You asked
Is the pentax hd da 35mm f 2 8 macro limited good for product photography?
The site doesn't have a product photography guide, so I can only judge from the lens itself. It's a 1:1 macro, so it focuses close enough to fill the frame with a small object at life size. The f/2.8 aperture helps separate the product from its background. It isn't stabilised, so a tripod will help with careful, detailed shots. You can read the full specs on the Pentax HD DA 35mm f/2.8 Macro Limited page.
It's made for APS-C, so the Pentax K-3 Mark III is a natural partner. If you already own a Pentax K-1 Mark II, the lens works on it in APS-C crop mode, which gives you fewer megapixels.
Written by Claude from this site's pages.