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Archive 2010 · UPDATED -- Showdown: Rokinon vs Canon 85's

  
 
cogitech
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p.4 #1 · UPDATED -- Showdown: Rokinon vs Canon 85's


I believe the outdoor f2 shots have equal exposures. If you will, please point out what highlights are muted in the Rokinon shot as compared to the 85L shot, or explain the tonal differences. I can't for the life of me find any differences. One is as 'alive' as the other, to my eyes.

http://www.scvimagery.com/home/wp-content/uploads/tests/two.jpg



Jun 21, 2010 at 04:11 PM
TAGfan
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p.4 #2 · UPDATED -- Showdown: Rokinon vs Canon 85's


Not really --

If you look at the red tires on the car, they are more vibrant in the canon shot. In addition, the tree in the left background is more contrasty in the canon shot compared to the Rok - look at the dark portion at the bottom.



Jun 21, 2010 at 05:31 PM
cogitech
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p.4 #3 · UPDATED -- Showdown: Rokinon vs Canon 85's


TAGfan wrote:
Not really --

If you look at the red tires on the car, they are more vibrant in the canon shot. In addition, the tree in the left background is more contrasty in the canon shot compared to the Rok - look at the dark portion at the bottom.


But how many angels can dance on the head of a pin?

(IMO, the red in the Rokinon shot is preferable.)



Jun 21, 2010 at 05:34 PM
theSuede
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p.4 #4 · UPDATED -- Showdown: Rokinon vs Canon 85's


Huh?
In these kinds of arguments it is often good to step back and take a look at the facts - or in this case the NUMBERS in the image. There is indeed an exposure difference (1/12Ev) and a slight WB difference (Canon favours RED). Otherwise saturation points and zeros are placed EXACTLY the same in both variations of the image.

These are the separated R-G-B channels, with gamut problems indicated as very bright or very dark spots. Gray is everything between 10-245 out of the available 0-255 range

http://pici.se/pictures/oOlqbnydo.gif

Some ranges are way oversaturated, to the point of hard channel-clipping (channels pinned at "0" or "255") - which makes ANY attempt at "trying to visually compare results" totally and utterly futile...

If we keep to what CAN be seen in the (quite smallish) picture, the Rokinon/Samyang has higher global contrast than the Canon (which surprises me). The luminance delta between the white(ish) wall in the background and the chair to the left is higher in the Rokinon. This MIGHT also be a minute change in sunlight intensity or a small cloud refelcting light from a slightly different place in the two pictures, but... (?)

In this size example, I bet almost no-one can actually repeatedly get more than 5/10 right when guessing at ten pairs of unmarked pictures. The only way to separate them as I see it is if there's any high contrast sharp lines in the BG - then the Canon will have more bokeh CA.



Jun 21, 2010 at 06:02 PM
Jason_Thames
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p.4 #5 · UPDATED -- Showdown: Rokinon vs Canon 85's


One again, for the love of God, they are both great! I love my 85LII and since I already have it I won't be buying a Rok. If I did not need AF for weddings, events, etc. then I believe I could get equally good results with the Rok and my Ee-S. Believe it or not, when you have 2 lenses that perform so well, the real difference is the person behind the eyepiece. Now, lets go make some photos...

-Jason



Jun 21, 2010 at 06:34 PM
Yakim Peled
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p.4 #6 · UPDATED -- Showdown: Rokinon vs Canon 85's


JonasY wrote:
My conclusion: Nailing focus is far more important than the difference between the two lenses ...


Great minds think alike.

Happy shooting,
Yakim.



Jun 22, 2010 at 01:47 AM
pdmphoto
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p.4 #7 · UPDATED -- Showdown: Rokinon vs Canon 85's


Good thing the test for the Canon wasn't done at F/1.2 (or even f/1.4). The blue (or even better purple channel) would show a good insight to the weakness of the Canon 85/1.2.


Jun 22, 2010 at 04:23 AM
cogitech
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p.4 #8 · UPDATED -- Showdown: Rokinon vs Canon 85's


JonasY wrote:
My conclusion: Nailing focus is far more important than the difference between the two lenses ...


Which, depending on one's skills, is easier to achieve with a real focusing ring than focus-by-wire.




Jun 22, 2010 at 08:50 AM
Yakim Peled
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p.4 #9 · UPDATED -- Showdown: Rokinon vs Canon 85's


cogitech wrote:
Which, depending on one's skills, is easier to achieve with a real focusing ring than focus-by-wire.


I had an Oly 50/1.8 and have two Mamiya M645 lenses: 35/3.5 and 120/4. All are pure MF lenses. I much prefer to MF with my ring USM lenses (either FTM or MF) than with these lenses. Better tactile response IMHO.

Happy shooting,
Yakim.



Jun 22, 2010 at 08:59 AM
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