Okay, as the title suggests, I've got more lenses than I really need right now and two of them are very similar to each other, so perhaps it's time to re-home one of them by listing it on eBay. But which one to list and which to keep? The lenses in question are a Sigma 28-80mm f3.5-5.6 Aspherical Macro Zoom and a Quantaray 28-90mm f3.6-5.6 Aspherical Zoom. Comparing the two lenses side by side, they look almost identical, as well they should since the Quantaray lens was manufactured by Sigma for Ritz Camera.
The Quantaray, which I've had for about three years, has the advantage of a slightly longer reach (90mm vs. 80) but on the downside, it has a plastic mount. Pentax Forums rates this a lens a respectable 8.67. Somewhere, I have the original box for this lens, so it might be a little more attractive on eBay.
A recent acquisition, the Sigma has a shorter reach (80mm vs. 90) and although it has the same plastic construction as the Quantaray, it does have a metal mount. It's also got that nifty little 'Macro/Normal' switch on the side, not that it really does anything except lock the zoom ring in at 80mm--or does it? Pentax Forums rates this lens more than half a point lower at 7.93.
Whichever lens I keep will have a semi-permanent home on the front of my K100D as its default "walkin' around" lens. I'll probably be doing a shoot-out with the two lenses this weekend to determine a winner, but if anyone wants to venture an opinion, feel free.
Last edited by E-man; 09-16-2015 at 05:58 PM.
Reason: more information