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New to Photomacrography.net - very overwhelmed at the moment
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ChrisLilley



Joined: 01 May 2010
Posts: 680
Location: Nice, France (I'm British)

PostPosted: Sat Aug 27, 2011 1:07 pm    Post subject: Reply with quote

abpho wrote:

Do I need to worry about cover glass thicknesses?

Do I need to worry about the different immersion types?


I would say "yes" to both.

You don't want an objective that needs a cover glass and you don't want an objective that needs to be immersed in oil or water or glycerol.
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ChrisLilley



Joined: 01 May 2010
Posts: 680
Location: Nice, France (I'm British)

PostPosted: Sat Aug 27, 2011 1:12 pm    Post subject: Reply with quote

abpho wrote:

What is the difference between an M plan, CFI plan and a BD plan? Is this only pertinent to Nikon?


M Plan are for metallurgy. This means that they use a 210mm tube length rather than 160mm (so you set your bellows a bit longer) and they are designed to not need a cover slip (which is good).

CF means "chromatic free" and implies that the objective can be used without a matching eyepiece; all the oprtical correction happens in the objective (which is good, for macro).

CFI is the infinity form of CF.

BD is brightfield/darkfield. In terms of using a BD objective for macro, the practical implications are a) it may use a different sized scrw mount b) you may need to block up the illumination light path.
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abpho



Joined: 17 Aug 2011
Posts: 1426
Location: Earth

PostPosted: Sat Aug 27, 2011 1:55 pm    Post subject: Reply with quote

Thanks Chris. This is starting to make sense. Now I just need to get lucky and find some cheap objectives. I never knew they could cost that much. I have some respect for the people here that have amassed a small collection. They most probably have more disposable income than I do at this moment. Laughing
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Craig Gerard



Joined: 01 May 2010
Posts: 2877
Location: Australia

PostPosted: Sat Sep 10, 2011 7:22 pm    Post subject: Reply with quote

Have you had a chance to play with the Nikon Labophot 10X 0.25 160/- objective?


Craig
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To use a classic quote from 'Antz' - "I almost know exactly what I'm doing!"
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abpho



Joined: 17 Aug 2011
Posts: 1426
Location: Earth

PostPosted: Sat Sep 10, 2011 7:31 pm    Post subject: Reply with quote

It has not arrived yet. I was holding my breath. But after 30 seconds I gave up.
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