Re: Opinions on standard zooms

2002-04-16 Thread Aaron Reynolds

On Monday, April 15, 2002, at 01:23  PM, Brendan wrote:

 DO NOT GET THAT SIGMA I have the 28-105 f2.8-4 and
 it optically is very poor, a better choice would be
 the cheaper 28-105 F4-5.6 sigma which is much better
 and cheaper.

Heh, Brendan's 28-105 f2.8-4 makes lamp posts look like they're in 
Candyland on a hot summer day.

-Aaron
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Re: Opinions on standard zooms

2002-04-16 Thread Flavio Minelli

John Leonard wrote:
 ... 
 I'm wondering whether that Sigma zoom is a bit too budget.

Probably, yes.

 I'm tempted to
 replace it with a 28-105 internal-focussing (I just HATE that filter ring
 turning). Have considered Pentax, Sigma, Tokina and Tamron.

I've been satisfied enough with the Tokina but its coating and flare
resistance just suck. Pentax has been already covered. The Tamron and
Sigma 28-105/4-5.6 are pretty good and inexpensive.

 Like the idea of
 faster lens, so Sigma 28-105 F2.8-4 very attractive, but Sigma again? Need
 to keep below 200 UK pounds (ideally).

Forget it. It's a really bad lens.

 
 I've noticed that IF lenses seem to whirr more on focussing. Could the
 increased load on the camera auto-focus drive be a problem? 

IMO, no.

I'm sure Pentax
 would say using anything but a Pentax lens might wreck the camera, but what
 is the truth?
 ...

It doesn't matter in the slightest, as long as the lens fit properly.
There has been some discussion about some Vivitar MF lenses getting
stuck on AF Pentax Bodies but in my experience it didn't crop up. In
modern AF cameras and lenses there may be some grade of incompatibility
WRT electronic innards (i.e. misreading of aperture values and the like.
Some Sigmas seem to have that, sometimes).

Bottom line: if you want speed and quality go for an affordable set of
second hand primes. Relatively fast and good quality zooms are pretty
heavy and expensive.

For a comparative chart I laid down some time ago you can check:
http://space.tin.it/arte/flamin/28-105.html I can't check it right now
but it should still be there.

Ciao, Flavio
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Opinions on standard zooms

2002-04-15 Thread John Leonard

I have a Pentax MZ-5n which I use mostly with the Sigma 28-80 F3.5-5.6
Aspherical which I got with the camera. Photos seem to have less punch
(particularly when the sun isn't shining) than ones I took on an MZ-50 with
standard Pentax 28-70 lens.

I'm wondering whether that Sigma zoom is a bit too budget. I'm tempted to
replace it with a 28-105 internal-focussing (I just HATE that filter ring
turning). Have considered Pentax, Sigma, Tokina and Tamron. Like the idea of
faster lens, so Sigma 28-105 F2.8-4 very attractive, but Sigma again? Need
to keep below 200 UK pounds (ideally).

I've noticed that IF lenses seem to whirr more on focussing. Could the
increased load on the camera auto-focus drive be a problem? I'm sure Pentax
would say using anything but a Pentax lens might wreck the camera, but what
is the truth?

Thanks,

John Leonard,
Surrey, UK.
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Re: Opinions on standard zooms

2002-04-15 Thread Bob Rapp

From: John Leonard [EMAIL PROTECTED]



 I have a Pentax MZ-5n which I use mostly with the Sigma 28-80 F3.5-5.6
 Aspherical which I got with the camera. Photos seem to have less punch

John,
Obviously, you are concerned with quality. Surprise your self and get
any of the used single focal length lenses you can find. Zooms, while
connivent, do not offer the quality of image that a standard will offer. If
you want a quality zoom, prepare to spend large sums of money. Evaluate what
focal lengths you use and get standard lenses of those focal lengths - AF or
MF.
I used quality zooms myself but returned to single focal length lenses -
quality of image was the reason. Evaluate your needs and make your choice.

Bob
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Re: Opinions on standard zooms

2002-04-15 Thread Alin Flaider

John wrote:

JL I have a Pentax MZ-5n which I use mostly with the Sigma 28-80 F3.5-5.6
JL Aspherical which I got with the camera. Photos seem to have less punch
JL (particularly when the sun isn't shining) than ones I took on an MZ-50 with
JL standard Pentax 28-70 lens.

  No wonder. This particular lens (FA 28-70/4) has very good contrast.

JL I'm wondering whether that Sigma zoom is a bit too budget. I'm tempted to
JL replace it with a 28-105 internal-focussing (I just HATE that filter ring
JL turning). Have considered Pentax, Sigma, Tokina and Tamron. Like the idea of
JL faster lens, so Sigma 28-105 F2.8-4 very attractive, but Sigma again? Need
JL to keep below 200 UK pounds (ideally).

  I heard the only good Sigma in this range is the 28-70/2.8.

JL I've noticed that IF lenses seem to whirr more on focussing. Could the
JL increased load on the camera auto-focus drive be a problem?

  This is likely due to the steep stroke rather than the load.
  IF by design moves less glass on shorter range, so it's supposed to
  put less strain on the AF motor.
 
JL I'm sure Pentax
JL would say using anything but a Pentax lens might wreck the camera, but what
JL is the truth?

  The general consensus is that Pentax lenses have faster AF. The
  communication protocol between the lens and the body has a
  significant role, and at least Sigma hasn't licensed it.

  Servus, Alin
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Re: Opinions on standard zooms

2002-04-15 Thread ERNReed

In a message dated 4/15/2002 2:39:57 AM Central Daylight Time, 
[EMAIL PROTECTED] writes:


 I have a Pentax MZ-5n which I use mostly with the Sigma 28-80 F3.5-5.6
 Aspherical which I got with the camera. Photos seem to have less punch
 (particularly when the sun isn't shining) than ones I took on an MZ-50 with
 standard Pentax 28-70 lens.
 
 I'm wondering whether that Sigma zoom is a bit too budget.

And when you use the Pentax lens on the -5n, how do those results compare?

ERNR
My photographs hang on the virtual walls at http://members.aol.com/ernreed
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Re: Opinions on standard zooms

2002-04-15 Thread Joseph Tainter

The following Pentax zooms will fit your budget and are highly regarded:

FA 28-70 f4
FA Power Zoom 28-105 f4-5.6 (but try it first, as it is a heavy lens,
some feel too heavy on an MZ/ZX body)
FA 24-90 (new, and every zoom user seems to want one)

You might also look for:

FA 28-105 f3.2-4.5? (This is new, and not yet available in the U.S. so I
can't give you a review. There's also an FA 28-105 made by Tamron. Avoid
that. You'll know the Tamron by the 62 mm. filter thread. The new Pentax
has a 58 mm. thread.)

Some of these might be available used from KEH.

Joe
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Re: Opinions on standard zooms

2002-04-15 Thread Brendan

DO NOT GET THAT SIGMA I have the 28-105 f2.8-4 and
it optically is very poor, a better choice would be
the cheaper 28-105 F4-5.6 sigma which is much better
and cheaper.

--- John Leonard [EMAIL PROTECTED] wrote:
 I have a Pentax MZ-5n which I use mostly with the
 Sigma 28-80 F3.5-5.6
 Aspherical which I got with the camera. Photos seem
 to have less punch
 (particularly when the sun isn't shining) than ones
 I took on an MZ-50 with
 standard Pentax 28-70 lens.
 
 I'm wondering whether that Sigma zoom is a bit too
 budget. I'm tempted to
 replace it with a 28-105 internal-focussing (I just
 HATE that filter ring
 turning). Have considered Pentax, Sigma, Tokina and
 Tamron. Like the idea of
 faster lens, so Sigma 28-105 F2.8-4 very attractive,
 but Sigma again? Need
 to keep below 200 UK pounds (ideally).
 
 I've noticed that IF lenses seem to whirr more on
 focussing. Could the
 increased load on the camera auto-focus drive be a
 problem? I'm sure Pentax
 would say using anything but a Pentax lens might
 wreck the camera, but what
 is the truth?
 
 Thanks,
 
 John Leonard,
 Surrey, UK.
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