36mm filters in 2" filter wheel?

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John Walsh avatar

Hi all,

I was set on moving from DSLR to mono this year but I think I will go with and ASP-C OSC(2600MC pro) in the end.

There hasn’t been a fully clear night since the end of September and I’m not sure if I would be able to make the best use of Mono in practical terms.

Mono is something I might upgrade to in future.

With this in mind, I am thinking of getting the OSC camera with an EFW, with a view to using the same EFW if and when I do go Mono.

The convenience of not having to redo flats, automating a broadband and dual NB session, as well as having a dark filter for doing my darks being the principal reason for the EFW in the first place.

The dual narrowband filters being mostly 2”, it will have to be a 2” filter wheel.

However I would not like to have to get 2” mono filters which are significantly more expensive than their 36mm unmounted counterparts. So I am wondering if there exists and adapter that can accommodate a 36mm filter in a 2” filter wheel? Not sure if this is even a good idea or not.
Perhaps a filter drawer is the better option..
What do people think?

Many thanks in advance

Respectful
andrea tasselli avatar
A filter drawer is a way cheaper and practical option for sure. You can still get most if not all the filters you might need in the 36mm variants. As far as I know there are 36mm adapter for mounting on a 2" carousel but if you aren't planning for a FF in a future that would be essentially pointless.
John Walsh avatar

andrea tasselli · Nov 9, 2025, 05:26 PM

A filter drawer is a way cheaper and practical option for sure. You can still get most if not all the filters you might need in the 36mm variants. As far as I know there are 36mm adapter for mounting on a 2" carousel but if you aren't planning for a FF in a future that would be essentially pointless.

Thanks Andrea. I suppose I was looking at dual NB like the L-Ultimate etc and they seem to be only either 2” or 1.25”

andrea tasselli avatar
It would be probably less expensive and complicated to get another carousel when and if switching to mono down the road.