My Sigma 12-24mm was returned as faulty to my supplier (London Camera Centre).
They sent it to Sigma for repair. Sigma stated that it was far too old & they couldn't help.
My supplier has issued a refund, which is great, but now I feel I can’t live without a replacement of some kind.
On the second-hand market, the two I’m considering are
Sigma 15-30mm f/3.5-4.5 D EX, an oldie but by all accounts quite reliable. They’re noted for being cheap, but very prone to flare.
Nikon 14-24 f2.8 G ED, over three times the price I paid for the Sigma 12-24, but rather more reliable.
Seems to get good reviews.
I appreciate the two are worlds apart..
Are there other possibilities in a similar zoom range I’ve not considered, that won’t cause my wife to say things like, ‘you spend far too much on photography gear. Why can’t you take an interest in keeping ferrets instead?’