9x50 Guidescope Focal Length

[bendiddley]

Does anyone know what the focal length is for this? Need to put it into PHD2. The guidescope is a modded 9x50 finderscope with a QHY5 on the back.

[Demonperformer]

Post #4 in this thread says 180mm for SW, but others may vary.

[bendiddley]

Thanks. I saw that thread, but the focal length that is mentioned is for the original finderscope with the eyepiece on the back as it was taken from a website selling the original finderscope. I need to know what it is without the eyepiece as the QHY5 is there instead if that makes sense.

[Starlight 1]

I can rember seeing a post and think it was 200 update just looking for name, ok it was " Thalestris 24" put the size in alone time ago.

Edited October 4, 2016 by Starlight 1
update

[Thalestris24]

I believe 180mm is correct (180mm will be ok, anyway  ). Just measuring mine with a ruler, it's about 180mm

Louise

[KyleStoke]

I think I have always used 200mm but not sure where that came from

[bendiddley]

Cheers guys!

Edited October 5, 2016 by bendiddley