[ATM] refractive index of air

[Richard]

Hi Dominic-Luc,

Wednesday, August 8, 2007, 3:04:44 PM, you wrote:

DLW> I reasoned this as well. I have only done a little polishing on
DLW> the still spherical F/4.8 primary, and it looks like a decent
DLW> sphere. I expect to be able to get the secondary to match this
DLW> ROC. From there, the plan is to get the secondary hyperbola
DLW> polished as close as possible to original specifications. When I
DLW> am confident about the figure of the secondary, I am hoping to
DLW> just back calculate the primary conic and tweak the primary
DLW> figure as needed.

Ah good. I think Jim regrets starting his RC the other way round, eh
Jim? ;)

DLW> At some point, I may need some advice on a field corrector.

I'll contact you offlist about this.

-- 

Best regards,
  Richard in the UK