Filter thread
![Left a 1.25" and right a 2" eyepiece with filter attached](/CMS/images/text/glossary/Okular Filtergewinde.jpg)
Use filters for your observing: most astronomical eyepieces offer you the option to use moon filters, polarizing filters, colour or nebula filters. This will improve your observing experience and reveal a number of details that were previously not visible to you. At the lower end of the eyepiece sleeve of your 1.25" and 2" eyepieces you will find a female thread. You can use this to attach any filter from our range.
![Vixen Teleconverter Extender PH Kit for R200SS](/Produktbilder/normal/83404_1/Vixen-Teleconverter-Extender-PH-Kit-for-R200SS.jpg)
Vixen
Teleconverter Extender PH Kit for R200SS
$ 650.00
ready for shipping in 1-2
weeks
![Lacerta Teleconverter Teleextender 5x 1.25"](/Produktbilder/normal/65692_1/Lacerta-Teleconverter-Teleextender-5x-1-25-.jpg)
Lacerta
Teleconverter Teleextender 5x 1.25"
$ 214.00
ready for shipping in 1-2
weeks
![Lacerta Teleconverter Teleextender 3x 1.25"](/Produktbilder/normal/65691_1/Lacerta-Teleconverter-Teleextender-3x-1-25-.jpg)
Lacerta
Teleconverter Teleextender 3x 1.25"
$ 171.00
ready for shipping in 1-2
weeks
![APM Teleconverter Coma-correcting telecentric Barlow 1.5x 2"](/Produktbilder/normal/59296_1/APM-Teleconverter-Coma-correcting-telecentric-Barlow-1-5x-2-.jpg)
APM
Teleconverter Coma-correcting telecentric Barlow 1.5x 2"
$ 540.00
ready for shipping in 1-2
weeks