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Old Mar 28, 2009, 10:53 PM   #1
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Recently I bought a Sony a350 primarily to use my old Minolta 500mm AF mirror lens, but also to use for photomicrography. Sony's implementation of live view coupled with the large fold out LCD screen makes it extremely convenient. All you need is a T-mount microscope adapter with a Minolta/alpha T-mount (and of course a microscope). I mounted it on an Olympus CH2 with an Olympus NFK 2.5 LD photo ocular (although any ocular will do). A trinocular tube is convenient, but any eyepiece tube of proper diameter to fit the adapter will do, but the microscope should be one with a fixed body and focusing stage, rather then a focusing body and fixed stage due to the weight of the dslr body. The chief advantage of using a dslr rather than digiscoping with a p&s is the larger sensor. In Sony's implementation of live view there is no interruption of image viewing during mirror operation, and there is less flipping of the mirror than in any other dslr live viewing system. The latter may be of importance only with live moving subjects. With no lens mounted on the camera, manual exposure must be used - there is an on screen scale (also in the viewfinder) that operates like the old match needle metering from film camera days.

In the composite photo below there is a microphotograph of Abraham Lincoln on the screen (a photomicrograph of a microphotograph :G mounted on the slide which is on the stage). The photograph of the setup is over processed and needs to be redone - the photomicrographs that follow are better, in spite of the fact that they are the first ones I took.
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Old Mar 28, 2009, 10:54 PM   #2
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1 snail teeth (radula)
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Old Mar 28, 2009, 10:55 PM   #3
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2 insect antenna
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Old Mar 28, 2009, 10:56 PM   #4
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3 ant
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Old Mar 28, 2009, 10:56 PM   #5
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4 fly
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Old Mar 28, 2009, 10:58 PM   #6
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5 tick
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Old Mar 28, 2009, 11:02 PM   #7
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6 higher magnification of #2
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Old Mar 31, 2009, 9:29 AM   #8
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Interesting.
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Old Apr 5, 2009, 11:25 PM   #9
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Damn they're good images. Love the snails teeth.
I'd like to mount my camera (when I decide which one) to my 5" telescope, probably uses a similar mounting.
What mount type is the old Minolta 500m mirror. MC/MD or later ?
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Old Apr 6, 2009, 6:46 AM   #10
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He mentioned a Minolta AF 500mm. ;-)

This is an AF (Autofocus) lens and no adapter is required to mount one on a Minolta Maxxum or Sony Alpha body.

The Minolta (now branded as Sony) 500mm AF Reflex (mirror) lens is the only Autofocus lens of it's type.

Other brands of 500mm Reflex lenses are manual focus only (and most are T-Mount with an included adapter for the camera system you want to use one with).

But, Minolta Maxxum or Sony Alpha bodies will Autofocus with a Minolta Maxxum or Sony Alpha 500mm AF reflex lens (and you'd enjoy the benefits of stabilization on a Maxxum or Sony dSLR body, thanks to the camera body based stabilization system). It's not a cheap lens though:

Sony 500mm f/8 Reflex Lens at sonystyle.com


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