Deletion of Sigma 60mm f/2.8 DN Art

Comment: WP:NOTDIRECTORY, , borderline .  May perhaps merit a mention in a more general article about the product family.  There are sites and magazines dedicated to such merchandise which will advertize every product, Wikipedia is an encyclopedia.  It should cover pioneering devices and technology but not catalog everything.  Think about what people will be looking for in an encyclopedia in 20 years from now; they will expect coverage of but the most notable products, those which pioneered innovations and influenced a generation.  This will also result in complete articles which have much to say rather than many stubs
Stance: delete
Cited policy: Wikipedia:Too soon (WP:TOOSOON||WP:ADVERT)

Comment: Wikipedia is |not a catalog of every product which is offered for sale. Two reviews are presented as references, but one of them, Digital Photography Review, is owned by Amazon and includes a click link to buy the lens at Amazon, so I discount it as pretty much a sales site. Most lenses and cameras which have been offered for sale in the last hundred years or so have had some reviews in photo magazines. Coincidentally, those same magazines which review camera products  sell pages of advertising to the companies whose products they review. Therefore I discount their being "independent coverage" in some cases
Stance: delete
Cited policy: Wikipedia:What Wikipedia is not (WP:NOT)