Achromat Libertas

[Neil English]

Telescope Reviews: Stranger than fiction!

Happy New year!

Neil.

[Peter Drew]

An interesting read Neil. As an addition, the late Horace Dall was using oil spaced doublets much more than 30 years ago. The oiling reduced the number of air to glass surfaces thereby increasing the transmission, also if the oil was of the correct refractive index the objective then exhibited the characteristics of a single block of glass, eliminating any residual figuring errors on R2 and R3. What did much earlier opticians use in their "fluid" achromats?. Happy New Year to you too.

[Jamie]

Neil

When making a new thread or posting within one, Is there any chance of you actually posting the content on SGL your self rather than just linking to a post on another forum?

Thanks.....

[Neil English]

Thanks Pete; I wasn't aware of that. Many happy returns for 2012.

Jamie; my war started on CN and there it has ended.

Best wishes,

Neil.

[Jamie]

Jamie; my war started on CN and there it has ended.

Best wishes,

Neil.

War? What are you on about???

I ask you to contribute to actual thread content rather than just post a link and you talk to me about war.......... Are you sober????