[shaneaust (Mick)]

i've been star testing my scope lately, but when i get to the "de-focusing" step, i see circle with the reflection of my secondary in the middle okay, but i dont see any "concentric" rings at all - does this mean it's badly out of collimation? the scope is a bintel bt-252. good sharp views using low powered ep's but a bit disappointing using high powered ones...

thanks!