Originally posted by RioRico ..........
EDIT: I searched the lens DB, no hits. I found the Cosinon 55/1.5 Club but this lens just says Cosina, not Cosinon, so I don't know if they're the same. This has 58mm filter thread. Should I spend or save my precious few dollars? Help!
Here you go:
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/41357-cosina-55mm-1-1-2-club.html
Also, when searching for something with less than 4 characters (such as 1.2), use the advanced search - there will be a custom google search at the bottom:
here's what you'll get when you search for 55mm 1.2:
55mm 1.2 - Google Search
And to answer your question whether you should buy it or not:
I too contemplated buying the same lens. Seeing as the M50 1.4 is around 75-125 and the A50 1.4 is about 100-200, I think that a start price of $150 is fair, considering it is a 1.2. If you read through the threads shown in the 55mm 1.2 search you'll see that this lens is quite good.
Also, there is a K 50mm 1.2 in the marketplace, albeit at a higher price.
In the end, only YOU can determine whether to spend or save YOUR precious few dollars.
As for me, after reading through all the 55mm 1.2 and 50mm 1.2 threads, I'm waiting to receive my copy
Hint: If you check the sellers completed listings, you'll find he sold quite a few of these beasts. Who knows? - he might have a couple more to sell, as Just1MoreDave has indicated