Re: microscopy

On Sat, 26 Nov 2005 10:49:08 GMT, "David J Taylor"
<david-taylor@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote:

>Volvox wrote:
>> I'm looking around for a DSLR for use with a microscope.
>>
>> To cut down on vibration I would like to have a mirror lock.
>> (I will be using x20 and x40 objectives.)
>>
>> Also a remote shutter release would be an advantage.
>>
>> I have read about iso settinga, and would also think of using a high
>> value setting - say iso 1600. I understand what noise is, but can
>> find little information comparing different cameras in this respect;
>> ie which cameras are more noisy than others.
>>
>> Any suggestions as to suitable models to look at gratefully received.
>>
>> Robert
>
>You may want to ask in the Yahoo! Group:
>
> http://groups.yahoo.com/group/CoolpixPhotoMicMac/
>
>where people are already doing this sort of work. The Nikon Coolpix range
>are held in high regard in this application.
>
>David
>

Problem is the same with using telescopes, that the using a fixed-lens
camera requires (in most cases) a huge eyepiece in either the
microscope (difficult) or telescope (easier) in order to provide a
fully-illuminated field when doing "afocal" photography. With a DSLR,
the problem is easier avoid since the DSLR would be used without a
lens, using the microscope or telescope eyepiece only as the relay
element. That is called "eyepiece projection" photography. Before,
when sensors in prosumer and p&s cameras were small, their lenses were
small (front diameter) as well, meaning it was easier to get near or
full field illumination in the camera with a conventional microscope
or telescope eyepiece size. Now, with long zooms and large front
elements on prosumers, it's more difficult. The Coolpix cameras(995,
etc) like Olympus's C30xx series had relatively small front lens
elements and full field illumination was easier to achieve with
conventional eyepieces.
-Rich
.

Relevant Pages

  • Re: DSLR microphotography
    ... > I'm looking around for a DSLR for use with a microscope. ... > I have read about iso settinga, and would also think of using a high value ... > information comparing different cameras in this respect; ...
    (rec.photo.digital.slr-systems)
  • Re: Cheap&cheerful setup for an occasional optical microscope photograph?
    ... I have fully settable intensity on the microscope in any case. ... Ill do a bit more playing and see if I can get in focus subject with a closer camera.. ... If the "fully settable intensity" on your microscope is a voltage control to dim the lamp, it is not the best way to control exposure. ... BTW, in answer to your original question, the simplest way I have found for quick photomicrographs is using an eyepiece with a screw thread cut on the top rim which fits the front thread of a Coolpix 9xx/4500 camera. ...
    (sci.techniques.microscopy)
  • Re: Kimwipes (5*8 wipes) v.s. Lens Paper?
    ...  Wiping a lens surface dry just scratches the heck out of it, ... The main difference between cameras and microscopes is the size of the ... camera and a microscope. ...
    (sci.techniques.microscopy)
  • Re: OT Optical Sensors over USB
    ... As Bob U suggests, there are a lot of options in using video cameras adapted to microscopes, and there are adapters for numerous consumer digital cameras so they fit microscopes. ... There are a lot of high quality compact video cameras with lots of lens options, but laboratory-grade equipment isn't likely to be inexpensive. ... I've been investigating upgrading the camera included with a microscope. ...
    (sci.electronics.repair)
  • Re: color calibration of microscopic images
    ... >Digital photomicrogrphy is a current major interest. ... >professional dedicated microscope cameras including the Nikon that you ... >color when the reflected spectra are nearly the same.. ...
    (sci.techniques.microscopy)