Revelation Self Center 50mm Extension Tube

[Scooot]

http://www.rothervalleyoptics.co.uk/revelation-self-center-50mm-extension-tube-2-quot_d5578.html

Does anyone know whether this is threaded for filters?

[emadmoussa]

Can't you attach the filter to the eyepiece itself?

[Scooot]

Can't you attach the filter to the eyepiece itself?

I'm going to put a coma corrector on it, it has an M48 x 075 filter thread.

[emadmoussa]

According to Green Witch, yes they are..

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Revelation 50mm Extension Tube 2" Ref: RV-FF114

• REVELATION
  

High quality CNC machined 2" extension tube with compression rings. Machined with safety recesses in the 2" barrel for added security when attached to your telescope and threaded for filters. Use with a T-ring to match your camera body to attach it directly to a 2" focuser.

• 50mm Long
  

Price: £19.00 (Including VAT at 20%)

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http://www.green-wit...ccessories.html

[Scooot]

That's not the self center one but I'll probably get that one if the self center one isn't threaded.