Re: magnification 100x

On 13 July, 09:20, john <du...@xxxxxxx> wrote:
  THANKS to all who answered this thread. I am learning a lot with your
help.

Rich schrieb:

 >
 > If seeing an image as large is your goal, as opposed to resolution
 > (look the word up), then what I would do would be to buy a surplus
 > surveillance video camera that takes c-mount lenses, and adapter for
 > the microscope and a BIG surplus CRT video monitor and pipe the image
 > to it.  The virtual look of the image will be far larger appearing
 > than looking in the eyepiece, even if you won't see nearly as much
 > detail...

Yes, This is the next step : to attach a good quality video camera which
is attached to a PC, so to have all on the screen.

Bit I would like also to 'see' the same resolutione that I have on the
lenses. I am aware taht by doing this, one 'skips' the  magnification on
the 'ocular' lenses.

WHich means if I have a lens 40x the magnification remains 40x, doesnt
become 400x adding the 10x of the ocular.

Am I right ?

For what concerns the larger 'working distance, I want to go in this
direction. I have already contacted a couple of shops which sell this
things, but they are more expensive.

I wonder if it is wiser to go for a micrdcope with lenses 'under' the
object.

I have to admit that I don't like very much the 'oil' solution.

Because it forces to cover everything with another piece of plastic, so
that the object doesn't come in contact with the oil.
Adding also 'noise' to the image.

In my microscope, (probably a 'cheap' one also if it costs a bit less
that 900 dollars), I can only use the 4x and 10x lenses with a
reasonable distance.

The 40x lens already 'touches' the glass. Thats why I am a bit disappointed.

Thanks again to all who have answered.

John.

Something is wrong here!
A x40 should bring to focus a few mm above the slide surface, unless
you are using a VERY thick cover glass. I suggest you raise the
objective just off the slide, then back off further slowly as per
instructions in my previous post.
I assume the objective came with the microscope, and is the correct
tube length and not an infinity corrected one (has an oo infinity sign
on it). These infinity objectives are only suitable for the scope to
which they were originally fitted. if yours is a second hand
instrument, maybe someone has stuck a oo objective on it, in which
case try a fixed length objective (usually 160 on the barrel).
If you could tell us more about your scope - cost, make, age, new or s/
h, and the objectives: numbers and letters on them, we might be able
to tell you what is wrong, but it is not easy without this
information.
HJ
.

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