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Old 30-05-2016, 11:06 AM
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bojan is offline
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,172
Anybody knows anything about this (Rocolax) filter?
I am planning to use it as a drop-in filter for my Canon 400mm F2.8 lens, on ebay it is only AU$78 (+ waiting)
Looks like people did use it successfuly..

Hoya also has filters that may be suitable:
I couldn't find price info.

It seems Rocolax is slightly inferior, compared to Hoya.
But price/performance ratio is most likely superior, see here (from UV_IR_cut):
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Click for full-size image (HOYA_uv-ir_curve.jpg)
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Last edited by bojan; 30-05-2016 at 01:49 PM.
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