Coma Corrector Crazy $$$ ???

I'm relatively new to astronomy and I'm just setting up my first better than beginner setup based around a Sky-Watcher Quattro 200P. 

I understand the F4 speed is achieved at least partially through the more curved primary mirror and that's why they need a special coma corrector to compensate. But OMG...

Why is the Quattro coma corrector at $375 more than half the price of the entire OTA???

Originally Posted by Larry Holt

I'm relatively new to astronomy and I'm just setting up my first better than beginner setup based around a Sky-Watcher Quattro 200P. 

I understand the F4 speed is achieved at least partially through the more curved primary mirror and that's why they need a special coma corrector to compensate. But OMG...

Why is the Quattro coma corrector at $375 more than half the price of the entire OTA???

Because it's an imaging newtonian optimized for astrophotography. As such, the corrector provides:
f/4 ED coma corrector
FPL51 and Schott glass
Optimized for Quattro imaging Newtonians
Requires 55mm backfocus
https://www.adorama.com/skws20204.html?gclid=Cj0KCQjw4eaJBhDMARIsANhrQAA-7esEOpH_71nR1w3_dRWD-LpEmP6cp3TT-aO6_muZvJ9mhAK-ye0aAtMHEALw_wcB&gclid=Cj0KCQjw4eaJBhDMARIsANhrQAA-7esEOpH_71nR1w3_dRWD-LpEmP6cp3TT-aO6_muZvJ9mhAK-ye0aAtMHEALw_wcB&utm_source=adl-gbase-p
A possible visual & photographic corrector option:
https://www.highpointscientific.com/baader-planetarium-2-mark-iii-multi-purpose-coma-corrector-mpcc?utm_source=google&utm_medium=cse&utm_term=BAD-MPCC&gclid=Cj0KCQjw4eaJBhDMARIsANhrQAAYr55d-lRTtRNYwtaZvDs7YGX493HkG-AasGbfAxoeCJ0HDXQ8h2saAvhPEALw_wcB
Visually, this MAY work but may not for photographic:
https://www.aliexpress.com/item/32917167365.html?spm=a2g0o.productlist.0.0.3ed77642rn5ljH&algo_pvid=ef2e4e22-011a-49b9-967d-8092ef54280a&algo_exp_id=ef2e4e22-011a-49b9-967d-8092ef54280a-1&pdp_ext_f=%7B%22sku_id%22%3A%2266029924265%22%7D