From: Pav <bobhog@pin.co.nz>
Date: Mon, 1 Oct 2001 20:13:18 +1200
To: <BiologicalBeekeeping@yahoogroups.com>
Subject: Re: Wing Veins & Bee analyses'

Hi Folk, Dave and Harvey espec:

At 30/09/01 14:51:00, Dave wrote:

>I was hoping that with an x & y adjustment
>the slide image could be brought
>into coincedence with the wing image
>being observed by the other eye.

Mmm, still possible, even feasible for some folk, but as for practical... Also, many folk will have a hard time achieving 'stereoscopic co-incidence' in this type of scenario - visually precarious and frequently unstable.

I can see where you're going though, you want simultaneous viewing, and the root of the problem i see is that you are trying to use 1 eye for slide, 1 eye for wing. How about ensuring your reference slide is scaled to life-size, putting it on a wee light box (a torch ('flash-light" for the americans) would do in extreme need, but a softer diffuser would be better, like those el-cheepo touch-lamps have), sit your sample wing overtop and view both with one eye through the loupe (assuming the slide had good enough venous contrast)?

Myself, i'd still be leaning towards the enlargement and Chris' mind's eye (which was what i meant by "temporal" - view one at a time). Then Harvey's super-slides can stay safely locked in the vault with the master CD (although different vaults - eggs in one basket and all), and i can take the enlarged easy-to-see print-out into the field (or maybe just my laptop - propolis keys!). Each to their own preference - but first ya gotta have the reference wing pic's available on Barry's site ey?!

>The slide "V"s would have to be sized
>to compensate exacly for the
>magnification of the monocular.

Uh oh...

>The vein pair that is used for CI are very
>small...

OK, i'm with you here: CI= cubital index a:b, i link to a good picture of this from my "more bees" page...

>but "V"s with a subtended
>angle of 152 degrees could be arranged
>so that 30 of them (the values 1.00
>to 4.00) would go on one 35 mm slide.

Awww... what? Are we talking discoidal shift here? Please help me chip-away at my mountain of ignorance. I don't know where you're coming from with this.

-Pav, confused again.