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FHPhotographer · 08-16-2008, 04:36 PM

I'm looking for something comparable in quality to the Tamron 28-75 but lighter for a K100. I tried the Sigma 70 macro (about the same weight as the Tamron), and while that might work on the larger K10/20, that 500g + feels to forward-leaning and unablanced on the K100.

I don't much care about macro, but I do want high IQ. Am I on a fools errand or can I get quality in a fast (f/2.8 would be great) and light lens for general use?
FHPhotographer

creampuff · 08-16-2008, 04:46 PM

Simple, the FA 28-70mm f/4 is small, light and compact and gives good image quality. Constant f/4 with aspherical element. And it's cheap too.

K100D Super FA 28-70mm f/4

deejjjaaaa · 08-16-2008, 04:52 PM

Originally posted by FHPhotographer

I'm looking for something comparable in quality to the Tamron 28-75 but lighter for a K100. I tried the Sigma 70 macro (about the same weight as the Tamron), and while that might work on the larger K10/20, that 500g + feels to forward-leaning and unablanced on the K100.

I don't much care about macro, but I do want high IQ. Am I on a fools errand or can I get quality in a fast (f/2.8 would be great) and light lens for general use?
FHPhotographer

all "2x-7x" w/ 2.8 are FF lenses - so they can't be "light"... unless you will go for some less qualify 2.8-4.x (Sigma has one for example @ ~250g - 28-70mm F2.8-4 DG - but certainly it is not a high IQ lens)... or something like Tamron 17-50/2.8 @ 430g and 67mm filter - not big.

Lowell Goudge · 08-16-2008, 04:58 PM

Can you define comparable in quality?

If you mean as sharp and as fast, it will not be lighter.

If you want a reasonable quality, stopped down, It is a little soft wide open, and not as fast as the tamron, look at the pentax FA 28-80 F3.5-4.6 Power zoom.

I picked one up for $10

deejjjaaaa · 08-16-2008, 04:59 PM

Originally posted by creampuff

Simple, the FA 28-70mm f/4 is small, light and compact and gives good image quality.

here is the link to the person w/ many photos taken w/ that lens and you
can see the quality in higher resolution (1800 x 1200).

Flickr: attack11's stuff tagged with fa2870f40

Roburg · 08-17-2008, 03:56 AM

I recently bought the FA 28-70 f4 and its a great lens and very light as well. My previous 'walk-around' was the A35-105 which must weight twice as much, but it may be a fraction sharper (and has manual focus of course).

08-16-2008, 04:36 PM	#1
FHPhotographer Veteran Member Join Date: Jul 2008 Location: Fountain Hills, AZ Photos: Gallery \| Albums Posts: 1,297	A good 28-70 (app) lens for K100? I'm looking for something comparable in quality to the Tamron 28-75 but lighter for a K100. I tried the Sigma 70 macro (about the same weight as the Tamron), and while that might work on the larger K10/20, that 500g + feels to forward-leaning and unablanced on the K100. I don't much care about macro, but I do want high IQ. Am I on a fools errand or can I get quality in a fast (f/2.8 would be great) and light lens for general use? FHPhotographer

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08-16-2008, 04:46 PM	#2
creampuff Veteran Member Join Date: May 2007 Location: Singapore Photos: Gallery Posts: 3,955	Simple, the FA 28-70mm f/4 is small, light and compact and gives good image quality. Constant f/4 with aspherical element. And it's cheap too. K100D Super FA 28-70mm f/4

08-16-2008, 04:52 PM	#3
deejjjaaaa Veteran Member Join Date: May 2007 Location: steel city / rust belt Posts: 2,043	Originally posted by FHPhotographer I'm looking for something comparable in quality to the Tamron 28-75 but lighter for a K100. I tried the Sigma 70 macro (about the same weight as the Tamron), and while that might work on the larger K10/20, that 500g + feels to forward-leaning and unablanced on the K100. I don't much care about macro, but I do want high IQ. Am I on a fools errand or can I get quality in a fast (f/2.8 would be great) and light lens for general use? FHPhotographer all "2x-7x" w/ 2.8 are FF lenses - so they can't be "light"... unless you will go for some less qualify 2.8-4.x (Sigma has one for example @ ~250g - 28-70mm F2.8-4 DG - but certainly it is not a high IQ lens)... or something like Tamron 17-50/2.8 @ 430g and 67mm filter - not big.

08-16-2008, 04:58 PM	#4
Lowell Goudge Pentaxian Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 16,319	Can you define comparable in quality? If you mean as sharp and as fast, it will not be lighter. If you want a reasonable quality, stopped down, It is a little soft wide open, and not as fast as the tamron, look at the pentax FA 28-80 F3.5-4.6 Power zoom. I picked one up for $10

08-16-2008, 04:59 PM	#5
deejjjaaaa Veteran Member Join Date: May 2007 Location: steel city / rust belt Posts: 2,043	Originally posted by creampuff Simple, the FA 28-70mm f/4 is small, light and compact and gives good image quality. here is the link to the person w/ many photos taken w/ that lens and you can see the quality in higher resolution (1800 x 1200). Flickr: attack11's stuff tagged with fa2870f40

08-17-2008, 03:56 AM	#6
Roburg Junior Member Join Date: May 2008 Location: Canberra, Australia Photos: Gallery Posts: 34	I recently bought the FA 28-70 f4 and its a great lens and very light as well. My previous 'walk-around' was the A35-105 which must weight twice as much, but it may be a fraction sharper (and has manual focus of course).

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A good 28-70 (app) lens for K100?

PF Holiday Loyal Site Supporter Special | December Pentax Lens Tournament