Rokinon300M-MFT-BK 300mm F6.3 Mirror Lens for Olympus Pen and Panasonic Interchangeable Lens Cameras - MFT

This is good if you know why you need it. Excellent quality for the money.

If you are prepared for what you're getting, this is a cool lens. It won't make the sharpest images, it's very hard to use handheld, and it has a surprisingly thin depth of field - all of which means one has to focus very carefully and take a lot of shots to get one good one. At ten paces, if your subject moves even half a foot it'll be out of focus. But when you get it, maybe one shot in five, it works great. I still like the funny little donuts; if you don't like them, you have to be careful about background. Handheld, I've rarely gotten a good shot with longer exposure than 1/500th, but fortunately it has a big enough entrance pupil that one can do this (at least on the fuji x-t20) without pushing the ISO too high. It is surprisingly useful for macro (field of view on the X-T20 is maybe three inches at a meter away?) albeit with such a thin focal plane you have to actually want that effect. See the sample of a succulent. Since the focus doesn't turn quite as gently as one might like, it can be hard to get the perfect plane on distant shots, even using focus aids; it would be nice if the ring turned about twice as far as it does. The focus also drifts a little (maybe pressure inside?). And, it's annoying that it focuses beyond infinity... I'm not sure why this is the case, unless it's because they make different mounts for the lens and didn't bother realigning for each mount or something. So, three minor defects = minus one star, but even that feels a little bit mean, because it is awfully small and light and cheap for a lens so long. I've read that the Samyang/Rokinon build quality is inconsistent, but the one I got has no dust or smears or anything I can find wrong with it. All the samples accompanying this review are handheld on a Fuji X-T20.

I bought this back in November and only just now tried it out and realized it doesn't fit my Canon Rebel T3i. Anyone have a lead on an adapter to get it to fit my camera? I'm just using it in Manual mode. I'll take any help I can get. (lens mount type to Canon EOS Rebel T3i mount nomenclature, etc) Thanx!

This is a nice compact telephoto option for the Sony NEX cameras. I use mine on an A6000. If it were allowed, my rating would be 3.5 stars. It has all the benefits and downsides of a well made mirror lens.The good: It is small. It is about the same size as the Zeiss 16-70, but much lighter. If you nail the focus, it is also capable of some excellent results. The dog and geese are the full view, but the kestrel shot is an extreme crop.The bad: Most of the bad is just a fact with mirror lenses in general. First, the lens is manual focus and has one aperture setting, 6.3. At 300mm, that is a shallow depth of field. You need to nail the focus, using the focus assist zoom. Focus peaking will get you a pretty good shot if you fill the frame, like the dog and the geese, but a shot like the kestrel requires that you use focus assist. This is not for a quick grab shot, and count on quite a few misses.Also, there is the absence of any optical shake reduction system. This means you need to use this lens at a high shutter speed, no less than 1/500, preferably higher. It also means that the view is very shaky when you use focus assist.Then there is the odd donut bokeh (out of focus highlights) of a mirror lens.You can see this in the photo of the geese.This lens is not the performer of my best ED 300mm F/4 autofocus DSLR lens, but it is about 1/3 the size and 1/4 the price. It is comparable in sharpness to a 70-300mm zoom at 300mm but with no autofocus. It is also a good fit to the A6000, and goes places I would not take my larger birding rig.

This lens pretty much is exactly what other reviewers have said. It takes remarkably sharp images for a mirror lens, but is difficult to nail the focus when shooting handheld on anything that is not a large distance away. In spite of the previous reviews, I took a chance on this lens to use as a walk around super telephoto on my Canon M6. I found the same difficulty focusing that others had reported, making it unsuitable for that. If you put this on a tripod and and have a non-changing subject at a fixed distance, this lens gives great results. Although it is very lightweight and otherwise would be great for walking around, I can't recommend it for that.

I love it. In th canon ef-m you may have to enable a setting in custom functions to allow the shutter to function without a detected lens. This is a 100% manual lens so the camera can't "see" it. Focus peaking works but the FOV is so short that it's hard to spot.It is a crisp, sharp lens. Very long focal but compact, ofc. At this length I was still able to shoot some pretty low-light outdoors stuff at high ISO, handheld. I would need to use a tripod for any lower light tho. Still a great lens but at 300mm you need fairly high shutter speed (1/125+) to avoid any shake.The attached photo is a scaled (reduced size) import from the camera, no post processing. Just JPG from the raw CR3. Great color, no visible abberation.Lens comes with a hard plastic hood, which stores in place, is usable for the focus ring. Also ships with an OK lens bag and caps for both ends.

I'd read positive and negative things about mirror lenses in general. Decided to try this one, least expensive way to get to 300mm on Micro 4/3. It is manual focus, and fixed aperture. Turns out that's easy to use. I believe "shoot without lens" was already on. So all I had to do was set aperture priority, f/6.3. There are a couple of ways to make the view magnify to help in manual focus, I like left button on the controller, then center (on my Panasonic G10, may differ on other micro 4/3 cameras). Pictures have been surprisingly good even hand held as long as the shutter speed is high enough (1/500 second). Contrast is better than I feared it would be.I used to have a film SLR where every lens was manual focus. Using this felt natural, almost nostalgic. I was surprised by that. Results in daylight of all very distant scenery, or of something close but with a very bland background, are very good. However, you know out of focus points of light turn into donuts instead of circles with any mirror lens. So pick your scenes.

Hay que comprender qué es lo que se está comprando. Es un lente con espejo y por eso pesa tan poco y es tan barato para ser un 300mm.Obviamente por ser un lente con espejo, la apertura es fija de 6.3 y es complicado de utilizar con poca luz. Yo lo encontré utilizable con una velocidad de disparo mínima de 1/100. Te recomiendo que lo uses solo en días soleados.Es manual, es decir, no tiene AF. Sin embargo, esto no significa que no sea un lente “original”. Solo existe un modelo de este tipo de lentes con AF y es Minolta.Por eso, sacar las fotos en foco es un poquito complicado al principio pero con el uso se va haciendo sencillo. Yo la uso con una Sony, así que tengo focus peaking y se vuelve mucho más sencillo.Está súper bien construido. No se siente nada mal y pesa muy poquito. La única desventaja de diseño sería que el anillo de enfoque es muy grande y suelo mover el punto de enfoque con facilidad con el simple hecho de agarrar fuerte el lente.En cuanto a la calidad de imagen. Es buena nada más. Los colores son planos y la nitidez es buena (sí está en foco).Leí que no era nítido a largas distancias pero esto es normal en cualquier telefoto largo. Hay que considerar la neblina atmosférica (como cuando ves una montaña o edificio muy lejano y se ve “opaco”). Considerando el tamaño de sensor APSC, este lente te da un equivalente de 450mm y es normal que tomes fotos de cosas muy lejanas y se vea esta neblina. Sin embargo, los problemas de color, nitidez y hasta la neblina se pueden quitar en software como Lightroom o Photoshop si tomas las fotos en RAW.En conclusión. Es una súper ganga.

Como toda la línea Rokinon, es un lente de excelente costo y buena calidad. En el caso de este lente, en realidad no es malo. Al ser catadióptrico es muy sensible a las vibraciones, así que preferentemente hay que utilizarlo con un tripié. El tema es que, cuando los puntos luminosos están desenfocados (bokeh), se presenta el efecto de "dona". Esto no es malo en sí, es parte del funcionamiento de la lente. Es una cuestión de gustos. Algunos lo encontrarán "artístico" y otros dirán que la lente es "inutilizable". La gran ventaja de una lente de este tipo es su baja, casi nula aberración cromática.

Compacto y ligero, increíble que tenga 300 mm de focal. Y la calidad de imagen en retrato y paisaje es muy buena (Canon EOS M6), eso sí siempre debe de utilizarse tripié para que la imagen sea nitida. Acepta filtros de 58mm. Apertura constante f/63.Muy recomendable.

Es un excelente objetivo a pesar de ser de enfoque manual.Como recomendación usarlo siempre con tripie y de preferencia con un disparador remoto.

Like: light and compact.Dislike: hard to focus