ZWO filter holder

[MarkInSpace]

Hi All, I really like the ZWO Filter drawer, but I worried about how to hold the drawers when swapping and was not sure about storage.
To help with this, I’ve designed and 3D printed various filter holders - and I’m happy to share files so you can too!
I’ve built filter holders to hold 1, 2 and 4 filters - have a look at the pics.
If anyone is after the .stl files for this, I will send them.
I hope ZWO has a look and professionally produces something similar.
No charge for the files - just DM me. If you are going to sell them, I would like to know out of curiosity.
Cheers!

[xelasnave]

I like your idea.
I am waiting on my filters and not entirely sure where finally they will come from.
Having them in a unit such as yours is a great idea but I think some sort of lid would be a sensible addition.
I hope to end up with 7 filters.
Alex

[Alchemy]

Great idea, I have a few drawers, you could sell those, It’s got to be better than what I do

[RyanJones]

Very nice Mark. I have a ZWO filter draw but only one filter at the moment but your storage device could suit in the future. Well done.

[Startrek]

Ryan,
How do find the ZWO filter drawer
I dropped my L Extreme the other night in the Obs trying to screw it on my 2600MC ( stupid idea ) luckily no damage
What holds the filter firm once it’s inserted , springs or does it just sit in a cradle
My L Extreme is a 2”
If in the future I ever go Mono , I could still use the filter drawer I suppose , not ideal but doable
Thanks
Martin

[RyanJones]

Hi Martin,

It has two mechanisms to hold it in. First is a pair of magnets that hold the draw into the holder. The second is a spring loaded grub screw that kind of locks it in once it’s in. Personally I’ve tightened the grub a bit more because the magnets seem a little weak. I certainly wouldn’t trust them alone. It’s a good system and saves the extra weight of a filter wheel. I’m with you that if I go mono then it will do initially whilst building up a filter collection. They’re not expensive either.

Cheers

Ryan

[AdamJL]

Oh my goodness. I have the ZWO filter drawer and had no idea that grub screw was there.. what a difference!!! I just tightened it and it's a really solid lock now. Thanks for that! I never liked the weak magnets, but this really fixes the entire issue with the holder.

Cheers :)

[Startrek]

Ryan,
Thanks mate great , I’m going to order one as screwing these filters on the end of the coma corrector is fiddly due to the fine thread
Martin

[RyanJones]

With the added bonus that the housing is 21mm deep. This means it can be swapped out for one of the spacers between your coma corrector and camera.

[Startrek]

Ryan,
Thanks
Yeh I checked , clean swap which is great plus retain my existing 1mm spacer ring ( 56mm coma corrector to sensor )
Martin