Hello, This type of equipment is more than enough for me to use what I have. Easy to set up, not really weak either. The rings set is correct. Unlike other reviews, I do not see the point of a hanger. Clarification as regards the ring 'turns' and which should be able to block: Niet! Sometimes it is necessary to light up or down, so that the ring is free, is absolutely not annoying (to me) Other precision, it is given to trigger the 100th, but rather try to 60th, it will be better et..de far! At 100th; it's downright impossible mission, except in the case of a full-frame, but I have not tested. My test was done with a Pentax K5, a 2.8 / 28 75 on a cap of a CO, an ashtray and an electronic part. FOr me, it's OK, and as I do not get up at night to make macros, this type of ring is perfect!
