fredmiranda.com
Login

Moderated by: Fred Miranda
  New fredmiranda.com Mobile Site
  New Feature: SMS Notification alert
  New Feature: Buy & Sell Watchlist
  

FM Forums | Leica & Alternative Gear | Join Upload & Sell

1       2       3              5              7              30       31       end
  

Archive 2008 · Sigma 50mm: Marmite Bokeh

  
 
badlydrawnboy
Offline
• • •
Upload & Sell: Off
p.6 #1 · Sigma 50mm: Marmite Bokeh


That's pretty impressive for wide open performance.


Jul 06, 2008 at 04:03 PM
05xrunner
Offline
• • •
Upload & Sell: Off
p.6 #2 · Sigma 50mm: Marmite Bokeh


I am very pleased with this lens


Jul 06, 2008 at 04:04 PM
simon_k
Offline
• •
Upload & Sell: Off
p.6 #3 · Sigma 50mm: Marmite Bokeh


I really want one... why can't they send proper lenses to my local shop?


Jul 06, 2008 at 04:12 PM
brainiac
Offline
[X]
p.6 #4 · Sigma 50mm: Marmite Bokeh


> What remains as mysterious as the Mona Lisa's smile is the uncannily beautiful shapes drawn by the Minolta 58mm – a lens that 'technically' doesn't have textbook perfect bokeh, if we assume the benchmark to be 'buttery-ness'. And yet . . .

yes - the rokkor's bokeh is beautifully quirky:
http://cyberphotographer.com/c/20080628costa/605.jpg
http://cyberphotographer.com/1ds3/rokkor/claudia_crop.jpg

In a couple of places where the highlights are close enough to each other, you can see beautiful venn diagram style overlapping of 'perfect' bokeh, i.e. neither soft nor harsh, with edges retained in superposition. You see Olympus style cup shaped bokeh towards the top right corner, but towards the center you can make out the somewhat rounded f2 aperture blades. Not soft and creamy, not harsh, but full of balance, serendipity, and nice well defined edges. That's one of the reasons I am keeping my Rokkor.

In my view 'perfect' bokeh, that with well defined edges but neither soft nor harsh, often seems to go hand in hand with strong 3D effect.

Edited on Jul 06, 2008 at 06:48 PM



Jul 06, 2008 at 06:45 PM
brainiac
Offline
[X]
p.6 #5 · Sigma 50mm: Marmite Bokeh


CKrueger wrote:
Wow, that's exactly what I was going to say. From what you hear here, I would expect if you shot a Canon 50/1.4 next to a Sigma 50/1.4 at f/11, the Sigma's background would like Monet threw up on the background, while the Canon would be razor sharp. Clearly this Sigma has some sort of dark magical power!

Some people here have spent the last few years (and untold thousands of dollars) buying and testing all varieties of exotic lenses to find The Perfect Bokeh. When they find a particularly good lens, they post images with some noisy background thrown out
...Show more

Yeah! You're all over it.



Jul 06, 2008 at 06:53 PM
Spyro P.
Offline
• • • •
Upload & Sell: Off
p.6 #6 · Sigma 50mm: Marmite Bokeh


I think this f2.8 shot by 05xrunner showed something different that I really like


Jul 06, 2008 at 07:05 PM
trumpet_guy
Offline
• • • •
Upload & Sell: Off
p.6 #7 · Sigma 50mm: Marmite Bokeh


cogitech wrote:
05xrunner,

Sweet! Especially that first shot. Wide open?

BTW, any users of this lens care to comment on the manual focus action on this lens?


The manual focus action feels the same as on the 30/1.4
which is to say, firm and fairly high gear ratio. Nothing as silky
and precise as a CZ 50/1.4 Planar, but firmer and less
cheap feeling than the Canon EF 50/1.4

The manual focus on Canon L class EF lenses feels a little nicer, but as
autofocus lenses go, the Sigma is not too bad. If you are expecting
something as smooth as a CZ prime, though, you will be disappointed.

Tim


Edited on Jul 06, 2008 at 11:54 PM



Jul 06, 2008 at 11:52 PM
Glassbottle
Offline
• • •
Upload & Sell: Off
p.6 #8 · Sigma 50mm: Marmite Bokeh


How's the Sigma doing for colour fringing around highlights when used wide open? The fast Canon primes all seem to suffer from it.

Edited on Jul 07, 2008 at 02:15 AM



Jul 07, 2008 at 02:14 AM
trumpet_guy
Offline
• • • •
Upload & Sell: Off
p.6 #9 · Sigma 50mm: Marmite Bokeh


Glassbottle wrote:
How's the Sigma doing for colour fringing wide open? The fast Canon primes all seem to suffer from it.



It seems fine to me, but you can look at a full-size f/1.4 image here:
http://www.pbase.com/tswen/50compare/




Jul 07, 2008 at 02:18 AM
Glassbottle
Offline
• • •
Upload & Sell: Off
p.6 #10 · Sigma 50mm: Marmite Bokeh


trumpet_guy wrote:
It seems fine to me, but you can look at a full-size f/1.4 image here:
http://www.pbase.com/tswen/50compare/


Thanks, nice set of comparisons. But I should have specified I was interested in fringing around specular highlights -- that's where the 50/1.2L and the 85/1.8, at least, are at their worst. Sunlight on water at f/1.4 would be the ideal torture test.

Here's the 50/1.2L demonstrated at photozone.de
http://www.photozone.de/images/8Reviews/lenses/canon_50_12/fringe.jpg


Edited on Jul 07, 2008 at 02:35 AM



Jul 07, 2008 at 02:31 AM
trumpet_guy
Offline
• • • •
Upload & Sell: Off
p.6 #11 · Sigma 50mm: Marmite Bokeh


Understood. I don't have a shot like that handy.

This one with the out of focus light source shows no color fringing, wide open.

http://www.pbase.com/tswen/image/99800012/original.jpg



Jul 07, 2008 at 02:58 AM
Stu Warner
Offline
• •
Upload & Sell: Off
p.6 #12 · Sigma 50mm: Marmite Bokeh


The new Sigma does look like a really, really nice lens.
I think that I personally would have no complaints what so ever optically. Wide open resolution, contrast, and bokeh look faultless to my eyes. No question that it is a good choice for a 50mm IMHO.

My only remaining concerns are size/weight and reliable AF. Basically, if the AF is not particularly reliable, then I see no value in the Sigma 1.4 over my Zu 50/1.2 (Jonas B's old copy), other than perhaps better handling of CA/fringing. The Olmpus is also much lower contrast.

I really do like the look of this Sigma.

Keep the samples coming guys... I never tire of fast 50 shots



Jul 07, 2008 at 03:33 AM
FretNoMore
Offline
• • • •
Upload & Sell: Off
p.6 #13 · Sigma 50mm: Marmite Bokeh


Agree it looks very nice optically but I'm more concerned about AF too. My intended use would be indoor sports and if the AF isn't better than the EF 50/1.4 it may not be an improvement over that lens.


Jul 07, 2008 at 04:16 AM
brainiac
Offline
[X]
p.6 #14 · Sigma 50mm: Marmite Bokeh


CKrueger wrote:
Wow, that's exactly what I was going to say. From what you hear here, I would expect if you shot a Canon 50/1.4 next to a Sigma 50/1.4 at f/11, the Sigma's background would like Monet threw up on the background, while the Canon would be razor sharp. Clearly this Sigma has some sort of dark magical power!

Some people here have spent the last few years (and untold thousands of dollars) buying and testing all varieties of exotic lenses to find The Perfect Bokeh. When they find a particularly good lens, they post images with some noisy background thrown out
...Show more

Sorry - can't resist feeding the dpreview trolls.

In my job of photographer I use Canon, Nikon, Olympus, Zeiss, Leica, and Minolta lenses. I would have no problems using a Sigma. Sigma make many excellent lenses. Most of the regulars on this forum are pretty much brand agnostic, and happy to assess any lens from any manufacturer. Luckily it's easy to do that these days. On the alt image thread you will see Soligors, Vivitars, Pentacons and just about every kind of lens being shown, with just about no trolling. However, most alt forum contributors are not quality agnostic; they prioritise certain lens qualities and features over others. Often this reflects the kind of pictures that they enjoy taking, whether that be landscape or macro or astro. Good lenses are good lenses, and bad ones are bad, and snobbery and brand loyalty have nothing to do with it.

Some people like smooth bokeh, some prefer 'perfect' bokeh, and some people even like it a bit harsh. Some people like catadioptric bokeh. Everyone's entitled to her own tastes, and she's entitled to discuss it here, regardless of those who come here to troll and insult.

Often the reason alt lenses are popular here isn't snobbery, but the reverse. Take the Rokkor 58 for example. It's very nearly as good as a Canon 50L but costs about one fifth as much. The Oly 28 f3.5 is another example of a lens which is popularly discussed here because although it only costs $40, it performs nearly as well as the very best lenses in that range. That's not snobbery, it's frugality.

Sigma lenses are often discussed here, and often highly praised. I have seen the 12-24 recommended hundreds of times.

> Perhaps predictably, the nobility staggers for a moment, but quickly regains its composure and comes up with a plan of attack: "The bokeh is too smooth!"

And yes, I don't like bokeh to be too smooth. This is nothing new. You will find posts by me going back about as far as when I became a member here, which discuss my preference for edges in bokeh. It's one reason why I am not generally a big fan of Leica lenses. Other people like it smooth, and why shouldn't they? The third sample in the group below is too smooth by my reckoning. You can disagree, as many will, but there's no need to call anyone here a snob.
http://cyberphotographer.com/fm/bokeh_f1_4_lowrez.jpg

What it boils down to is: you're barking up the wrong tree - go and pick a fight somewhere else.



Edited on Jul 07, 2008 at 04:50 AM



Jul 07, 2008 at 04:27 AM
Glassbottle
Offline
• • •
Upload & Sell: Off
p.6 #15 · Sigma 50mm: Marmite Bokeh


trumpet_guy wrote:
This one has a specular reflection, but was taken at f/2.8


Thank you for those additional samples. It's pretty clear now that this lens is remarkably free of optical vices. I'm impressed. Sigma hasn't impressed me like this before, great feat of engineering though the 12-24 mentioned earlier by Brainiac may be.

Personally, I love this 50's smooth bokeh, perfect for isolating subjects and leaving only a suggestion of their environment, which is something I need to do quite often.

I think I'll get one.



Jul 07, 2008 at 04:56 AM
brainiac
Offline
[X]
p.6 #16 · Sigma 50mm: Marmite Bokeh


And btw, while many prefer a softer look, I am not alone in my preference for bokeh with edges, as this diagram from a page about bokeh illustrates:
http://bokehtests.com/Site/About_Bokeh_files/Multiple%20spots%20background%20vs%20foreground%20flat%20trans.jpg

Here's a real world example, and possibly an area where the edges in the bokeh seem to sharpen up the hair that it silhouettes extending d.o.f. and creating more 3D effect. Only a conjecture, but a characteristic often seen with particular lenses.

http://cyberphotographer.com/5D/CZ351.4/85_3D_labelled.jpg

Edited on Jul 07, 2008 at 05:38 AM



Jul 07, 2008 at 05:10 AM
biotar
Offline
• •
Upload & Sell: Off
p.6 #17 · Sigma 50mm: Marmite Bokeh


@ brainiac

I agree with you that bokeh is very subjective, as can also be read in the article you cite. In neutral terms the bokeh of the sigma is of course 'good' and can satisfy many customers for professional use, but that does not mean that you're a snob if you personally don't like it.

I do however have a question apart from this, as i have read some thoughts of yours on the relation between bokeh and 3d effect.
Recently I bought a jupiter 37a that delivers quite similar bokeh to this sigma. The jupiter gives a great 3D effect however even with smooth bokeh. This leads me to believe the following: if bokeh looks similar to what your own eyes produce, does that perhaps render a 3D effect?

sorry for posting this here but the other topic is lost in language

Edited on Jul 07, 2008 at 05:45 AM



Jul 07, 2008 at 05:39 AM
brainiac
Offline
[X]
p.6 #18 · Sigma 50mm: Marmite Bokeh


biotar wrote:
Recently I bought a jupiter 37a that delivers quite similar bokeh to this sigma. The jupiter gives a great 3D effect however even with smooth bokeh.


In that case my conjecture that the two things are connected is wrong. I would be very interested to see examples. Maybe you would be so kind as to post them on Jonas's excellent 'admirable blur samples' thread rather than here.

> This leads me to believe the following: if bokeh looks similar to what your own eyes produce, does that perhaps render a 3D effect?

That's a thought which occurred to me and I mentioned on the 3D effect thread of about a year ago. Certainly, if you hold a pencil at an angle to the edge of a window and focus on the pencil's edge you can examine in your mind's eye the bokeh of your own lenses. In the case of my eyes I don't see soft bokeh, but something slightly more jarring like the 'perfect' lens bokeh shown above, which could explain my personal taste in this issue.

Edited by brainiac on Jul 07, 2008 at 11:08 AM GMT

Edited on Jul 07, 2008 at 06:08 AM



Jul 07, 2008 at 06:01 AM
FretNoMore
Offline
• • • •
Upload & Sell: Off
p.6 #19 · Sigma 50mm: Marmite Bokeh


To me "3D" or "pop" is a lot about the combination of short DOF and micro-crontrast, and not so much about the quality of the bokeh. Granted it's maybe helped by having some detail in the OOF background to give hints of objects there but I think it's more important to have a distinct main subject (i.e. constrasty) set against an OOF background.


Jul 07, 2008 at 06:06 AM
brainiac
Offline
[X]
p.6 #20 · Sigma 50mm: Marmite Bokeh


FretNoMore wrote:
To me "3D" or "pop" is a lot about the combination of short DOF and micro-crontrast, and not so much about the quality of the bokeh. Granted it's maybe helped by having some detail in the OOF background to give hints of objects there but I think it's more important to have a distinct main subject (i.e. constrasty) set against an OOF background.


There was a long and often interesting 3D thread about a year ago, in which examples were given of images with strong 3D effect but no out of focus areas at all. It seemed to me that it was pretty clearly demonstrated that 3D effect was to do with the way a lens draws objects in relation to their surroundings. Some lenses seem to pick out objects from their surroundings even when the surroundings are completely sharp. Someone mentioned that Zeiss worked on 'edge sharpness' in the 70's, and even today some Zeiss lenses illustrate edges which cut things out from their surroundings in an almost surreal way. Here are some examples - I hope the photographers don't mind me linking their images from old threads.

3D effect but all in focus:
http://i98.photobucket.com/albums/l264/foxbat_gb/Nature/bluebell-28.jpg

No 3D effect, against all odds:
http://www.atris.it/files/leica/lavender.jpg

Examples of strong edge contrast:
Zeiss:
http://cyberphotographer.com/5D/lotus/allium_arrows.jpg

Canon:
http://cyberphotographer.com/5D/nicklucia/cropcollar.jpg

One thing I noticed, doing the pencil test, is that my own eyes show this heightened edge contrast. I wonder if it is to do with diffraction at object edges.



Jul 07, 2008 at 07:06 AM
1       2       3              5              7              30       31       end




FM Forums | Leica & Alternative Gear | Join Upload & Sell

1       2       3              5              7              30       31       end
    
 

Welcome back
Log in to your account