If I don't tilt this lens down or up will it give straight horizon lines. I have an ancient Sigma 16mm fisheye lens that worked like that.
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 :)
1017761
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 :)
1017762
Yes, that is the way it works and the farther way from the center the upper and lower horizontal lines are bent toward the center of the lens. The verticals bend inward like all fisheyes. Mike
107211
It depends upon the lens (if it's a prime), and/or the focal length (if it's a zoom).I frequently use the excellent 35mm f/1.8 DX lens in FX mode on my D700. There is certainly some fall off at the corners, but it works well for my uses (location portraits, and indoor people events).
1833849
Just beware of putting subjects on the edge of the frame when @ 17mm - 25mm. You are going to get horizontal distortion, not a ton but its not flattering to those on the side. No one would ever notice this on a landscape photo but when its a person... Pretty easy to fix in post if you have a decent software. Its a great lens though!
674237
Yes. Tripod does allow camera to point straight down (and straight up) nearly 360 with the exception of when pointing down, where the camera lens lines up with elevation lock screw or when pointing up, where handle lines up with tripod leg.
643480
This lens has a fish eye perspective at all focal lengths, but it is most pronounced at the wider focal lengths (between 10 and 15mm). At 16/17mm, the fish eye is not particularly prominent and if you are not taking photos of architecture, you might not notice it as much. If there are a lot of straight lines in your photo, you will notice that they curve, at least a little bit, at all focal lengths.Hope that helps.
2112171
Basically, when you point the camera to a distant target (like a cloud, stars or the horizon) and you can focus on it successfully. Keep in mind that there are lenses with distance rings that can 'focus' before or past infinity. This doesn't necessarily mean the lens is not calibrated, in some lenses this is to allow for thermal tolerances.In case of adapters, if you have a lens that can focus to infinity just fine in a camera; but can't in another once is attached to an adapter, then the adapter itself might be defective. While rare, it doesn't take much of an error on flange distance to cause focusing errors in that case. Basically, when you point the camera to a distant target (like a cloud, stars or the horizon) and you can focus on it successfully. Keep in mind that there are lenses with distance rings that can 'focus' before or past infinity. This doesn't necessarily mean the lens is not calibrated, in some lenses this is to allow for thermal tolerances.In case of adapters, if you have a lens that can focus to infinity just fine in a camera; but can't in another once is attached to an adapter, then the adapter itself might be defective. While rare, it doesn't take much of an error on flange... » Read More Basically, when you point the camera to a distant target (like a cloud, stars or the horizon) and you can focus on it successfully. Keep in mind that there are lenses with distance rings that can 'focus' before or past infinity. This doesn't necessarily mean the lens is not calibrated, in some lenses this is to allow for thermal tolerances.In case of adapters, if you have a lens that can focus to infinity just fine in a camera; but can't in another once is attached to an adapter, then the adapter itself might be defective. While rare, it doesn't take much of an error on flange distance to cause focusing errors in that case. « Show Less
1783773
I have it for my dx frame and don't see any vignetting. I would imagine it would do that in you fx frame. But honesty its a fun lens.
856431
If your question is about Image Stabilization. The lens does not have this feature.
761808
Don't know. Did you adjust horizontally, the lens housing separates in the middle.
1060549
I've never personally used the filter on a sigma lens, but I'd assume it works the same as on a Canon lens. You will notice that the filter has two moving parts and that the front ring spins continually. The the back ring that is attached to the glass should tighten onto your lens and become secure, while the front ring will continue to spin even after the rear ring has been tightened.
454848
As others have said, the answer is yes. While you do loose the wide angle effect, you are gaining the "fish eye". I've had a lot of fun with the fish eye lens. and would recommend it.
203736
I bought this lens because of the collar, focal length, and optical sharpness. The collar allows one to easily switch from horizontal to vertical format without having to remove the camera from the tripod. You could probably have the collar removed by a competent repair shop. To each their own!!!!
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.
1936779
My lens is excellent. Though I think most people don't understand lens/camera relationships. Some people think that if a lens back focusses it must be quality control issues. But ever end will have slightly different behavior focus with different cameras, even if those cameras are the same model. My copy is outstanding, but it has different focus micro adjust on each of my 3 cameras. This will be true of any lens. Not just sigma.
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.
711822
Depends on the subject and lens degrees. The tilt on the top section can be adjusted more than 90 degrees, but with a wide angle lens, the tripod feet can get in the way. I bought it to get closer to the ground when shooting beach shots. It works great even with a 8mm fisheye lens, but I have to adjust it to keep the tripod legs from interfering. So far it has exceeded my expectations. I will say with a heavier camera body and lens, you will need to lock down the trailing tripod leg to keep the camera from tipping forward. It is still a great buy.
1354146
It depends on how close you're talking about. 17mm isn't extremely wide like say a 10mm but it should unless you're standing really close to them. With any focal length running in that range you're still apt to get the occasional focal distortion such as rounded edges. To me it's still maybe my favorite lens that I've ever owned.