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Drop-in Filters for a FDn 300mm F4


brian hanson

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Where can I find these things? I have two of the regular 1X ones,

but it looks like it would be pretty hard to take the glass out and

put a different filter in. Also, is it necessary to have glass in

the filter holder? These things always seem to magically get dirty,

even though I never remove them from the lens. Also, they seem to

be a touch gray, which must add at least a little neutral density.

I need a 25A drop-in 34mm filter for this lens. Thanks. Brian.

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Yes there has to be a filter in this position for the optical formula of the lens.

 

As to finding a 25A well not really Canon made a red how close to a 25A it is I don't know but it is a red. Your only option is to find one through ebay or a dealer.

 

Email me direct ASAP I believe I know where there is a person selling a RED 34mm drop in.

 

Mark W.

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