Hello All
I have been ready lots of posts, most recently another excellent one by Mark R. and I am wondering about how focal ratio (FR) relates to deep sky performance. I undestand the effects of the central obstruction as it relates to the MCT vs MN. and also understand how the FR relates to field of view.
However what I am wondering is does a shorter FR scope perform better on deep sky because it "sees the light" faster or better than a longer FR or is it mainly because a wider field of view issue.
Thanks
Randy
I have been ready lots of posts, most recently another excellent one by Mark R. and I am wondering about how focal ratio (FR) relates to deep sky performance. I undestand the effects of the central obstruction as it relates to the MCT vs MN. and also understand how the FR relates to field of view.
However what I am wondering is does a shorter FR scope perform better on deep sky because it "sees the light" faster or better than a longer FR or is it mainly because a wider field of view issue.
Thanks
Randy