Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Read More.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses
Thread started 24 Sep 2005 (Saturday) 11:03
Prev/next
sponsored links
(this ad will go away when you log in as registered member)

Sigma 30mm f1.4 vs. Canon 28mm f2.8

 
Henrik ­ Ploug
Member
49 posts
Joined Sep 2005
Sep 24, 2005 11:03 |  #1

Here are some test shots from the Sigma 30mm f1,4 and the Canon 28mm f2,8. None of the shots have been sharpened in camera or in Photoshop.


The Sigma is sharper in the center and the Canon is sharper in the corner, when compared at equal apartures.
The center sharpness of the Sigma at f1,4 can be compared with the center sharpness of the Canon at f4. The corner sharpness of the Canon at f4 can be compared to the Sigma at 5,6.

IMG NOTICE: [NOT AN IMAGE URL, NOT RENDERED INLINE]



LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as registered member)
Henrik ­ Ploug
THREAD ­ STARTER
Member
49 posts
Joined Sep 2005
Sep 24, 2005 12:57 |  #2

Sigma 30mm f1,4 vs. Canon f2,8

Here are some test shots from the Sigma 30mm f1,4 and the Canon 28mm f2,8. None of the shots have been sharpened in camera or in Photoshop.


The Sigma is sharper in the center and the Canon is sharper in the corner, when compared at equal apartures.

The center sharpness of the Sigma at f1,4 can be compared with the center sharpness of the Canon at f4. The corner sharpness of the Canon at f4 can be compared to the Sigma at 5,6.

IMG NOTICE: [NOT AN IMAGE URL, NOT RENDERED INLINE]



LOG IN TO REPLY
Lenny_D
Member
63 posts
Joined Jun 2003
Netherlands
Sep 24, 2005 15:27 as a reply to Henrik Ploug's post |  #3

Really interesting.... What do you think, is the large change in sharpness across the diameter of the Sigma lens disturbing in real life photography? Is the 1.5 stop worth the unbalance in sharpness?
Obviously the Canon gives a more balanced picture (regarding sharpness).
Any other differences, e.g. contrast, clarity?
I'm still looking for the best "standard"' prime on a 20D.

Lenny




LOG IN TO REPLY
Henrik ­ Ploug
THREAD ­ STARTER
Member
49 posts
Joined Sep 2005
Sep 24, 2005 15:53 as a reply to Henrik Ploug's post |  #4

I have just done the test today, and I haven't noticed the soft edges before now. After I noticed, I have now expanded the test, so that it also includes edge crops:

IMG NOTICE: [NOT AN IMAGE URL, NOT RENDERED INLINE]



LOG IN TO REPLY
Henrik ­ Ploug
THREAD ­ STARTER
Member
49 posts
Joined Sep 2005
Sep 24, 2005 15:57 as a reply to Henrik Ploug's post |  #5

At the edge both lenses seem quite sharp, and I think I will keep the Sigma and sell the Canon. Just have to avoid getting the motif stuck in the corner.




LOG IN TO REPLY
Hellashot
Goldmember
4,617 posts
Joined Sep 2004
USA
Sep 24, 2005 19:09 |  #6
banned

The Sigma 30mm f1.4 DC is known to be a very sharp lens at f1.4, a lot sharper than Canon's f1.4 50mm.


5D, Drebel, EOS-3, K1000
lenses from 12mm-500mm

LOG IN TO REPLY
grego
Cream of the Crop
grego's Avatar
8,819 posts
Joined May 2005
UCLA
Sep 24, 2005 19:41 |  #7

That's the 28 f/2.8, not 50.


Go UCLAexternal link!! |Gear|http://gregburmann.comexternal linkSportsShooterexternal link|Flickrexternal link|

LOG IN TO REPLY
Hellashot
Goldmember
4,617 posts
Joined Sep 2004
USA
Sep 24, 2005 19:49 as a reply to grego's post |  #8
banned

grego wrote:
That's the 28 f/2.8, not 50.

Yes, what I stated is what I wanted to say. :)


5D, Drebel, EOS-3, K1000
lenses from 12mm-500mm

LOG IN TO REPLY
grego
Cream of the Crop
grego's Avatar
8,819 posts
Joined May 2005
UCLA
Sep 24, 2005 20:36 as a reply to Hellashot's post |  #9

Hellashot wrote:
Yes, what I stated is what I wanted to say. :)

I gotcha. I do have to say the 50 1.4 is one of the sharpest lens out there. And it not being an L, makes it even better of a deal. Although I haven't seen a side by side comparision of the 50 vrs 30 1.4's.


Go UCLAexternal link!! |Gear|http://gregburmann.comexternal linkSportsShooterexternal link|Flickrexternal link|

LOG IN TO REPLY
Henrik ­ Ploug
THREAD ­ STARTER
Member
49 posts
Joined Sep 2005
Sep 25, 2005 04:17 |  #10

Just added some extra shots from the edges and the top left corner. My conclusion:

The Sigma 30mm f1,4 is sharpest in the center.
The Canon 28mm f2,8 is sharpest in the corner.
The two lenses are just about equal at the edges.

426
x
1304
TOO LARGE!
EMBED PREVENTED, IMAGE TOO LARGE:
http://www.photo.net ...bboard_upload_id=25​797084
Click here to see our image rules.



LOG IN TO REPLY
pfogle
Senior Member
pfogle's Avatar
581 posts
Joined Dec 2004
Auckland NZ
Sep 25, 2005 07:14 |  #11

Nice example - the Sigma looks good compared to the 28/2.8 - though to be honest, I'm selling the EF28/2.8 because it's just not a great lens.

Has anyone compared the Sigma to the EF 28/1.8 - also not known as a great lens, but much more interesting to me than the f2.8 version.

thanks
Phil


_______________
Phil Fogle
5Dmk2; Zenitar 16mm, 17-40 f4L, 50 f1.4, Samyang 85 f1.4, 70-200 f4L

LOG IN TO REPLY
drisley
"What a Tool I am"
drisley's Avatar
8,812 posts
Joined Nov 2002
Sep 25, 2005 07:26 |  #12

If you get a good copy of the 28/1.8, it's an amazing lens.
The build and autofocus (speed and silence) are both fantastic.
I had a great copy that I sold to RichardTheSane, and he will vouch for it's optical quality.


http://photography-on-the.net/forum/showthre​ad.php?t=680947

LOG IN TO REPLY
Andy_T
Compensating for his small ... sensor
9,860 posts
Joined Jan 2003
Kuala Lumpur, Malaysia
Sep 25, 2005 07:56 as a reply to Henrik Ploug's post |  #13

That might have something to do with the Sigma being a DG lens (for reduced image circle) versus the Canon being a lens for full frame ... so you don't really see the edges of the Canon lens on an image from a 1.6 crop camera.

f/1.4 vs. f/4.0 is a difference of 3 full stops, btw. (that means 8 times the light gets in at the same time)
Full stops are 1.0 - 1.4 - 2.0 - 2.8 - 4.0 - 5.6 - 8.0 ...
Maybe not so important for landscapes, where you'd stop down anyway, but quite important if you want to isolate your subject.

Best regards,
Andy


some cameras, some lenses,
and still a lot of things to learn...
(so post processing examples on my images are welcome :D)
If you like the forum, vote for it where it really counts!
CLICK here for the EOS FAQ
CLICK here for the Post Processing FAQ
CLICK here to understand a bit more about BOKEH

LOG IN TO REPLY
pfogle
Senior Member
pfogle's Avatar
581 posts
Joined Dec 2004
Auckland NZ
Sep 25, 2005 08:03 |  #14

thanks, dr - by the way, do you know what the odds are on a 'good copy'? I'd put Sigma's at about 1 in 4 being good for the wides, but Canon I have no idea about. I haven't had a 'bad' Canon yet, but you do hear about them, especially with the 28/1.8 and the 20/2.8 for some reason.

Phil


_______________
Phil Fogle
5Dmk2; Zenitar 16mm, 17-40 f4L, 50 f1.4, Samyang 85 f1.4, 70-200 f4L

LOG IN TO REPLY
Wavy ­ C
Senior Member
855 posts
Joined Jan 2005
Belfast, Northern Ireland
Sep 25, 2005 08:20 as a reply to Henrik Ploug's post |  #15

Tnx for posting these test results Henrik. Very well laid out and makes it easy to compare.



----------
It wasn't me!

LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as registered member)

17,188 views & 0 likes for this thread
Sigma 30mm f1.4 vs. Canon 28mm f2.8
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses


Not a member yet? Click here to register to the forums.
Registered members get all the features: search, following threads, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, settings, view hosted photos, own reviews and more...


AAA

Send feedback to staff    •   Jump to forum...    •   Rules    •   Index    •   New posts    •   RTAT    •   'Best of'    •   Gallery    •   Gear    •   Reviews    •   Polls

COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Privacy policy and cookie usage info.

POWERED BY AMASS 1.4version 1.4
made in Finland
by Pekka Saarinen
for photography-on-the.net
Spent 0.00099 for 4 database queries.
PAGE COMPLETED IN 0.02s
Latest registered member is Alin Chiriac
977 guests, 624 members online
Simultaneous users record so far is 5577, that happened on Mar 02, 2016