Home · Register · Join Upload & Sell

Moderated by: Fred Miranda
Username  

  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              30       31       end
  

Archive 2008 · Sigma 50mm: Marmite Bokeh

  
 
httivals
Offline
• • •
Upload & Sell: Off
p.2 #1 · p.2 #1 · Sigma 50mm: Marmite Bokeh


Mark: How accurate is the focusing of the Sigma 50mm f1.4 (or your Sigma 50mm f1.4) on a Canon 5D? Thanks, Howard


Jul 01, 2008 at 12:39 PM
hubsand
Offline
• • • •
Upload & Sell: Off
p.2 #2 · p.2 #2 · Sigma 50mm: Marmite Bokeh


The first time I trialled the Sigma 50's AF on the 1Ds III it was laughable, but I've not had enough time with it to comment on that.


Jul 01, 2008 at 12:50 PM
cogitech
Offline
• • • • • •
Upload & Sell: On
p.2 #3 · p.2 #3 · Sigma 50mm: Marmite Bokeh


I prefer the Sigma bokeh. It is all so subjective, I suppose.


Jul 01, 2008 at 01:03 PM
trumpet_guy
Offline
• • • •
Upload & Sell: Off
p.2 #4 · p.2 #4 · Sigma 50mm: Marmite Bokeh


httivals wrote:
Mark: How accurate is the focusing of the Sigma 50mm f1.4 (or your Sigma 50mm f1.4) on a Canon 5D? Thanks, Howard


At dpreview.com, user Chez Wimpy posted extensively about this lens
and mentioned that autofocus worked fine with this lens on his 20D.
A number of the shots he posted from AI Servo mode looked good.

Check here:
http://forums.dpreview.com/forums/read.asp?forum=1029&message=28290959
and here:
http://forums.dpreview.com/forums/read.asp?forum=1029&message=28301575

My copy should arrive today. We'll see how it works on a 30D.

Tim


Edited by trumpet_guy on Jul 01, 2008 at 01:01 PM GMT

Edited on Jul 01, 2008 at 03:01 PM



Jul 01, 2008 at 01:34 PM
Andi Dietrich
Offline
[X]
p.2 #5 · p.2 #5 · Sigma 50mm: Marmite Bokeh


Does the EXIF allow lens corrections in DPP? This may be a possibility if Sigma adapter the same settings of the EF50mm


Jul 01, 2008 at 01:50 PM
Andi Dietrich
Offline
[X]
p.2 #6 · p.2 #6 · Sigma 50mm: Marmite Bokeh


Thanks Mark to share your insight on this lens, sorry I once more have to leave a critical comment about it

These are not bokeh samples, these are OOF blur disc samples, it doesnt tell a lot about the quality of the bokeh, maybe it tells something about the character of the bokeh though. Curvature of field may just be too different to any other lenses to compare them the way you have done it.

I believe that the reason some lenses do not fully correct CA wide open, is that you have shaped OOF discs and not the IMO boring blobs of the Sigma. Again some people may like it others dont and it is certainly a lens with some appeal to people who want to replace the Canon 1.4



Jul 01, 2008 at 01:53 PM
martinsmith
Offline

Upload & Sell: Off
p.2 #7 · p.2 #7 · Sigma 50mm: Marmite Bokeh


What's wrong with the bokeh of the Siggy?


Jul 01, 2008 at 01:54 PM
timbop
Offline
• • • • •
Upload & Sell: Off
p.2 #8 · p.2 #8 · Sigma 50mm: Marmite Bokeh


cogitech wrote:
I prefer the Sigma bokeh. It is all so subjective, I suppose.


agreed. I suppose it depends on what "look" you are going for, but I like buttery backgrounds



Jul 01, 2008 at 02:57 PM
CKrueger
Offline
• • • •
Upload & Sell: Off
p.2 #9 · p.2 #9 · Sigma 50mm: Marmite Bokeh


It's amusing that for years around here we've heard people complain about the busy bokeh of Canon lenses and rave about the smooth bokeh of other makes of lenses. Now that Sigma seems to have put out a lens with smooth bokeh, some complain that its bokeh is not busy enough.

Perhaps Sigma needs to launch a luxury brand, ala Lexus.



Jul 01, 2008 at 03:44 PM
Andi Dietrich
Offline
[X]
p.2 #10 · p.2 #10 · Sigma 50mm: Marmite Bokeh


CKrueger wrote:
It's amusing that for years around here we've heard people complain about the busy bokeh of Canon lenses and rave about the smooth bokeh of other makes of lenses. Now that Sigma seems to have put out a lens with smooth bokeh, some complain that its bokeh is not busy enough.

Perhaps Sigma needs to launch a luxury brand, ala Lexus.


You missed the point.
we have no idea how the full image looks like, where the focus sits, how much the blobs are out of focus, the distance to the background, the scale of the image





Jul 01, 2008 at 03:58 PM
JohnJ
Offline
• • • •
Upload & Sell: Off
p.2 #11 · p.2 #11 · Sigma 50mm: Marmite Bokeh


I think the sigmas's bokeh looks best.
JJ



Jul 01, 2008 at 05:03 PM
hubsand
Offline
• • • •
Upload & Sell: Off
p.2 #12 · p.2 #12 · Sigma 50mm: Marmite Bokeh


Andi Dietrich wrote:
You missed the point.
we have no idea how the full image looks like, where the focus sits, how much the blobs are out of focus, the distance to the background, the scale of the image.

The point is that all four lenses were placed under identical conditions; the comparative difference is the point.

I'm not sure that posting the full frame will tell you anything more meaningful than the crops, but here it is anyway: the Sigma at f4. Distance to focal plane (subject centre frame) was about 1m. Distance to bokeh samples ranged from about 15cm to 1.5m. As stated previously, all these are background rather than foreground samples.
http://www.16-9.net/raw/bokeh_ff_f4.jpg
I will be looking at the bokeh in other settings but I'm not interested in shooting an unrealistically contrived set: for me, bokeh only becomes an issue when it's either too busy, draws ugly light discs, or has prominent CA – so I'll be seeking out scenes that tell me something I want to know.

If anyone wants to see samples of different areas at different scales or apertures, just shout.

Edited on Jul 01, 2008 at 05:27 PM



Jul 01, 2008 at 05:21 PM
FranchiseJuan
Offline
• • •
Upload & Sell: Off
p.2 #13 · p.2 #13 · Sigma 50mm: Marmite Bokeh


From what i can see, I am linking this Sigma very much. I am probably going to get one to have a play with, as i have no AF 50 at the moment.

Mark: Have you got a sample as above but at F1.4? Just want to see what it is like.



Jul 01, 2008 at 06:26 PM
hubsand
Offline
• • • •
Upload & Sell: Off
p.2 #14 · p.2 #14 · Sigma 50mm: Marmite Bokeh


FranchiseJuan wrote:
Mark: Have you got a sample as above but at F1.4? Just want to see what it is like.

http://www.16-9.net/raw/bokeh_ff_f14.jpg



Jul 01, 2008 at 06:47 PM
mh2000
Offline
• • • • •
Upload & Sell: Off
p.2 #15 · p.2 #15 · Sigma 50mm: Marmite Bokeh


looking very very promising to me! thanks!


Jul 01, 2008 at 07:05 PM
trumpet_guy
Offline
• • • •
Upload & Sell: Off
p.2 #16 · p.2 #16 · Sigma 50mm: Marmite Bokeh


Andi Dietrich wrote:
Does the EXIF allow lens corrections in DPP? This may be a possibility if Sigma adapter the same settings of the EF50mm



I just got my Sigma 50 tonight. Yes, it allows lens corrections in DPP.
I'm not sure how relevant this is, since the geometric distortion is very
well controlled on this lens, and I haven't seen much CA with it.
I also noticed that Peripheral Illumination correction vastly over-corrected
the vignetting, if I used the standard amount (100).

Tim



Jul 02, 2008 at 01:37 AM
Ariel Bravy
Offline
• • • • •
Upload & Sell: Off
p.2 #17 · p.2 #17 · Sigma 50mm: Marmite Bokeh


That Sigma's bokeh looks gorgeous! Any comparisons with the Canon 50's?


Jul 02, 2008 at 04:19 AM
Jonas B
Offline
• • • •
Upload & Sell: Off
p.2 #18 · p.2 #18 · Sigma 50mm: Marmite Bokeh


trumpet_guy wrote:
I'm posting some shots taken with the Sigma 50/1.4 on a 30D.(...)


Thank you for the images. The lens look very promising. What's your first impression with regards to AF? Silent, slow, missing or fast and nailing?



Jul 02, 2008 at 04:27 AM
trumpet_guy
Offline
• • • •
Upload & Sell: Off
p.2 #19 · p.2 #19 · Sigma 50mm: Marmite Bokeh


Fast, quiet, generally accurate. I'm getting about the same AF accuracy with
the Siggy on my 30D that I get with Canon lenses on this body: which is to say
good, but not perfect. When it misses, it generally front-focuses a little, but I
think this is as much the body's fault as anything. This lens seems about as
accurate in AF as my EF 100 f/2.

The build quality is very nice on this Sigma. When focusing from minimum
distance out to long distance, it is smooth and pretty fast, with a really nice
quality feel to the focus motor. There is fairly heavy glass to move, and the
HSM is up to the task. When focusing over a smaller range, around 8 to 10 meters
out, you can sometimes feel a little clunk in the mechanism, as it is moving and
stopping very quickly.

Overall, the lens feels very much like a slightly larger Sigma 30/1.4

I think they have optimized this lens for bokeh and uniformity across the full frame.
Distortion is minimal. Straight lines look straight. No visible vignetting on 1.6x crop
body -- even wide open. Colors are fantastic.

It is still possible to get low contrast with the lens, when shot in dim, soft light,
but I think it's still better wide open than the EF 50/1.4 or the CZ 50/1.4 Planar.

Tim


Edited by trumpet_guy on Jul 02, 2008 at 02:46 AM GMT

Edited on Jul 02, 2008 at 04:46 AM



Jul 02, 2008 at 04:39 AM
brainiac
Offline
[X]
p.2 #20 · p.2 #20 · Sigma 50mm: Marmite Bokeh


> I think the sigmas's bokeh looks best.

The bokeh question is a matter of taste, and I am well aware that few share my bad taste. I like my bokeh to look more interesting than this lens makes it. Whether smooth, Leica-style bokeh kills 3D effect or not, I don't know, but I don't think it's impossible that there is a connection between sharp edged image circles, extended depth of field, 3D effect, and edge sharpness.

In hubsands sample of the tassle thingy hanging off the table, all the lenses draw a beautiful mysterious object which clearly has a pattern of strong points of light in it. On the Sigma it's just mush, so the lens is telling me less about the scene.

I would be interested to see if this lens can produce the kind of interesting edge effects that Lotus gets on his ZF100 f2:
http://cyberphotographer.com/5D/lotus/allium_arrows.jpg

One of the reasons I am not always very enthusiastic about Leica glass is that in seeking creamy bokeh, 3D effect often seems to be lost. I accept that this is purely conjectural, so I probably won't stand by it if someone can challenge it or has counterexamples.

Ultimately I don't think busy has to mean ugly. Sharp-edged bokeh can still be smooth, even if it is also well-defined.

As always, thanks Mark for sharing your data so generously.


Edited on Jul 02, 2008 at 05:01 AM



Jul 02, 2008 at 04:58 AM
1      
2
       3              30       31       end




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

1      
2
       3              30       31       end
    
 

You are not logged in. Login or Register

Username       Or Reset password



This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.