Pourquoi 5 étoiles, parce que cet objectif permet pour une modique somme d'argent d'aborder le domaine de l'ultra grand angle, il reste vrai qu'il ne manque pas de défaut, la qualité de netteté sur les côtés n'est pas au rendez-vous, avec une ouverture réduite, mais il reste surprenant du résultat obtenu, un réglage d'une grande simplicité, un enconbrement réduit, que demander de plus, tout cela pour débuter dans ce domaine à moindre frais, permettant d'envisager l'achat dans une gamme supérieure si cela vous plaît.

Review by Edgar (USA) says it all. I bought one to add versatility to a second-hand Olympus OMD E-M1. It has a permanent place in my day bag. Samples attached. Tilt the lens relative to the subject - up, down or to the side for different comic or creative effects. Highly recommended.

Esta tapa/objetivo solo tiene enfoque manual. Su objetivo de 9mm f8 (no se puede cambiar la apertura) es un ojo de pez, es decir, distorsiona la imagen intencionadamente para dar una sensación de estar mirando por una bola de cristal, y corresponde a un 18mm en full frame. Da una calidad de imagen excelente a muy buen precio, sobre todo teniendo en cuenta que lo compré en las ofertas de Primavera de Amazon.El enfoque se realiza con una palanca en la parte inferior del objetivo. Al tratarse de un ultra gran angular la profundidad de campo es alta en casi todas las distancias, por lo que enfocar manualmente con la ayuda de la cámara es bastante sencillo.Por último, el objetivo es muy compacto y pesa poco por lo que si se quiere un ojo de pez económico y fácil de transportar este objetivo es una buena opción.

This is a review of the 9mm f8 body cap lens. Small, light, cheap, easy to slip into the gear bag? Yes to all of them. I also have the 7.5mm Samyang fish-eye, and the Olympus 15mm body-cap lens. So I have some frame of reference.The 15mm body-cap lens is very good and I recommend it. As we all know. micro 4/3 focal lengths have to be doubled to get the 35mm equivalents. So the 15mm body cap lens is equivalent to 30mm - almost a wide angle. Minimal distortion, and I use it for fireworks shots.The new 9mm is very similar in operation. No filter mount - no need for a filter. No removable cap - no need for a removable cap. The glass area is small, so the chance for harm is small. Focusing is manual, but difficult to get wrong in view of the natural depth of field from an f8 lens with fixed f8 aperture (if you are in doubt, the hyperfocal is one click past the infinity setting). The pictures are good with some of the classic fish-eye distortion of verticals (see my photo attached). And when you use a fish eye, that is what you are looking for.My 7.5mm Samyang does distort more than the Olympus 9mm. And the Samyang feels nicer to use - but at the end of the day. the Samyang costs more and is heavier - so there is a greater chance that you will be carrying the 9mm rather than a larger lens.Fish eye lenses should be used sparingly - or else the effect gets boring. On this basis, it makes sense not to overspend on the fish-eye. And on that basis, if you have a micro 4/3 body, then the Olympus 9mm will be a good addition to your kit bag. Recommended.

Excellent results with this lens. Lot's of bang for the buck!

I bought this one and the cheaper 15mm f8. I keep them on my two micro four thirds bodies except when I have reason to put something else on. They are decent body caps and keep your sensor clean. And in a pinch, they take pictures. That was my original thinking. In fact, I enjoy shooting through both of them. The 15mm version is a rectilinear (meaning normal wide angle view) lens with more barrel distortion, coma, chromatic aberrations, etc than you are used to. I'd say its 3-element lens is not as good a performer as this one. This one has a five-element lens. Both products are reported to have glass, rather than plastic, lens elements. This one also falls short of being a true fisheye, offering only a 130- or 140-degree field of view, as opposed to the 180 degrees of a true fisheye. But you do get the fisheye effect, thanks to MAJOR barrel distortion. The thing about fisheye lenses is that you don't wan't to use them very often, and they usually cost a lot of money, so few of us have them. This little guy solves that problem. Also, I don't much like pictures from true fisheyes. The more subdued distortion of this lens fits my taste better. (Sample pictures got mild processing with OS X Photos app, including sharpening.)

Very happy to have it.

This cheap lens has quickly become one of my favorite m43 lenses. It's tiny, it's sharp, and the perspective matches the human field of view better than any wide-angle lens I've ever used.So if you take a picture in a room with this lens, it represents how the room actually looked and felt in terms of space and distance, preserving the proportionality. Most ultra-wide lenses stretch things unnaturally at the edges, and most other fisheye lenses have a much more pronounced fisheye effect, bulging the center out. This lens seems to find the perfect balance.In summary, this lens is a blast to use, and it's one of the best values I've ever found in lenses.----------------The following is a detailed comparison I did on Pentaxforums between this "toy" lens and one of the best Ultra Wide Angle zoom lenses out there...the Sigma 8-16mm. Unfortunately, Amazon reviews do not post the full-sized images, as referenced in the review. My original review, which includes full-size pics, is titled "Just for fun: SIgma 8-16mm (K-mount) vs Olympus 9mm f8 fisheye body cap lens review"I've decided to go to a dual Pentax DSLR / m43 system, but since I'm not made of money, I've had to make some difficult decisions regarding my DSLR lenses. I sadly sold my Sigma 8-16mm a few days ago, and I'm trying to decide between the Olympus 9-18mm or the Panasonic 7-14mm lens to replace it.In the meantime, I found out about the Olympus 9mm fisheye "body cap lens", and figured that for the price it was worth a try to hold me over until I re-acquire a proper UWA lens. So how does an $88 body cap compare to the widest rectilinear lens available for APS-C cameras? For the price, better than I thought!I've attached a couple pictures of the lens...er, body cap, mounted on my Panasonic GX7The first two sample pictures are photos I took within minutes of unboxing the lens, as I was walking to meet my kids at the bus stop. The school bus picture had the top and bottom cropped, but it has not been resized; and the car picture is not cropped or resized. So if you click on the pictures, you can download the 100% picture to pixel peep it. [Full size pictures not available on Amazon reviews]When I got home and loaded the picture onto my computer, the thing that amazed me is how sharp they were throughout most of the center part of the frame.So the lens is usable, but how does it compare to the mighty Sigma 8-16mm? Well, in overall image quality, the Sigma definitely wins. The Sigma is sharp edge-to-edge, and has better contrast than the little fisheye. When shooting in RAW, you will probably want to add some zing to the fisheye pictures.So if you're wanting to shoot an ultra-wide angle just for fun, and/or you won't be printing large images, then the Olympus lens can provide a lot of utility. But if you're doing critical work, then you'll definitely want to use a real lens.The other thing I was curious about is the comparative angle of view of the two lenses. I was under the impression that the fisheye would be a little wider, since the 8-16mm is supposed to have a 121 degree angle of view on APS-C, while the fisheye supposedly has 140 degree angle of view. But in practice, it seemed like the lenses were very evenly matched. In fact, it seemed like the 8-16mm captured a bit more at the left and right edges, but I don't know if that's really a fair comparison, since the APS-C sensor is wider side-to-side than the 4/3 sensor.The big difference is the way the two lenses capture the wide angle. The Olympus fisheye shows a lot of barrel distortion in the middle, and curves the edges of the frame, while the Sigma gives you straight edges, but gives you kind of a pinched view, with objects at the edge stretched and objects in the center of the frame shrunk.I've never used a fisheye lens before, but my understanding is that the Olympus is not quite a true fisheye, since it does not provide a 180 angle of view. As far as I'm concerned, this mild-fisheye makes the lens easier to use in more situations since it is not too exaggerated. Depending on the scene, it may not even be obvious that the lens is a fisheye.Here's a couple comparison pictures, and again, you can click for a full-size image. [You will need use the link above to view the Sigma/Olympus comparison pictures.]I'm not sure that I prefer one approach to the other. The fisheye is cool with some scenes, but in other cases it just looks strange. And kind of the same thing with the 8-16mm.One thing I do appreciate from the fisheye is that the proportions of a scene are better preserved. These next two images demonstrate that characteristic.In the bedroom picture, the fisheye picture does a pretty good job of representing the actual size of the room. But in the Sigma version, the room looks larger than it is, since the bed is shrunk and the floorspace in front of the bed is stretch. And in the Sigma picture, the little mirror in the corner looks huge.I think that either picture looks okay, but if these pictures were used for real estate purposes, the Sigma picture could be considered a bit misleading since it seems to add square footage to the room. (BTW, that is something I have noticed with some real estate pictures, and it always annoys me.)For the second picture in my home theater area, both lenses were kind of a fail. Again, the Olympus picture does a good job of showing the relative size of the speakers to the screen, etc, but it just looks bizarre seeing the screen and speakers curved like that.And the Sigma does a good job of keep the lines straight, but the screen looks tiny and the center speaker look tiny, and the L/R speakers look huge. And since they are canted a bit to aim towards the center of the seating area, the rectilinear lens makes them look oblong.And for the sake of comparison, I've included a more normal shot showing pretty much how the home theater area appears in person. This picture was taken with my Olympus XZ-1 at 30mm equivalent:So for everybody who has been dying for a comparison of those two lenses, there you go!I'll finish up with a few pics comparing the physical dimensions of the Pentax K-30 & Sigma 8-16mm combo to the Panasonic GX7 & Olympus 9mm fisheye combo. (These pictures were courtesy of my old Olympus XZ-1 since that's the only other camera I have with a hotshoe!)It still blows me away how little this thing is! There's been many times when I wanted to take my 8-16mm along, but I just couldn't bring myself bring add a 3rd heavy lens to my normal two-lens kit. Now I'll just be able to slip this little guy into a pocket or something, and forget I even have it with me until I want to use it.

Very quick delivery. Fisheye is very usable and fun.

Excellent product and came with good packaging.

I bought this even though people gave it so-so reviews. I'm glad that I did, great lens for the price, the hyper-focal setting (they call it "infinity focus") works great.

lots of fun and great results for the price.

Per il costo contenuto di questo magnifico grandangolo fish-eye (140°) si compra un obiettivo di qualita' ottica entry level ma piu' che adeguata ad iniziare un tipo di fotografia estremamente suggestivo. La manualita' richiesta (fuoco a due gradini, luminosita' modesta e fissa) costringe ad una ripresa ragionata. I risultati sono molto buoni (cavalletto e discrete sensibilita' spesso indispensabili). Il bianco e nero, grazie anche ad una ottica sorprendentemente contrastata e precisa, e' gradevolissimo e suggestivo. Complimenti sinceri alla Olympus per aver prodotto una ottica coraggiosa, abbordabile, divertente ed intrigante. La comodita' e' poi grandissima perche' ce lo si puo' portare sempre dietro in quanto e' sottilissimo (quanto un tappo di obiettivo) e trova facile posto anche nella piu' piccola custodia.