Comparison: Tokina 10-17mm & Canon 8-15mm fisheye with native Zuiko 8mm on EM5MIl

Started Jul 13, 2018 | Discussions
Architeuthis Regular Member • Posts: 251
Comparison: Tokina 10-17mm & Canon 8-15mm fisheye with native Zuiko 8mm on EM5MIl
3

Here is a comparison of the image quality of the Tokina 10-17mm and Canon 8-15mm fisheye lenses adapted to Olympus EM5MII camera with the native Zuiko 8mm Pro fisheye.

An initial test of the Metabones 0,71x Canon EF to MTF speedbooster (MB_SPEF-M43-BT4) with the Tokina 10-17mm fisheye lens was disappointing, especially over water ( https://www.dpreview.com/forums/thread/4267346 ), but also under the surface performance was not so good, although image quality was somewhat better ( http://wetpixel.com/forums/index.php?showtopic=61629 ). Therefore I acquired a Canon 8-15mm fisheye, the Metabones 1x smart adapter and a Kenko 1.4x Teleplus Pro 300 Teleconverter and tested out different combinations of these on the surface and compared to the native Zuiko 8mm fisheye Pro (that is however a prime lens without possibility to zoom out). Automatic exposure compensation was performed in Lightroom.

First the results @8mm focal length (diagonal angle of view is 180o):

#1.: Here a comparison of the full images at wider aperture (f 2.8):

Zuiko 8mm; f2.8; 1/2500; ISO200

Tokina with 0.71x booster @8mm; f2.8; 1/1600; ISO200

Canon with 0.71x booster @8mm; f2.8; 1/1600; ISO200

Canon with 1x adapter @8mm; f2.8; f4.0; 1/1000; ISO200

#2.: here center crops of the images at wider aperture:

upper: Zuiko; Tokina. lower: Canon 0.71x; Canon 1x.

#3.: here corner crops of the images at wider aperture:

upper: Zuiko, Tokina. lower: Canon 0.71x, Canon 1x.

#4.: and here the images @8mm, but f 8.0:

Zuiko 8mm; f8; 1/160; ISO200

Tokina with 0.71x booster @8mm; f8;1/200; ISO200

Canon with 0.71x booster @8mm; f8; 1/200; ISO200

Canon with 1x adapter @8mm; f8; 1/250; ISO200

#5.: center crops at f8:

upper: Zuiko, Tokina; lower: Canon 0.71x, Canon 1x.

#6.: corner crops at f8:

upper: Zuiko, Tokina; lower: Canon 0.71x, Canon 1x

Conclusion:

1.: At open aperture, the Tokina is inferior with respect to sharpness and purple fringing. The Canon is much better and very close to the Zuiko. While Zuiko has best performance with respect to purple fringing (almost nothing), but the Canon may be a tick sharper with the glassless 1x adapter. The Canon with the 1x adapter performs a little better compared to the 0.71x booster.

2.: At f8 the differences become considerably smaller.

3.: I conclude that the Canon 8-15mm is as good as the native Zuiko.

Wolfgang

 Architeuthis's gear list:Architeuthis's gear list
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OP Architeuthis Regular Member • Posts: 251
Re: Comparison: Tokina 10-17mm & Canon 8-15mm fisheye with native Zuiko 8mm on EM5MIl
1

Part II: Comparison of the adapted fisheye lenses @15mm.

At a diagonal angle of view of 180o (@8mm) there is no need to use the heavy and expensive adapted lenses, since the Zuiko 8mm Pro performs perfect. The benefit of the adapted zoom fisheye lenses comes at longer focal lengths and I have compared IQ @15mm (using the 1x Metabones smart adapter with and without the 1.4x teleconverter). Of course the Zuiko 8mm prime lens cannot serve as reference in this case.

#1.: The original images @15mm with wide aperture:

Canon 1x Metabones; @15mm; f4.0; 1/1600; ISO200

Tokina 1x Metabones; @15mm; f 4.5; 1/3200; ISO200

Canon 1x Metabones + 1.4x Teleconverter; @15mm; f 5.7; 1/80; ISO200

Tokina 1x Metabones + 1.4x Teleconverter; @15mm; f 5.2; 1/2500; ISO200

#2.: Crops of center of the images above:

upper: Canon 1x, Tokina 1x; lower: Canon 1.4x, Tokina 1.4x

#3.: Crops from the corners at aperture open:

upper: Canon 1x, Tokina 1x; lower: Canon 1.4x, Tokina 1.4x

#3.: Original images @15mm, but at f 8.0:

Canon 1x Metabones; @15mm; f 8; 1/400; ISO200

Tokina 1x Metabones; @15mm; f 8; 1/1000; ISO200

Canon 1x Metabones+ 1.4x teleconverter; @15mm; f 8; 1/400; ISO200

Tokina 1x Metabones+ 1.4x teleconverter; @15mm; f 8; 1/1000; ISO200

#4.: Crops of the center of the images above (@15mm; f 8.0):

upper: Canon 1x, Tokina 1x; lower: Canon 1.4x, Tokina 1.4x

#5.: Crops of the corners of the images above (@15mm, f 8.0):

upper: Canon 1x, Tokina 1x; lower: Canon 1.4x, Tokina 1.4x

Fazit.:

#1.: @15mm the Canon performs clearly better than the Tokina (sharpness, purple fringing).

#2.: With 1x Metabones, the difference is hughe when aperture wide open, but the Tokina catches up to some extend at f 8.0.

#3.: When the 1.4x teleconverter is added, the Canon performs still o.k. @15mm, but the Tokina is useless (maybe as an art lens? ;-)).

I hope this information is useful for someone...

Wolfgang

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Olympus E-M1 II Olympus E-M5 II Canon EF 100mm F2.8L Macro IS USM Olympus M.Zuiko Digital ED 9-18mm F4.0-5.6 Panasonic Lumix G Vario 7-14mm F4 ASPH +7 more
DavidKennard
DavidKennard Regular Member • Posts: 207
Re: Comparison: Tokina 10-17mm & Canon 8-15mm fisheye with native Zuiko 8mm on EM5MIl

When I tried the Canon with a Kenko Teleplus HD 1.4x on my A7R2 I found the edges were very soft, while the center was pretty sharp. I wonder if your TC is much better than mine, or it's simple a case of the m4/3 crop removing much of the poor performance towards the edge. The corner performance looks very respectable in your images.

I also found the Canon much better performing towards the edges than the Tokina on FF.

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Panasonic Lumix DMC-FZ5 Canon EOS 5D Mark II Fujifilm X-M1 Fujifilm X-A1 Canon EF 100mm f/2.8 Macro USM +23 more
OP Architeuthis Regular Member • Posts: 251
Re: Comparison: Tokina 10-17mm & Canon 8-15mm fisheye with native Zuiko 8mm on EM5MIl

Hi David,

Almost for sure the difference in Corner sharpness is due to the 2x crop factor of the OM-D 5 MII: On MFT format, an area in the center of the image circle is used that is only 25% of the area that is used by the Sony . Seems that you used the same Kenko 1.4x teleconverter that I am using...

The crop factor is, to my opinion, the sweetie that makes the Canon 8-15mm so usefull for WA photos underwater (I intend to use the lens mostly under water): @8mm (1x adapter) the diagonal angle of view starts at 170o-180o (170 is the calculated value) and @15mm it is 85o (equivalent to a 12mm rectilinear WA lens (MFT; 24mm for FF). For comparison, when used with FF camera the Canon 8-15mm can be just used as circular fisheye @8mm and diagonal 180o fisheye @15mm - by far not so versatile compared to MFT cameras...

With the 1.4x teleconverter the range of angle of view is 115o-60o (equivalent to rectilinear WA focal length of 7mm-19mm (MFT; 14mm-38mm for FF).

Wolfgang

 Architeuthis's gear list:Architeuthis's gear list
Olympus E-M1 II Olympus E-M5 II Canon EF 100mm F2.8L Macro IS USM Olympus M.Zuiko Digital ED 9-18mm F4.0-5.6 Panasonic Lumix G Vario 7-14mm F4 ASPH +7 more
DavidKennard
DavidKennard Regular Member • Posts: 207
Re: Comparison: Tokina 10-17mm & Canon 8-15mm fisheye with native Zuiko 8mm on EM5MIl

I agree, the only benefit of the lens on FF is when shooting 360° panoramas that contain movement as it lets you capture a full 360 in fewer shots, and so less stitching errors caused by stuff moving betweens frames.

With APS-C I used to use the Tokina and get superwide rectilinear images by shooting around 14mm and then defish.

With regards to the TC, as far as I'm aware that model is the only one that does not have protruding lens elements, and so is suitable for use with non-tele lenses. The only other alternative is a native mount TC where the element protrudes up into the Canon adapter mounted on top. But the Sony TCs are very expensive, so I'm not going to try that.

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Panasonic Lumix DMC-FZ5 Canon EOS 5D Mark II Fujifilm X-M1 Fujifilm X-A1 Canon EF 100mm f/2.8 Macro USM +23 more
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