[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

RE: [APML] Reducer -> Image Plane Distance

Thanks,
 
Gene Horr
genehorr@texas.net
-----Original Message-----
From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On Behalf Of Chris1011@aol.com
Sent: Wednesday, October 16, 2002 11:06 AM
To: astro-photo@seds.org
Subject: Re: [APML] Reducer -> Image Plane Distance

In a message dated 10/16/2002 11:03:11 AM Central Daylight Time, genehorr@houston.rr.com writes:


When using the same reducer on a f/9 RCT would the reducer ->
image plane distance be the same in order to obtain the same
.75X reduction or would it change by the ratio of the f/ratios? 
I.e. 9*Y/7 or 1.29Y.


The distance from reducer lens to image plane remains the same for same reduction ratio.

Roland Christen