Heritage-150P + barlow and 7-21mm zoom

[grjsk]

Has anybody calculated how much weight the Heritage-150P focuser can handle before it starts to flex? Will it survive a small shorty barlow and a hyperflex 7-21mm zoom (190 gram)?

 

[cajen2]

I don't know about 'calculate' but it would be quite happy with that. Even better if you've done the PTFE tape mod.

Mine doesn't complain with some fairly weighty EPs on it (Pentax XWs, for example).

Edited October 11, 2022 by cajen2

[wulfrun]

As above, I think it'll be fine as well. I've had a 2x focal extender plus ES 20mm or Nirvana 16mm and it doesn't seem to mind. If there's any sag, I haven't spotted any effects from it. Biggest worry is not unscrewing it too far with that much £££ attached!

[Astro_Dad]

I’ve used a BST 2x shorty Barlow with a SvBony 7-21mm zoom and just checked - 241g. No problem at all, and I’ve used combinations heavier than that. I used to have concerns about potential flex too, but really it holds up very well. 

[grjsk]

Thanks alot. Seems like it whould work just fine then. 

[cajen2]

My Pentax XW 5mil is 395g. No problem at all.