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Posts Tagged ‘fish-eye’

I decided to take a shot at a full frame fish eye lens and utilize the Adobe lens profiles in both Photoshop and Lightroom to correct the heavy barrel distortion prevalent in fish-eye designs. Years ago I had a Canon EF 15mm 2.8 full frame fish-eye. When I jumped to DSLRs I initially had APS/C crop sensor bodies. The 15mm made little sense on those bodies but performed well with my EOS film cameras. A few years ago I had all but abandoned film and have been shooting mostly with 5D variants which are full frame DSLRs and with the little EOS M series cameras for travel and fun.

I have a Sigma 8mm circular fish-eye that produces a full 23.5mm circle inside the 35mm frame or full frame sensor. This lens is similar to the Canon EF 15mm on the little APS/C cameras with slight vignetting at the very corners. I still have that lens but trying to shoot real estate photos with an 8mm lens and then using the distortion correction to get a full frame flat field photo is asking too much. First of all a 23.5mm circle crops away about half of the full frame. My 23 megapixel sensor is only using 11.5 mp with the 8mm. 11.5 mp is adequate until you start asking software to manipulate the pixels.

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Samyang 12mm shot with Canon S110

Although most of my images are fun and made with my EOS M3, I do shoot professional grade photos of all my listings and the listings of several other local Realtors® in the area. For that, I use my 5D Mk II and a series of lenses including the amazing Canon 16-35mm 4.0 L IS. (reviewed here). I really want to buy the Canon 11-24mm 4.0 L. But honestly at $3000 clams it is a big pill to swallow. But that 11mm low distortion is amazing! I decided to consider a Canon EF 15mm 2.8 or another maker’s wide-angle lens with the intention of using the distortion correction in Lightroom to flatten out the field. Along the way as I searched for lenses I stumbled across an ad for the Samyang 12mm 2.8 full frame fish-eye lens. I had to check three times to make sure it was a full frame lens and not a lens made for APS/C. Sure enough it was a full frame lens! I had never seen a 180 degree full frame fish-eye with a focal length wider than 15mm.

This lens is much wider than the 15mm. Even though both lenses use optical barrel distortion to cover an identical 180 degrees at the corners, the 12mm Samyang has a wider horizontal and vertical coverage as it is in fact a 12mm lens. This also indicates that there is less barrel distortion and thus should be easier and sharper when corrected. I decided to try it out. It is not a cheap lens by any means, but it is less money than the EF 15mm 2.8 by a fair margin.

This lens directly mounts to any EOS camera body but does not offer any electronic coupling. But seriously if there is any lens you have to manual focus, a crazy wide fish-eye is the one to use! The depth of field even wide open is about 3 or 4 feet to infinity. The real question is: “is it sharp”? Well my friends, yes it is, very sharp. In fact this lens is noticeably sharper than my old Canon EF 15mm 2.8. The lens is very crisp right to the ragged edge of that 180 degree corner. When correcting the distortion you do lose some resolution, but compared to the 15mm Canon lens it is night and day. The Samyang just kicks ass.

So now I have a lens that makes full frame fish-eye shots with all that crazy barrel distortion which can be loads of fun in cities and dense forests, and I have a lens that offers similar, possibly wider, “straight line” ultra wide-angle coverage to the Canon 11-24mm. All for about $500 give or take. In all fairness the Canon 11-24mm L lens is superior, especially when making the distortion correction, but the Samyang 12mm performs better than any fisheye I have ever tested and I have owned a FD 7.5mm, FD 15mm, Sigma 16mm FD, Sigma 8mm FD, Canon EF 15mm, Sigma 8mm EF and this Samyang 12mm. The Samyang is the best, it’s just that good.

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Samyang 12mm on 5d Mk II at f 8.0 ISO 400, closest leaf is 2 inches from lens, focus set to @8 inches.

What I understand about this lens is that they use a “stereographic” projection rather than the typical “orthographic” projection for the fish-eye effect. This lens does not have as much of the crazy fish-eye look as a Nikon 16mm or Canon 15mm. But it is sharper right out to the edges than either of those lenses.

I took a couple of quick shots in the living room to showcase the 12mm lenses coverage. Now there are a few caveats, first I had to hit the room with a flash pop as it is a dark room and I did not want to drag the shutter and blow out the windows. For the shots taken at 16mm, no worries as the flash diffuser covers down to 14mm. The 12mm both corrected and full 180 has some strong vignetting. This is flash vignetting, not lens vignetting. The lens it self only seems to lose about 1/2 to 1 stop wide open at the corners which is easily correctable and barely noticeable on film. I did attempt to correct the flash vignetting as best as possible. Also I haven’t downloaded Adobe’s updated lens profiles as I need to update my copy of Lightroom. I used the Canon EF 15mm lens profile for the distortion correction. It is good but tends to slightly overstretch the image near the edges, but with the new Samyang 12mm profile it will be much better!

So here are the shots taken in the living room, just quick snaps although mounted on tripod to keep camera in fixed location. The Canon 11-24mm lens offers 126 degrees of diagonal coverage at the 11mm setting. The 16mm setting shown below offers a touch over 108 degrees. The Samyang 12mm uncorrected yields a full 180 degrees corner to corner. I am not sure what the diagonal coverage is when the distortion is corrected but it is much wider than the 16mm and it is wider than 14mm because the flash still vignettes.

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Canon 16-35mm 4.0 L IS at 16mm f8.0

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Samyang 12mm at f8 distortion corrected

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Samyang 12mm at f8 uncorrected

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Fun with the Fish-eye

Over the years I have owned several fish-eye lenses. These lenses tend to create an abstract view by making no effort at all to correct for the ultra-wide angle distortion curve. Where an ultra-wide rectilinear lens had engineers go to great extent to correct this distortion, fish-eye lenses do the opposite. This need to correct distortion is one of the things that makes full frame lenses wider than 20mm either expensive or crappy.

Manufacturers use exotic glass and materials in these ultra-wides to correct the distortion and that leads to high prices. You really can’t get away with a cheap ultra-wide. But fish-eye lenses are a different animal altogether. These lenses do not require any exotic materials. It is possible to get decent results with a fish-eye lens that is modestly priced. The glass elements are still more expensive than standard lenses between 28mm-100mm full frame. Primarily the difference between a cheap fish-eye and a pro-grade fish-eye will be in absolute sharpness and lens flare.

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Nikon 6mm f/2.8

There are three basic types of fish-eye lenses. There are fish-eye adapters that attach in front of a regular lens. These are usually cheap quality but can still be fun. There are a few high quality fish-eye adapters. Don’t be fooled by the super-cheapies, a 0.25x or less is required to have a “real” fish-eye effect with a modest prime lens behind it. Next is a full-frame fish eye. Don’t confuse the use of the term full-frame as meaning full-frame digital cameras. Full frame fish-eyes generally have 180 degrees of coverage from the corners across the diagonal of the image. On a 35mm equivalent camera theses lenses are generally 15-16mm focal length. The third type is the circular fish-eye. This lens on a 35mm equivalent body will have a focal length of 7mm-8mm. This projects a full 24mm circle with a 180 degree view inside the frame. These lenses will waste a lot of “space” since they will not use the whole frame. There are a few exotics such as the ultimate fish-eye, the Nikon 6mm f/2.8 that is a circular fish-eye. The lens that covers 220 degrees in all directions. This lens sees behind itself! This lens was created way back in 1970 and one of them recently was offered for sale at $160,000 and was quickly snatched up by a collector. Yes there is a lens that you could consider that might put you in the dilemma of having to choose between and Audi R8 or a lens 🙂

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Canon 7.5mm f/5.6 fish-eye, scanned from 35mm Ektachrome slide, Safari West, Sonoma County, CA circa 1993

I have owned two circular 180 degree fish-eyes, two 180 degree full frame fish-eyes and a few fish-eye adapters. They all have their place. Back in the eighties I had two Sigma fish-eye lenses. I had the circular 8mm f/4.0 and the full frame 16mm f/2.8. The 8mm was a pretty good lens, it was a full stop faster than the Canon 7.5mm f/5.6 but I later owned that lens also and the Canon was a sharper lens. The Sigma 16mm turned out to be a great lens, I never bothered to buy the FD 15mm f/2.8 from Canon. After switching to auto-focus in the 90s I bought the Canon EF 15mm f/2.8 and that was a great lens as well. Today I shoot with a Nikon fish-eye adapter that actually has more than 180 degrees of coverage depending on what lens it is in front of. It is the FC-E9. It is designed to work with video and smaller sensor cameras so it has some weird focus issues on full frame sensor cameras. I am currently using it with an old SP 35-80mm Tamron zoom. That lens has super close focusing ability which seems to help overcome the focal length issues and infinity focus.

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Montgomery Street, San Francisco, CA with Sigma 16mm f2.8 fish-eye, circa 1985 scanned from Kodachrome 64 slide

Honestly you can find that old Sigma 16mm 2.8 pretty cheap at camera shows or on EBAY. They run about $150-$200. That was a great lens and you can find it in most manual focus 35mm camera mounts. These lenses really need to be shot on a full frame 35mm equivalent camera like a Sony A7 or something because without the full 180 degree view it will just look like a cheap wide-angle. That said the circular fish eye lenses can be effectively used on micro 4/3 or APS-C bodies as they will look like a full frame fish-eye on those cameras. Sigma still makes both a circular and full frame fish-eye lens for modern cameras and they make them for crop sensor cameras as well. They tend to run in the $300-$800 price range with the circular models being at the higher end.

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Cheap $15 fish-eye adapter on EOS-M with 18-55mm

I traveled all over the United States back in the 80s and 90s, carrying both the circular and full frame fish-eye lenses. I captured many of America’s biggest cities with that awesome abstract viewpoint only afforded by a fish-eye lens. There are many fun things one can do with a fish-eye lens. It doesn’t have to be expensive, even a super cheapy like the one I have for sale on EBAY at $15 can be fun.

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Nikon FC-E9 weighs 1.5 lbs!

I shot a few images through my Nikon FC-E9 0.2x adapter and frankly I don’t have the right lens for this product but I still got some cool images. It was designed for Nikon Coolpix cameras not DSLRs. With the “longer” focal lengths in larger sensor cameras this lens has some strange focus issues that require a close focusing lens to get infinity sharp. I know that seems weird, but it’s true none-the-less. It works well with my EOS-M and the 22mm pancake, but I am afraid to mount it to the lens since it is so heavy, I just held it in front of the lens for the test. In the shot with the red flower some of the leaves are laying flat up against the glass, the flower is less than 1/2 an inch (12mm) from the glass! In the image where I am looking straight up a couple of stray raindrops landed on the lens and they are almost sharp! The Nikon FC-E9 is big and bulky and HEAVY, so I won’t mount it to an AF lens or a lens with plastic filter threads. It is sharp and crisp however and seems to be flare free.

The bottom line remains that if you want to horse around and have some fun, a cheap fish-eye adapter can provide that. If you want sharp crisp images you should look at some of the real lenses offered for most system cameras.

Here are some fun fish-eye shots.

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Embarcadero Center, circa 1985 Canon F1n with FD 7.5mm f/5.6

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Embarcadero Center, circa 1985 Canon F1n with FD 7.5mm f/5.6

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Nikon FC-E9 mounted to Tamron SP 35-80mm focus set at about 1.5 feet to get infinity. Rain drops on the glass are near sharp!

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Nikon FC-E9 mounted on Tamron SP 35-80mm, yes that is my foot in the picture!

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Not kidding the leaves in the lower left are on the glass, flower is less than 1/2 inch from lens. Nikon FC-E9 on Tamron SP 35-80mm

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