are talking about, aren't there, poof, vanished.
But OTOH, the width of the image is also gone; they aren't actually very wide, either. 17-18 mm on 4/3 'sees' the same
view as a 35 mm lens on FF. To get the equivalent angle of view on 4/3 as 18 mm on a FF camera requires a 9 mm lens.
The Oly 9-18 zoom @ 9 mm is, not coincidentally, about the same in angle photographed on a 4/3 body, as the 18 mm short
end of the Samyang is on a FF body.
The sample photos I came across on that Flickr page looked pretty nice.
But taken on what format camera? Are they actually WA?
Formatal Confusion Moose
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What if the Hokey Pokey *IS* what it's all about?
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