Pancro stripped lens coating!

[Kasey Drzazga]

I was recently cleaning my set of Xenar III primes as I do any lens, with a tiny bit of Pancro on a lens tissue and to my horror the Pancro seemed to have stripped the coating on the rear element right off! Looks like someone took steel wool to it! Schneider is making good and repairing under warranty but I'm wondering how am I supposed to clean the remaining lenses knowing this? Has anybody seen this before?

 

[Joel Voelker]

Kinda hard to tell from the photo but it looks more like you used too much panchro and didn't wipe it off. It'll leave water stain looking marks. It would be very odd if it actually removed the coating.

 

[Kasey Drzazga]

Kinda hard to tell from the photo but it looks more like you used too much panchro and didn't wipe it off. It'll leave water stain looking marks. It would be very odd if it actually removed the coating.

It’s hard to tell in the photo but it’s defintely the coating. Schneider got back to me and are investigating an issue with the coating of these lenses. They assured me that it’s not me or the Pancro so sorry for the Pancro slander!

 

[Bill Totolo]

Sadly, I too have seen "soft" coatings damaged by proper lens cleaning practices.
Glad Schneider is servicing this for you. You invested in a legit lens manufacturer.

 

[Ilya O.]

I agree what Joel told

Kinda hard to tell from the photo but it looks more like you used too much panchro and didn't wipe it off. It'll leave water stain looking marks. It would be very odd if it actually removed the coating.

Meanwhile, beware Kimtech Science KimWipes. It is just plain abrasive paper which ruined my vintage OKS 300mm coating.

 

[Peter Lyons Collister ASC]

Pancro is a very storied and famous lens cleaner that is almost legendary going back to Mitchell days.

I would swear by it when used on lens tissue.....