Discuss - Sigma 56mm f1.4 DC DN

NIlaga

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FYA. I still get the issue on the replacement lens. Issue is also present on the store's demo Em10iii but not on the Em1ii.
 
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speedy

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FYA. I still get the issue on the replacement lens. Issue is also present on the store's demo Em10iii but not on the Em1ii.
Olympus really does need to get its butt into gear, & update the lower tier bodies with a more modern AF system. Selling expensive, high end gear to the faithful, is not a sustainable long term business practice, unless your name is Leica. Or similar
 

NIlaga

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@mnhoj thanks.

@speedy There are others not experiencing any issues with EM10ii and the Sigma 56 but yes, I hope Oly will put hybrid (?) AF on lower tier bodies too.
 
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Reflector

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Just got mine today and got to play around with it a few minutes. Surprisingly it is a lot smaller than I had expected it to be even if it is a bit dense. It's like a 110-120% sized Olympus 30mm f/3.5 Macro (diameter wise, they're both the same lengths with the lenscaps (thicker on the Sigma) if you measure it from the bayonet) but with an appropriately sized front element. It is definitely a closer focusing lens than the 75mm f/1.8 but when you need reach you need reach... I think I'm going to like this a bit more than the 75mm for the tradeoff it makes for the shorter focal length and closer focus for general purposes.

Little notes:
It does have a sort of o-ring/gasket that barely protrudes from the mount surface, it is a little less high than my 12-100.
It doesn't feel as dense as the 75mm f/1.8.
You can REALLY feel the aperture blades closing down on it at 2.8 and up.
I think it focuses a bit faster than the 75mm f/1.8 but it isn't as fast as most of the primes and the 12-100.
The focusing ring isn't too tight or too lose, has some dampening but less than on some of my other lenses.
Bayonet tightness was "just right". It goes on smooth without feeling loose.
On the E-M1II if you shoot continuous high the aperture blades will "stay" in position rather than retract after each shot allowing for 60 fps stacking.
Filter thread is 55mm which is unusually sized (for what I'm used to).
The aperture closes down when you power the camera off.
 
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Reflector

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It really is just like a slightly larger 30mm f/3.5 Macro for the barrel.

Image quality: Haven't gone out and shot properly with it yet. It is indeed sharper than the 75mm f/1.8 wide open... Things change when you stop down.

Experiments: I think it could actually use a 55mm to 46mm step down ring (something I'll have to buy later) and a thinner lenscap like the LC46s which I personally prefer. That entire assembly would be smaller and share filters as well as shade a little of the element. I tried putting a 37mm step down ring on it and it didn't really seem to darken much of the image. I assume it is most likely that's the APS-C part of the image circle that already experiences most of vignetting and I'm not really losing anything out of it. Given to achieve a 56mm f/1.4 lens the front element just needs to be 40mm (which it is, roughly), a 46mm thread with a filter shouldn't hurt it too much. I'll have to do some experiments later with my existing step down ring set (which certainly don't work in the same way given they protude out into the field of view potentially)
 

Turbofrog

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Thanks for the illustration. Looks only ~10% bigger than my old Super-Takumar 50mm/f1.4. Might be a lens I'm interested in picking up once cheap examples start to filter onto the used market.
 

Reflector

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Thanks for the illustration. Looks only ~10% bigger than my old Super-Takumar 50mm/f1.4. Might be a lens I'm interested in picking up once cheap examples start to filter onto the used market.
Only bought the one I have now because it was going for $400 after taxes.

On another note:
That discussion about focus inaccuracy does have me a little concerned. In my very inconclusive casual testing of it I noticed it does tend to focus a little towards the back when it is presented with some detail (the entirety of the focus point has detail) when in S-AF+MF mode with the E-M1II but that area is technically at the corner of the small focus point. I will have to experiment with it more and see if the lens needs to have microadjustment values set in the E-M1II.
 

tkbslc

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Might be a lens I'm interested in picking up once cheap examples start to filter onto the used market.
It's already happening, as I got one for $350 used off FM forums (vs $460 with tax at current instant rebate price). It was in pretty much new condition, too.

FWIW, I've had really good focus accuracy and performance on the G85. It had a much better hit rate tracking a cyclist than my 35-100mm f2.8 (v1).
 
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wjiang

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Experiments: I think it could actually use a 55mm to 46mm step down ring (something I'll have to buy later) and a thinner lenscap like the LC46s which I personally prefer. That entire assembly would be smaller and share filters as well as shade a little of the element.
You missed my earlier post about this, 46mm is fine. I use two step downs to 46mm as a short permanent lens hood.
 
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Turbofrog

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You missed my earlier post abput this, 46mm is fine. I use two step downs to 46mm as a short permanent lens hood.
Good info. I'm guessing this is since it is a narrower FL on M4/3 than on APS-C, so there's no need to worry about mechanical vignetting?
 

Reflector

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You missed my earlier post abput this, 46mm is fine. I use two step downs to 46mm as a short permanent lens hood.
I only started to pay attention to the 56mm f/1.4 after getting one for a good price. Good to know that it can be used that way without having to do some experimentation.
 

speedy

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You're awesome.
I think your recovery time is going to be about half the average person.
Or less.
He he he. 11 weeks post op, got the green light to get off the crutches, & go 100% loading on the hip. Taking a little bit longer than I thought, physio & specialist tell me the thing that I need to work on the most, is my patience. :rofl::rofl: Pretty happy now though :2thumbs:

I can now start to give the 56 a proper workout, shoot some more interesting angles, when the weather starts to cooperate.
 

tkbslc

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I had bought an Olympus A-200 1.45x TC a while back for use on my 45mm f1.8 (also tried on 42.5mm f1.7). Since I already had it, I figured why not buy a step ring and try it on the Sigma 56mm. To my surprise, it works quite well. Better than on the 45mm. I'll try to post some samples later if the weather cooperates, as I all I have now are boring test shots of cereal boxes.

It's making me consider ditching my 35-100mm f2.8, since I mostly own it for the long end.
 

tkbslc

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Well the weather didn't cooperate, so here's the photos I took a couple weeks ago. I guess it was a choir program and not a cereal box. f1.4 has a small very sharp central portion and then gets kind of weird, almost more like field curvature. F2.2 is very usable to the corners.

Notice there's about a 1/3 stop light loss (Auto ISO)

f1.4 centers (With TC shot is slightly off center, center is toward bottom of frame)

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f1.4 corner

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f2.2 Centers

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f2.2 corner.

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Der@

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Hi. I was very excited about this lens that I've bought one just as it became available. I've been using it on my E-M10 and although the IQ is superb and the bokeh excellent the autofocus is not. Using it in dalylight @ f/1.4 (with an ND8 filter) the AF hunts quite a lot, struggles and fails to focus so many times that I'm missing a great deal of shots. This has taken me by surprise since everyone says AF is precise and lightning fast...it's not, at least in my case. It's simple the worst of all AF lenses I've ever used with this body. Please don't tell me I need a camera upgrade... :shakehead: Any thoughts? Did I got a lemon? Thanks in advance.
No I didn’t got a lemon... I have been using this lens with a used GX-9 recently bought with no issues at all. It seems that Oly AF system is fairly inferior.
 

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