Vixen PH corrector for Vixen r200s

[beren]

For Sale a Vixen PH corrector for the Vixen r200ss
astrograph Newtonian. This is the top of the line corrector out of the three available for the r200ss from Vixen . Price $400 plus post

[traveller]

Pardon my ignorance but what is the difference between this coma corrector and the “original” vixen coma corrector 3? The latter sells for $165, is the PH corrector “worth” the extra dollars?
Thanks
Bo

[beren]

https://global.vixen.co.jp/en/product/37237_9/ at the bottom of the page is spot diagram of the r200s without correction, with the coma corrector 3 and the PH corrector

[traveller]

Thank you,
Let me get the GWT polished first ;)
Bo

[beren]

reduced to 300 plus post