From: André Heijkoop
To: Franck Griere
Sent: Tuesday, October 26, 2010 8:49 PM
Subject: Info about mirror set
First I want to apologize about the mail in English. My French is just terrible, butfeel free to reply in French.
I’m in the planning stage of my new to make Dobson. And first things first if youwant to make a Dobson you have to know what mirrors you’re going to use.
My new (travel)Dobson will be the biggest that will fit my VW transporter withspare room for luggage, I’m thinking about 600mm (24”).
In your mirror specs I see a 598mm with a focal ratio of F3.8, As I don’t mindusing a ladder, can you make a 598mm mirror with a less critical focal ratio ofF4.5 as well?
Can you give me info of:
The diameter and focal ratio of the main mirror
The weight and thickness of the main mirror
The diameter of the secondary mirror, for mainly DeepSky viewing
The costs of the mirrors with the highest reflectivity (96%)
The delivery time
Other respected French companies which sell Dobson parts as secondary holders,spiders, mirror cells, etc.
Is it possible to visit your factory? I could combine the visit with my (third) stayat the RAP next year.
To avoid shipping problems, is it possible to collect the finished mirrors at yourfactory?
Thanks in Advance,