Is there any "fish eye" distortion while using this lens on landscapes or close ups?
1473501
Yes. Just like most macro lens extentions there is a fish eye effect. Zooming in will bring it down some but the lens is curved to create the effect so it will take digital altering in the end for a non-warped image.
1473502
Yes it will definately cause barrel distortion. It will degrade the image. A cheap way to add a wide affect.
434662
The biggest aperture for this is F3.5, which is not that big. But it does give some bokeh effect. Whether it meets your definition of shallow DoF depends on you I guess. U might want to hunt around the web for sample photos?
196468
Not from what I have seen. At 100x, the distortion is beyond a focus adjustment.
1728847
There will be some distortion, similar to any lens up through probably 25mm. It is very subtle if noticeable at all unless you are right up on the structure. Easily correctable in LR5. Nothing like UWA or FE for distortion.
1936776
I've had absolutely no issues. This is my second most go to lens when shooting portraits. I prefer the 70-200 more, but that's just my style.
516476
Hi, I didn't really like this lens. It doesn't have the effect that I was hoping for. The lens cause an effect on the photo that I did not like, on both sides and its not a very good wide angle, if you are looking for an effect more like a fish eye as I did.
1534405
It's not a circular fish eye. The fish eye effect is mild at the 17 end. It is auto focus but like most pentax lenses it's a screw drive auto focus as opposed to having and integrated focus motor which is quieter and faster.
2273330
Fish Eye Lens Effect around BOTH sides - the only way to get rid of this is to zoom in far enough until it disappears and then leave it that way always. Also the color reproduction isnt very accurate.
1017760
You will need to find the sweet spot for straight lines (by tilting) in your composition. Sounds like your Sigma worked the same way.Fisheyes are like that :)
917658
IMHO.....the issues you mention are lens and not filter issues. I use my star filters on one of Nikon's sharpest lenses, the 35mm f 1.8 DX which according to some reviewers, has a boatload of barrel distortion. Who knew? All I ever get are razor-sharp contrasty, colorful images. For all practical purposes, unless you're making huge crops, none of the above "imperfections" are even remotely noticeable, and none are caused by the filters.
2227139
I used the lens extensively for landscape photos but also for interiors. It works pretty well with reduced, if any, distortion. Colors are consistent with white balance settings. Highly recommended also for interiors photos from "strange" or "naive" perspectives such as very high or very low positions, e.g. floors and ceilings to produce a different view of the rooms. Good photos also without any tripod by increasing the ISO to 800 and switching on the lights even with NO FLASH.
464431
The answer that I can give you is that I don't see major distortion when looking at the camera. It's a nice clean picture and have been happy with this product.
10431
Some people suggest 8mm fisheye, which is cheaper instead since you don't care the distortion mainly outside DX sensor. But if distortion is your concern, check some sample pictures taken from 8mm fisheye + DX cameras.
1356282
It doesn't get super close, but it's really damn sharp. If you want to get closer, I'd suggest Sigma's 28mm f1.8 macro (they also have a 24, a 50, etc.)The macros are reviewed well enough, may not be as optimal in the corners, but for center-frame macro shots, everything else will be bokeh-d out anyway. This is more of a perfect travel lens- sharp as anything corner to corner for the landscape shots, and wide f1.8 for the people shots, while still being practical and relatively distortion-free.
280005
The Sigma is an extreme wide angle, but not a fish eye. Straight lines will remain straight (almost). Autofocus works better on my D90 in bright daylight, worse in dim interiors where accuracy suffers.
1899082
I do not find any distortion at all. It's truly a good image. I am very happy with my purchase.
874722
I have not, but i would strongly expect a converer to smear detail on the corners. This lens, when focused properly, is very sharp in the corners. I use mine on a Fuji XE1 and now issues at all.