Cleaning IDAS filter

[kirkster501]

^^^^

Any tips to share please? Despite my great care with this expensive piece of glass, the slight dew from the other night coalesced and ran when i put the filter in the box leaving a slight streak. Nothing disastrous but part of me thinking such a beast in the imaging train ought to be crystal clean....

[sloz1664]

I'd try Baader Wonder Fluid. That's the standard for optical lens.

The coating on the Hutech is quite tough, but as you say It's an expensive bit of glass.

cheers

steve