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Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE

Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE lens
 

Pełny rozmiar FF

Lenses that create APS-C sized image are designed for digital only. They cannot be used on cameras that have image sensor larger than the APS-C format. These lenses are not suitable for film cameras either.

 

Brak ultradźwiękowego AF

Obiektywy z napędem ultradźwiękowym autofokusa są cichsze i szybsze niż tradycyjne obiektywy

 

No stepping motor AF

Lenses with stepping motor focusing mechanism are better for contrast based focusing, and are quiter and faster than traditionally focusing lenses.

 

Obiektyw nie zawiera szkieł o niskiej dyspersji

Obiektywy zawierające szkła o niskiej dyspersji pomagają zmniejszyć abberację chromatyczną.

 

Bez stabilizacji

Image stabilization helps to reduce blur caused by hand shake, especially at high focal length or in low light situations. Image stabilization can give 1 to 3 stop advantage over none stabilized lens, based on the reciprocal rule.

 

Metalowe mocowanie

Tańsze obiektywy są zazwyczaj wyposażone w plastikowe mocowanie, podczas gdy droższe, profesjonalne obiektywy posiadają mocowanie metalowe. Obiektyw z mocowaniem metalowym warto kupić jeśli zakłada się częstą wymianę obiektywów, jeśli jednak aparat będzie używany zazwyczaj z jednym obiektywem, wówczas mocowanie nie jest takie ważne.

 

Brak wewnętrznego ogniskowania

Obiektywy z wewnętrznym ogniskowaniem nie zmieniają swojego rozmiaru podczas ustawiania ostrości.

 

The front lens is fixed

The fixed front lens is not rotating during zoom and/or focusing. This allows the photographer to use petal shaped lens hood. Fixed front lenses also make the use of polarization filters a lot easier.

 

Wspiera filtry typu Drop-in

Filtry wpuszczane typu Drop-in są używane w tych obiektywach dla których filtry nasadkowe są zbyt duże, lub pole widzenia nie pozwala zastosować tradycyjnych filtrów umieszczanych z przodu obiektywu. Ten typ filtrów jest zazwyczaj wspierany przez jasne teleobiektywy i ultra szerokokątne obiektywy.

Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE Specyfikacja

Dostępne mocowania Canon EF, Nikon F, Pentax K, Sony / Minolta A, Sigma
Zastosowanie Zbliżenia, Pejzaż, Efekty specjalne
Kategorie Rybie oko, Ultra szerokokątny stałoogniskowy
Mnożnik
Stabilizacja nie
Długość ogniskowej 15 mm (stałoogniskowa)
Konstrukcja optyczna 7 elementów w 6 grupach
Kąt widzenia 35mm: 180°
cyfrowy: 98°
Liczba listków przysłony 7
Maksymalna przysłona f/2,8
Minimalna przysłona f/22
Minimalna odległość ogniskowania 15 cm
Powiększenie 0,33×
Średnica filtra N/A
Wymiary ∅ 73.5 × 65 mm
Waga 370 g
Uwagi
Prędkość AF N/A
Dźwięk AF
Wewnętrzne ogniskowanie nie
Wewnętrzna zmiana ogniskowej N/A
Nieruchoma konstrukcja obiektywu tak
Typ mocowania metal
Uszczelnione N/A
Filtry wpuszczane tak
Ultradźwiękowy AF nie
Stepping motor AF nie
Zredukowany rozmiar APS-C nie
Szkła o niskiej dyspersji nie
Futerał na obiektyw (sztywny) N/A
Futerał na obiektyw (miękki) N/A
Osłona obiektywu N/A
Tripod adapter N/A
Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE Specyfikacja

Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE Recenzje

Other reviews

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Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE in the news

Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE Opinie

Najbardziej użyteczne opinie z Amazon

It's actually a very good lens!

6 May 2007

Hi, I just wanted to give this lens a fair review. As the other reviewer mentioned, if you use it with an APS-C sensor digital slr, you won't see a whole lot of distortion. It's no different from the Canon brand fisheye on a camera like that. But, if you use it with film, or with a larger sensor size camera, full-frame if possible, it's really quite a beautiful, sharp, and very fish-eyed lens. On a Canon 5D it performed really well for me. I just wanted to say that on the right camera, it's really quite a lens.

Use your brain and the right camera

5 July 2007

This is an excellent lens that does exactly what it's supposed to do. Optically, it's also excellent. You need to think seriously about whether you know what you're doing or anything about photography if you buy this for a Canon digital camera that's less than full frame.

You should probably stick to point and shoots until you understand lens conversion factors. If you don't understand digital crop factors and can't read basic specs, you either need to hold your money or find a dealer that you can trust to explain it to you. But the manufacturer shouldn't be accused of making a bad product because you don't understand the specs.

A previous user gives a poor rating because he either didn't read or understand the lens specifications. The rating was retain while most of the review was deleted because it simply didn't make sense. If you tried to use a 8x10 wide angle lens on a digital slr camera, you'd end up with a super telephoto because you're only using a portion of the image circle. Someone who calls this lens worthless because he bought first and thought later is blaming Sigma for his lack of attention to the laws of optics and of physics.

When you buy lenses for digital cameras, you have to take your brains out of your boots. This is a fisheye lens that's excellent on digital cameras, You get the full fisheye effect on a full frame digital camera --- OR at full 35 mm. You don't get the same effect on most DSLRS. When Panasonic Lumix claims 28mm lens width in its new line, it's not serious, but is referring to the apparent focal length when compared to 35mm film.

The lens can be used on cameras like the 20D or 30D which have a 1.6x crop factor. The news high speed top End EOS 1D Mark III will also have a crop factor of 1.3 while the 1ds and 5D are both full frame and will take full advantage of the 180 degree (on the diagonal) that this lens and other fisheyes offer. This lens is very good close to the optical quality of the Canon fisheye -- I've used both. But the game here is the intentional distortion on full frame. A standard wide-angle of this focal length does not cover 180, but something around 112 degrees -- on full frame.

If you want an equivalent of the 16-35 used a 5D on your 30d, you need to buy the 10-22. Both are rectilinear, corrected for distortion. Even the high end 1D doesn't get flll benefit of the fisheye due to crop factor. There are optical gimmicks if you want the effect, but that's not appropriate here.

The build quality of this lens is very good, not quite up to the level of the top drawer (and expensive) L lenses, but it is equal to Canon lenses for about the same price. It's difficult to use filters on this lens-- it isn't designed for them and filters would be makeshift -- and that big front element is vulnerable as with all of the real fisheyes. There are a couple of quirks that take a little getting used to in the controls for a regular Canon user.But I find it a little tricky going back to Leicas after too much time away -- and their controls vary with product. The images are high quality and a reasonably skilled photographer can produce excellent work with this lens without relyin entirely on fisheye cliches.

Users of digital cameras with crop factors should consider the shortest focal length fisheye lenses, approx 8 millimenters which also producs a 180 degree image, but in a circle. While I don't get the circular image on the 20D that I do the 5D it does give a lot of the distortion and on the diagonal approaches 180 with the rectagular image. I haven't measure it and don't have a reason.

The Sigma in a custom mount might produce interesting circular images on medium format film or digital sensors, but that would involve a careful matching of the mount to focal plane location. It is usually a waste of money to buy high end full frame lenses in shorter focal lengths for smaller digital sensors. You're paying for a lot of glass designed to cover a larger frame.

worthless

22 April 2007

If you are trying to use this product with a dslr like I was, dont expect to see distortion. For the price go with an 8mm fish.

Incredible Lens

12 August 2007

This lens is really incredible... The quality has always been great with Sigma and this lens is as great as Sigma's reputation...
If you plan to use this lens with a Digital Camera, do not forget that there is a x1.2 coefficient (this lens is a 15mm but used on a Digital Camera, it turns into a 18 or 20mm). If you want the effect of a fisheye (180degrees), consider buying a shorter lens (8mm).
The 15mm fisheye from Sigma is a great super wide angle if used on a digital camera...

Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE Przykładowe zdjęcia

Sigma 15mm f/2.8 EX DG DIAGONAL FISHEYE Akcesoria

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