No longer needed as the Askar is a petzval and the TSAPO uses the Riccardi
Hence surplus to my needs
It has 55 mm backfocus and comes with an adapter to screw onto most 2 inch focusers direct the camera/adapter side is m42 so will suit most asi cameras etc.
Works well and does produce some very wide shots. I don't recommend full frame cameras as there will be some small vignetting but anything with the smaller sensors it works beautifully
Specs are
here
Yours for $150 posted