Is the 17/1.8 snap-focus ring a gimmick?

Started Jan 31, 2013 | Discussions thread
Jun2 Senior Member • Posts: 2,237
Re: Is the 17/1.8 snap-focus ring a gimmick?

mh2000 wrote:

Jun2 wrote:

Yes, it's a Gimmick. My 12mm f2 markings are sometime accurate, sometime not. The thing is the whole thing is not mechanical, that is still electronic wire focus. I don't really know what the markings are based on. I don't have 17mm, I would expect to be similar.

You're not supposed to guess focus for f2!!!!!

You guess focus at f5.6 or smaller!

Personally, I'm considering getting the 17/1.8 specifically for the scale focusing! I shoot a lot of ultra low light interior shots and manually focusing the 17/2.8 can be a real pain, so just snapping to f7.1 and setting focus to 5 ft or 3m would be perfect!

-- hide signature --

You have no idea what I did.  I focus manually zoom in (not using the scale) at f/2 in the GH2 view finder.  Then, looked at distance scale indicated by focus line.  I did 3 time from the edge of a table to a painting on the wall. 3 times were performed on different days (after doing some AF in between).  Distance readings indicated by focus line are not consistent (too far apart).

Don't think you played it as I did.

 Jun2's gear list:Jun2's gear list
Sony a5000 Sony a6000 Olympus M.Zuiko Digital ED 12mm 1:2 Sony E 50mm F1.8 OSS Sony E 55-210mm F4.5-6.3 OSS +2 more
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