Re: Canon 350D for photomicrography?

Thank you for your detailed reply. I hope I do not appear to be too
inquisitive, but I have more questions. Do you use the 350D's mirror lock up
(MLU) feature? What exposure times do you operate with? Does Canon provide
SW to remotely control the camera via the USB connection?

I collected good results when using the Nikon D70 for photomicrography. But
since the D70 does not support MLU, I use an external shutter. This
eliminates all possible vibrations from shutter curtain and mirror slap.
Since the D70 does not meter when connected with a T-mount adapter
(something the 350D does not suffer under), I use the histogram to ensure
correct exposure.

It appears that the 350D is the better choice for photomicrography, if one
does not attempt to use it for IR photography. (But even for IR photography,
the IR filter could be removed as has been already demonstrated with various
DSRL cameras.)

Gregor

PS: You can find a small comparison between various digital cameras at my
PBase account (http://www.pbase.com/overney/technology_photomicrography). I
shall post more images soon.

<bobmarable@xxxxxxxxxxxxx> wrote in message
news:1115606633.947657.28600@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>I used "aperature priority", without a camera lens (I had a 10x
> eyepiece in the adapter unit), for photos of stained tissue sections;
> I'll post the pictures, if I can figure out how (I hate computers).
> The camera selected the shutter speed, and the pictures were nicely
> exposed. However, focusing is a little troublesome--you must use the
> optical viewfinder for real-time focusing--I use a right-angle adapter
> on the viewfinder to provide a more convenient viewing position with my
> trinoc head. I don't know about the flash, but it's an area that I'm
> interested in (for pictures of live protozoa).
> I probably will use direct projection; my current SLR/T-mount adapter
> has been rigged with an eyepiece securely fastened in place, so I
> haven't set up a "lens-free" unit yet (I will try moving it out some.
> I'm also thinking about a way to use a focusing eyepiece for the same
> purpose, maybe...????).
> P.S.--re. real time focusing: I use a video cable to view captured
> images on a small TV (better than the camera's LCD); I can take a test
> picture focused via the viewfinder, immediately view it on the TV, and
> adjust focus, if necessary (obviously doesn't work with live cavorting
> beasties).
>
> I'm interested in your results, and those of others.
>
> Bob Marable
>


.

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