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[ATM] Question of grinding longer focal legnths
- Subject: [ATM] Question of grinding longer focal legnths
- From: polaraligned at optonline.net (polaraligned)
- Date: Mon Mar 1 02:27:30 2004
- References: <c9.3e4b21ea.2d735e94@aol.com>
Would a f/6 on a 32" be significantly easier to grind than
a shorter focal ratio or is it still a monumental task at that
diameter? I know how long the mirror focal legnth is at
this f-ratio and would fold it for an eyepiece height less than
that of a 25", f/5. How big of a step up is it for someone
who has sucessfully done a 20" mirror?
Scott