|
What attracted me to the effectiveness of the Bahtinov Mask was the ability to obtain critical focus at long focal lengths and long(ish) exposures.
When using a PowerMate or Barlow to produce an effective focal length of over 5000mm and exposures of over 1 second, this mask seems to be able to dial in the focus very quickly and unambiguously.
Another scenario for a future test is using it with “Remote Live View” on the canon 40D to assist with DSLR focusing as my set up does not have any software support for this task.
Having said all of that, I must say that the nerd in me had the Bahtinov Mask on the ‘scope last night as I went through my range of eyepieces, pumping the motor focusing buttons just to watch the intra-focal, at focus and extra-focal patterns as they danced in front of my eyes.
Cheers
Dennis
|