More Focal Lenght.

[Tandum (Robin)]

Does anyone use a 2x powermate with a camera to extend the focal lenght of thier scope?

I want more focal length without paying for another scope and thought a 2X might do it. It would push the 10" newt to 1.9meters @ F7.6 which is useable.

I'm wondering if they introduce any problems when imaging?

Alternately, will a TAK 1.6 extender work in a newt? I could use that in the refractors as well.

[riklaunim]

You can also use good/high quality barlow like GSO 2.5x APO or achromatic mixed 1.5/2x GSO. There are also good 2" 2x GSO and SkyWatcher APO Barlows.

[Tandum (Robin)]

You got any images taken through one of those lenses?

[gbeal]

Robin,
I bought a while back an Antares 1.6x for this express purpose, but never tried it in the end, just got too hard, and I sold it.
Maybe even try the likes of a decent 1.4x or 1.6x convertor for the Canon or Nikon lenses?
Gary

[Garyh]

Hi Robin, Have a look at Sieberts barlows.
The 1.5x 2" gets good reviews ex with newts, actually acts like a coma corrector and barlow in one..
I have wanted one for ages! maybe Santa

http://www.siebertoptics.com/SiebertOptics-barlows.html
cheers Gary

[Tandum (Robin)]

Cheers guys, those Sieberts are pretty reasonable for a 4 element device and 1.5x would do it. I'm guessing they are not silver inside. Looks like something else to go on the endless list of things to try

[DavidTrap (David)]

Try Mark Lewis - I know he has a 2x Televue Powermate 2inch and has had reasonable success with that on an ED80. I'm hoping to try it one day in my FS-102...

DT