Vari-Extender

Started by ivanong, 02/27/2003 07:00PM
Posted 02/27/2003 07:00PM Opening Post
Is the Tak Vari-Extender/tube system essentially a barlow-type optic with adjustable focal length?

Ivan

Posted 03/01/2003 04:55PM #1
Hi Ivan,

I'm no optical expert, but I think it is essentially as you describe. Attached is a 35mm lunar shot through a Mewlon 180, vari-extender, and three extender rings for an effective focal ratio of f36. Gives an idea of image scale. The original film image is much sharper - my inexpert scanning and reduction of file size has blurred it considerably.

Hal Coward

Attached Image:

hcoward's attachment for post 65375