Thickness of 90mm Baader D-ERF?

[Rusted]

Hi

Quick question on thickness of Baader's 90mm D-ERF:

I read online somewhere that they had standardized all filter sizes on 8mm glass.

Baader's own website clearly says 6mm. An independent sales website says 5.5mm.

The box clearly states 5mm which is confirmed with vernier calipers.

I've spent the morning preparing a 10mm thick aluminium adapter ring based on false information.

Anyone have a 90mm D-ERF with the same thickness as any of the above?

[Peter Drew]

The 90mm D-ERF that I have in front of me right now has a thickness of 5mm. Get one quick before they reduce to nothing!   

[Rusted]

Thanks, Peter.

Mine has arrived in the post and left me wanting a bit of a discount to save my last kidney.

I'd been chain drilling a nice piece of 10mm alu. all morning prior to nose dripping on the lathe.

Now I can use something a little less 'deliberate' and save on tissues. 

BTW: Another dollop of praise for Teleskop-Express!