Jump to content


5x Powermate on a PST with a webcam?

Recommended Posts

Wondering if this will reach focus as Anthony has one for sale, and Starman (Pete Lawrence) has used one to stunning effect with a different camera. Mine's an SC3 from Astronomiser if that helps.

Reason for the question, PSTs are a pain when it comes to getting stuff to focus. Using an eyepiece works great, but a webcam like mine (and a DSLR) will only work with a Barlow. From the Televue website, it appears that the Powermate doesn't change the focus point like a conventional Barlow lens, so it might not work. Anybody had a go yet?

Might need one anyway when some big planets come around again, but it will need to do double duty to justify the cost in the short term.


Captain Chaos

Link to comment
Share on other sites

I have been reading about that Arthur, and putting the etalon in an expensive APO (how much spectrum spread are they expecting?), and other high stake gambling. Rumour has it that newer models have a really important filter in the bit you wrestle off though, so I don't wan't to risk messing it all up. Mine works with a normal (Skywatcher) Barlow ATM so if I got a 5X and had to use it with another Barlow, it would be too much I fear. Better then to go for a 2.5X plus the one I have.

Captain Chaos

Link to comment
Share on other sites

No - I think you are referring to a different mod CC. I mean the EP holder (the 1.25" bit) sits on top of a spacer about 25 mm high. This unscrews (but it's loctited so needs a bit of a tug) and then you screw the EP holder back in. Bingo - an instant 25mm more in-travel.

The other mod involves ditching the pointy end and screwing in a 2" adapter to the etalon/diagonal assembly and using a suitable refractor, fitting an ERF over the cell. However, these ERF's are hard to come by... :wink: :nono:


Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.