Pentax Helicoid Extension Tube B

This is a practical thing for macro work: Not only a macro ring but a flexible macro ring that you can extend manually. I sold my extension tubes for this... Mechanically very good (like the old Pentax K-series). BUT it doesn't support automatic aperture - so you have to focus the lens wide open and when finished you have to stop down. This is o.k. for serious macro work on a tripod but not for recently macro shots. Therefor I bought me a true macro lens.

Practical compared to a set of extension tubes Mechanical build quality

No automatic aperture - Only stop-down working

Some extension tubes, macro lenses and macro-achromat-lenses

not needed - but at pentax here in Hamburg/Germany they're very kind