This is the first time I have used calumet.I ordered the canon 85 1.2 when it arrived it had a scuff on lens and a slight scratch.i phoned customer services and got a replacement within the week.i had to contact customer services to find out I was getting a replacement they Didn't contact me which I didnt find helpful.Also on both occasions the boxes I recieved had been opened prior to me receiving them which did not give me confidence ..overall I am happy with the second lens but I did not enjoy the process which I had to go through nor having to wait a extra 5 days for