Q Quinn Member Joined 2005 2005-05-14 8:24 am #1 2005-05-14 8:24 am #1 What formula would i need to be using to determine throw distance, if i switch from a normal triplet to the pro lens? fresnel has FL of about 12 and i believe 15 inches respectivly. Thanks.
What formula would i need to be using to determine throw distance, if i switch from a normal triplet to the pro lens? fresnel has FL of about 12 and i believe 15 inches respectivly. Thanks.
