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Old Feb 19, 2006, 9:44 AM   #1
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All right here goes.

I got an 18-125mm Sigma kit lens that came with my DL, which I thought was a pretty good all rounder lens.

I recently purchased a 70-300mm Sigma APO DG, darn sharp, darn fine lens and a 24mm F1.8 EX DG Sigma Prime (WOW)

All going well until a day of shooting with the new lenses at the zoo and the beach and then I took some shots with the kit lens. They didn't look as sharp, so I did some testing.

Set the kit to 100mm and took ashot, changed to the 70-300mm and set to 100mm and took the same shot, the difference in the quality and sharpness made me quite disappointed in the kit lens.

Repeated the process, set the kit to 24mm and took a shot and compared it to the 24mm prime, wow the prime was so sharp.

Now I feel that the Kit lens is pulling down the quality of my shots and was considering buying another lens to replace the 18-125mm.

There are a few new lenses out that might fill the void:

17-70mm F2.8-4.5 DC MACRO

18-200mm F3.5-6.3 DC

18-50mm F2.8 EX DC

I realise that zooms won't always be as sharp as primes, but I was stunned at the sharpeness of my new 100-300mm (will post a few soon), it put my 18-125 shots to shame. But I believe that one of these lenses will be better than the Kit and still make agood walk-aboutlens.

Suggestions, comments and advice please, ....Damn this LBA...must have lens...must stop mutterng to myself...:?
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Old Feb 19, 2006, 1:17 PM   #2
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Resistance is futile.....:evil:

Pentax makes a couple of better lenses but they do not have a large zoom rnage.

Ira
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Old Feb 19, 2006, 6:17 PM   #3
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I have no major problems with the sigma 18-125.
Although I do own the FA*28-70 and the FA*80-200, on some occasions I like the zoomrange of the 18-125, as well as the size of this lens.

From what I hear on other forums, the 18-50DC is definately NOT the way to go.
The Pentax DA18-55 is a much better choice.
Other very good option, but big and not very wide, the Tamton 28-75/2.8 XR Di.
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Old Feb 19, 2006, 7:30 PM   #4
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I bought a Pentax-M 200m/4 prime off ebay, the quality and sharpness easily supercedes my Sigma 55-200mm f/4-5.6. Thats what primes are for
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Old Feb 19, 2006, 7:55 PM   #5
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janneman wrote:
Quote:
I have no major problems with the sigma 18-125.
Although I do own the FA*28-70 and the FA*80-200, on some occasions I like the zoomrange of the 18-125, as well as the size of this lens.

From what I hear on other forums, the 18-50DC is definately NOT the way to go.
The Pentax DA18-55 is a much better choice.
Other very good option, but big and not very wide, the Tamton 28-75/2.8 XR Di.
According to http://home1.gte.net/vzeehbv4/html/pentax_primes.html, none of the zoom reaches 'excellent level'
And I doubt any third party zoom can be the exception.
My DL happens to have the da18-55 as the kit.
I ebayed that away at around CAN$100.
Got another older F 35-70 zoom at slightly below that. Definitely it is sharper than the kit zoom. Period.
Also Crashman is just not objective in comparing a zoom lens with prime. They are just unequal.
Daniel
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Old Feb 19, 2006, 9:37 PM   #6
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I agree that a Prime will always be sharper than a zoom, however, what I was really trying to say is are any of these lenses:

17-70mm F2.8-4.5 DC MACRO

18-200mm F3.5-6.3 DC

better than the 18-125mm Kit lens. They are all zoom and therefore fair to compare them.

My 70-300mm is way sharper than my 18-125mm. So I was hoping one of these two, now that I have been told to steer clear of the 18-50mm, would be good to replace my 18-125mm.

Ira, I went with Sigma purely on a cost factor basisand the fact I am about to embark on a two year overseas work odessey where these lenses are going to get a bit of a work out in some strange and rugged locations. :-)


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Old Feb 20, 2006, 1:35 AM   #7
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According to http://home1.gte.net/vzeehbv4/html/pentax_zooms.html, the FA* 80-200mm f/2.8 is an outstanding lens and they don't seem to have tested the FA* 28-70mm f/2.8 but in my personal experiance it is also an outstanding lens.

Tom
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Old Feb 20, 2006, 4:57 AM   #8
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Crashman wrote:
Quote:
Ira, I went with Sigma purely on a cost factor basisand the fact I am about to embark on a two year overseas work odessey where these lenses are going to get a bit of a work out in some strange and rugged locations. :-)

maybe you should try to get hold of the fa 28-205/3.2-4 and the DA18-55/3.5 something, although I maintain that I would not hesitate to bring along my 18-125 copy as it performs very well, except for som distortion and slight vignetting at the wide end when a filter is added. Maybe I just happen to have a good copy.


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Old Feb 20, 2006, 6:26 AM   #9
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danielchtong wrote:
Quote:
janneman wrote:
Quote:
I have no major problems with the sigma 18-125.
Although I do own the FA*28-70 and the FA*80-200, on some occasions I like the zoomrange of the 18-125, as well as the size of this lens.

From what I hear on other forums, the 18-50DC is definately NOT the way to go.
The Pentax DA18-55 is a much better choice.
Other very good option, but big and not very wide, the Tamton 28-75/2.8 XR Di.
According to http://home1.gte.net/vzeehbv4/html/pentax_primes.html, none of the zoom reaches 'excellent level'
And I doubt any third party zoom can be the exception.
My DL happens to have the da18-55 as the kit.
I ebayed that away at around CAN$100.
Got another older F 35-70 zoom at slightly below that. Definitely it is sharper than the kit zoom. Period.
Also Crashman is just not objective in comparing a zoom lens with prime. They are just unequal.
Daniel
OOOOOOPS!!!!!
When you were talking about the 18-50 I assumed you were talking about the
3.5-5-6 DC instead of the 2.8 DC. I don't know about that one....
Sorry
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Old Feb 20, 2006, 7:13 AM   #10
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I was sort of hoping someone might have one of these lenses and can tell me what they are like.

Janneman, The 18-50mm F2.8 EX DC is a new lens and I would like to think at the price they are asking that itwould bepretty good.


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