400mm lens & up

Yes it IS sharp.
http://www.pbase.com/cameras/sigma/50_500_4_63_ex_dghsm

You've shown it makes nice 500 x 800 pixel images; most consumer
zooms will do that.
How about showing some 100% crops, including some with tough lighting
situations? That's where you see the difference between fixed
focal length lenses and zooms, and that is what makes the difference
in impressive enlargements. If you only want to show
small web images, then consumer zooms are fine.

Roger


http://baron.phpnet.us/50-500/crw_51...?size=1&exif=Y

Saguenay wrote:
Yes it IS sharp.
http://www.pbase.com/cameras/sigma/50_500_4_63_ex_dghsm
You've shown it makes nice 500 x 800 pixel images; most consumer
zooms will do that.
How about showing some 100% crops, including some with tough lighting
situations? That's where you see the difference between fixed
focal length lenses and zooms, and that is what makes the difference
in impressive enlargements. If you only want to show
small web images, then consumer zooms are fine.

Roger


Looks pretty good, but that doesn't tell the complete story.
http://baron.phpnet.us/50-500/crw_51...?size=1&exif=Y

click on the zoom button below the MTF chart for the 50-500 lens
and note green line (30 cycles/mm) never is above 80%, and
the dashed curve is around 50% at 500mm.
http://www.sigmaphoto.com/lenses/len...07&navigator=3

Now compare a fixed focal length lens, 500mm:
http://www.usa.canon.com/consumer/co...mode lid=7318

A low cost fixed focal length telephoto like this one
also does better:
http://www.usa.canon.com/consumer/co...mode lid=7314

Roger

"Roger N. Clark (change username to rnclark)" a écrit
dans le message de news: ...

click on the zoom button below the MTF chart for the 50-500 lens
and note green line (30 cycles/mm) never is above 80%, and
the dashed curve is around 50% at 500mm.
http://www.sigmaphoto.com/lenses/len...07&navigator=3

Now compare a fixed focal length lens, 500mm:
http://www.usa.canon.com/consumer/co...mode lid=7318

A low cost fixed focal length telephoto like this one
also does better:
http://www.usa.canon.com/consumer/co...mode lid=7314

Roger


The original poster is searching for a versatile zoom. not a fixed focal low
cost (?) L glass.
And is somewhat budget wise.

Case closed.

mb

In article ,
says...

"Roger N. Clark (change username to rnclark)" a écrit
dans le message de news: ...

click on the zoom button below the MTF chart for the 50-500 lens
and note green line (30 cycles/mm) never is above 80%, and
the dashed curve is around 50% at 500mm.
http://www.sigmaphoto.com/lenses/len...07&navigator=3

Now compare a fixed focal length lens, 500mm:
http://www.usa.canon.com/consumer/co...mode lid=7318

A low cost fixed focal length telephoto like this one
also does better:
http://www.usa.canon.com/consumer/co...mode lid=7314

Roger


The original poster is searching for a versatile zoom. not a fixed focal low
cost (?) L glass.
And is somewhat budget wise.

Case closed.

mb

Not really. The OP said he has a 75-300 zoom and is looking for a lens
of 400mm or greater. The fact that he lists a few zooms doesn't
necessarily mean that he wants an additional zoom, it may just as easily
mean that he wasn't aware that a 400mm 'L' was available in his price
range.

It's also worth considering that the 'low cost' lens Roger indicated is
cheaper than the 100-400 L the OP was taking as his baseline.

For what it's worth, I'm more than happy with my 100-400L.

T.
--
Do Binary Tripods have 11 legs ?