Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Nikon Lenses

Reply
 
Thread Tools Search this Thread
Old May 10, 2008, 11:38 AM   #1
Senior Member
 
Telecorder's Avatar
 
Join Date: Dec 2005
Posts: 490
Default

Not looking good for the 150-500 to be anywhere near the Bigma,,, such a shame...
I put the MTF charts side by side and its apparent the Bigma will still reign...
http://i33.photobucket.com/albums/d7...50-500-MTF.jpg

http://www.sigma-photo.co.jp/lens/tele/150_500_5_63.htm
http://www.sigma-photo.co.jp/english...0_500_4_63.htm


Telecorder is offline   Reply With Quote
Sponsored Links
Old May 11, 2008, 10:46 PM   #2
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

May be not...

-> On a full frame camera the MTF may be not be as good, but on a cropped camera the curve portion pass 12.5mm is a don't care. Plus when used on a tele only the center part of the picture is critical, the peripheral vision is part of the bokeh and in this case (i.e. the center) the new 150-500mm MTF exceeds that of the Bigma!
The new 120-400 OS however sure looks better that the old 80-400 though
NHL is offline   Reply With Quote
Old May 12, 2008, 7:06 AM   #3
Senior Member
 
Bob Nichol's Avatar
 
Join Date: Apr 2003
Location: Eastern Ontario Canada
Posts: 822
Default

Comparing the Bigma at 50mm to to the new lens at 150mm isn't accurate. You would need to see the Bigma graph at 150mm.
The 500mm graphs seem to give the edge to the 150-500mm if I read them correctly however.
Bob Nichol is offline   Reply With Quote
Old May 12, 2008, 2:06 PM   #4
Senior Member
 
Telecorder's Avatar
 
Join Date: Dec 2005
Posts: 490
Default

Bob Nichol wrote:
Quote:
Comparing the Bigma at 50mm to to the new lens at 150mm isn't accurate. You would need to see the Bigma graph at 150mm.
The 500mm graphs seem to give the edge to the 150-500mm if I read them correctly however.
You are, of course, correct and I should have pointed this aspect out. ..

DPR's mikeyyy wrote:
> Updated mtf charts
>
http://www.sigma-photo.co.jp/lens/tele/150_500_5_63.htm
>
Thanks, Mike...!
FWIW-->
Apparently, Sigma had posted the wrong MTF charts for the 150-500 as incorporating their new posting versus the Bigma charts now reflects the following...





After Mikeyyy pointed this out, I did a bit more reading of info on reading MTF charts and now have to say that this more in depth understanding and with the new charts, I'm changing my opinion to be more slightly optimistic about the 150-500.

Paraphrasing Canon's guidance of how to read the above MTF chart, as I now understand it--
The upper Red lines refer to a spatial frequency of 10 lines/mm (equates to Contrast or how accurate a lens' senses differences between similar shades)
The lower Green lines refer to a spatial frequency of 30 lines/mm (resolving or sensing of sharpness of fine details)
A solid line refers to sensing of lines parallel to radius from center ___ (S curves)
The dotted lines refer to sensing of lines tangential to radius ||| (M curves)
Above chart values refer to maximum aperture (most all lenses usually benefit when stopped down)
The contrast curve (upper) is the most important when evaluating differences in lenses and liklihood a lens will be a good performer

The closer the S and M (dotted curves) curves are in line, the more natural the blurred image becomes (more pleasing Bokeh).

An MTF value of 0.8 or more at 10 lines/mm (especially the Upper/Contrast/Red) curve indicates a superior lens; 0.7 -- good
An MTF of 0.6 or more at 10 lines/mm indicates a satisfactory image.

Since most of us use crop factor bodies, such as my D50, any part of the curve on the right - past ~14-mm distance from the center of the lens, is irrelevent -- as this portion is for the edges on a 35-mm FF sensor and is cropped on a crop sensor.

In the above charts, I note that the 150-500 has about equal values for the upper contrast lines and slightly better values for the resolution/lower curve. I placed colored dots on the corresponding values between the two lens for easier comparisons.

All in all, the newest calculated MTF values would seem to indicate that the 150-500 lens may have as good of an IQ as the Bigma; perhaps better when stopped down...

Real world, hand's on reviews will tell the true story...


Telecorder is offline   Reply With Quote
Old May 16, 2008, 5:46 PM   #5
Senior Member
 
Telecorder's Avatar
 
Join Date: Dec 2005
Posts: 490
Default

The new 150-500's are starting to get out in Japan... One novice has posted some initial 'snapshots' with his 150-500 on a Canon that seem somewhat promising...

http://picasaweb.google.co.jp/cermaktomas




Telecorder is offline   Reply With Quote
Old Jun 9, 2008, 12:06 PM   #6
Senior Member
 
Telecorder's Avatar
 
Join Date: Dec 2005
Posts: 490
Default

Still waiting for Nikon-mount versions to get out and be 'reviewed' but here's one Canon-mount set of images that bode well...

http://www.birdingworld.co.uk/Sigma%20Photos.htm
Telecorder is offline   Reply With Quote
Old Jun 10, 2008, 7:32 AM   #7
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

Telecorder wrote:
Quote:
Still waiting for Nikon-mount versions to get out and be 'reviewed' but here's one Canon-mount set of images that bode well...

http://www.birdingworld.co.uk/Sigma%20Photos.htm
With results like theses the EF 100-400L looks pretty old in the tooth - The major brands really need some updating in their line-up, i.e affordable (and now stabilized) 500mm zooms
-> Also notice the creamy bokeh even at f/9 on the last few linked images !!!
NHL is offline   Reply With Quote
Old Jun 24, 2008, 10:24 PM   #8
Senior Member
 
bayourebel's Avatar
 
Join Date: Jan 2006
Posts: 2,561
Default

Do anyone have an idea when this lens will be available for purchase for the Nikon (D300)? I have tried to locate it several places to no avail, but yet, seems to be out for Cannon.
bayourebel is offline   Reply With Quote
Old Jun 25, 2008, 4:35 PM   #9
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

Let the Canon's folks be the guinea pig... :lol::-):G
-> Seriously though I saw you can pre-order from Adorama
NHL is offline   Reply With Quote
Old Jul 10, 2008, 5:41 PM   #10
Senior Member
 
Join Date: Apr 2008
Posts: 144
Default

Will this lense work with a D60? I'm not sure if the 120-400 OS will work with the D60 either.
Casa B is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 5:05 AM.