| snowdragonusa |
| (Pooh-Bah) |
| 09/04/08 11:03 PM |
|
Re: Revolutionary new way of focusing! No less!
|
Quote:
O.K. Just so I understand the formula correctly, FL*3 / 175(mean)= the total width. Then the width is divided into a slot & a bar? My scopes FL is 2024. So that would be 2024*3=6072 /175=34.6mm. The slot would be 17mm & the bar would be 17mm, correct?
Does the first 20° slot intersect the circle center, cause from what I can tell, it looks like the two angeled slots intersect short of center, Or is this not critical?
Does the number of slots matter?
Nope - leave the 3 out unless you are getting very small numbers (i.e. small focal lengths).
Yours would be 2024/150-200 = 10 to 14 mm. Now take that number and divide by 2 so you would have an alternating 5mm cutout and a 5mm strip etc.