Hello Yes you must calculate the effective field with the instrument where you attach the eos1000 example If you use a ED80 with 600mm focal length Width of field = 57.3*( Width of CMOS chip / Instrument focal length) Hight of field =57.3 *(Hight of CMOS chip / Instrument focal length)
so Field's High =57.3*(14.8/600) = 1.41°=84.6 arc minutes Filed length = 57.3*(22.2/600) =2.12°=127.2 arc minutes the results that you enter in the given fields. I hope it can help you (sorry for my bad English) Claude France 46°12'N 5°23'E --- In [email protected], "dwango121" <arobinson...@...> wrote: > > Hi Everyone, > > My first post... > > I have downloaded and am using 3.0.1.4 beta and I wanted to create a > finder mark/frame for my EOS 1000D. The chip size is 22.2mm x 14.8mm. I > entered these into Width/Height in the CCD Retangle tab but when I add > a new finder circle on the chart it seems very small. Am I doing > anything wrong. Do I need to tell it what scope I am using it with > (ED80)? > > Thanks, > Al >
