Talk:Cooke triplet

Difference in early triplets
Is there any specialist in optics that can explain us what is the difference between the Cooke triplet and early achromatic triplets ? Ericd 12:37 Apr 21, 2003 (UTC)


 * Is there any specialist in optics than can explain me why dont we use two convex lens and one converging lens in a cooke triplet. +-- combination? salmanatir@yahoo.com —Preceding unsigned comment added by 202.165.236.3 (talk) 06:42, 22 May 2008 (UTC)

Early designs?
Removed the unreferenced section "Early designs" because it seems to be original research consisting of seeing an old Britannica article and implying it is the same lens. Fountains of Bryn Mawr (talk) 23:17, 12 December 2013 (UTC)