Trying out a lens I found at a sale a couple of days ago, from a company I've never heard of before:
It feels to me like one of those generic private label lenses from the 80s or 90s; contract Asian manufacturers like Sun or Samyang made lenses that were either sold as a major chain's private label brand (like 'Focal' for K-Mart), or as a discount brand at other retailers (like 'Albinar' or 'Hanimex'). I see a lot of them at sales, when the owner apparently couldn't afford a first-party lens. But film era zooms with this focal range were rare, and I've never seen a generic one before this lens; generics are usually one of the standard primes (28/35/50/135) or long teles like an 80-200. And while I've seen a number of generic lens brands, I've never seen 'Magnum' before.
Anyway, it intrigued me for the zoom range and also the small size; and since it was bundled with a Minolta XG7 SLR for just $20, I figured I wasn't losing anything if it didn't pan out. So how did it do?
20260425-SDIM0269 by
Travis Butler, on Flickr
Sigma fp, Magnum CCT 28-50
Not terrible, certainly; reasonably sharp. Contrast is OK but benefits from boosting black levels. Competent but not outstanding; I can get good pics with it, but nothing that grabs me and makes me want to use it, either.
20260425-SDIM0273 by
Travis Butler, on Flickr
OOF areas look pretty good close to the focal plane, but bokeh gets very busy in the background. Lots of bokeh balls, but doesn't look like the kind of thing that would charm bokeh enthusiasts.
20260425-SDIM0278 by
Travis Butler, on Flickr
Not terribly sharp (unless I missed the focus, which is entirely possible!), but quite a bit of detail.
20260425-SDIM0295 by
Travis Butler, on Flickr
Some good detail from the clouds, and doesn't look like much in the way of flare.
20260425-SDIM0307 by
Travis Butler, on Flickr
I like the colors; but again, while they're nice, I've gotten equally nice color from other lenses.
On the whole... it certainly isn't bad, and like I said I can get some decent pics out of it. But apart from the size, I haven't seen anything yet that makes me want to use it; and the OM Zuiko 28-48 is even smaller and has arguably better IQ, while the Minolta 24-50 is larger but a full level up in IQ.