4 replies to this topic

[CliveFX]

Hello! I am designing a custom eyepiece tray. I am trying to future-proof it a bit so I can hold filters in it as well. I am putting slots in it that are under the diameter of the filters, so you can put them in like you would put a coin in a slot. Here is the catch: Since this is for future proofing, I don't actually have any filters to measure! 

I think that the Baader 2" filters are 6mm thick, but I can't seem to find any dimensions for filter cells on any vendors site. 

 

I am most interested in the thickness of the Baader 2" and 1.25" variable polarizer, as well as the thickness of various other mounted filters. Might any of you have a filter and a caliper nearby? 

 

Also: Are there other things you wish you could hold in an eyepiece tray? I am mostly planning for 2" and 1.25" eyepieces, 2" and 1.25" filters, 2" to 1.25" adapters, a few barlows. 

 

Thanks so much! 

 

 

 

Edited by CliveFX, 21 January 2022 - 02:45 PM.

[Star Shooter]

I have three Celestron filters that I believe are made by Baader. At least the filter ring looks like the photos of the Baader Products. The ring thicknesses (average of three measurements around the circumference) are as follows:

 

1.25" UHC thickness=.306"

2" UHC thickness=.401"

2" O III thickness=.318"

[CliveFX]

Thanks so much! I appreciate the measurements

[Star Shooter]

From the Baader website, 2" filters specs.

 

Standard thickness is 8mm,

Low Profile thickness is 6mm

Double Polarizer thickness is 15mm

 

Note: may not include the length of the filter threads.

[Starman59]

Personally, I wouldn't leave bare filters out in the open to collect floating particles between use. And the more you handle them the greater the odds they will get smudged.