1/f = 1/v + 1/v'
- From: "Theo Griep" <griep@xxxxxxxxx>
- Date: Wed, 11 Feb 2009 19:35:41 +0100
Richard, that seems straightforward, but then why does Leitz say in their
manual (second part of this one, skip the first Dialux part:)
http://www.science-info.net/docs/leitz/Leitz-160mm-Memo.pdf
that only (160mm) objectives with magnification higher than 16x should be
used that way?
thanks,
Theo
"Richard J Kinch" <kinch@xxxxxxxxxxx> wrote in message
news:Xns9BAED0033594someconundrum@xxxxxxxxxxxxxxxxx
Theo Griep writes:
So, both objectives and eyepieces are missing the essential data about
the intermediary image distance. Instead, objectives have a nonsense
tubelength value on them.
You're quite right.
That said, you do not need to change the tubes to get the intermediate
image where you want it. This can be done simply by normal focusing.
Since 1/f = 1/v + 1/v', when v changes slightly, you just change v'
slightly to compensate.
.
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