John, thank you. I'll check with Zack's about the CLA. The lens came as part of kit (guess you would call it that in large format) which included a excellent condition 5X7 Noba studio camera, 4X5 reducing back, roll film back, extra lens board and a Caltar Pro Series 210mm f6.1 on the camera. Really was interested in the kit because of the Wollensak which is on a Burke and James lensboard that can be used with my B&J 8X10 and 5X7 reducing back. Will sell the Noba locally. It is truly in beautiful condition and very functional. Was glad to get the Wollensak at a favorable price. Bill Barber